期刊文献+
共找到27篇文章
< 1 2 >
每页显示 20 50 100
Manipulating d-d orbital hybridization induced by Mo-doped Co_(9)S_(8) nanorod arrays for high-efficiency water electrolysis
1
作者 Xue Zhou Jing Li +8 位作者 Guangyao Zhou Weiran Huang Yucan Zhang Jun Yang Huan Pang Mingyi Zhang Dongmei Sun Yawen Tang Lin Xu 《Journal of Energy Chemistry》 SCIE EI CAS CSCD 2024年第6期592-600,I0015,共10页
Precisely refining the electronic structure of electrocatalysts represents a powerful approach to further optimize the electrocatalytic performance.Herein,we demonstrate an ingenious d-d orbital hybridization concept ... Precisely refining the electronic structure of electrocatalysts represents a powerful approach to further optimize the electrocatalytic performance.Herein,we demonstrate an ingenious d-d orbital hybridization concept to construct Mo-doped Co_(9)S_(8) nanorod arrays aligned on carbon cloth(CC)substrate(abbreviated as Mo-Co_(9)S_(8)@CC hereafter)as a high-efficiency bifunctional electrocatalyst toward water electrolysis.It has experimentally and theoretically validated that the 4d-3d orbital coupling between Mo dopant and Co site can effectively optimize the H_(2)O activation energy and lower H^(*)adsorption energy barrier,thereby leading to enhanced hydrogen evolution reaction(HER)and oxygen evolution reaction(OER)activities.Thanks to the unique electronic and geometrical advantages,the optimized Mo-Co_(9)S_(8)@CC with appropriate Mo content exhibits outstanding bifunctional performance in alkaline solution,with the overpotentials of 75 and 234 mV for the delivery of a current density of 10 mA cm^(-2),small Tafel slopes of 53.8 and 39.9 mV dec~(-1)and long-term stabilities for at least 32 and 30 h for HER and OER,respectively.More impressively,a water splitting electrolylzer assembled by the self-supported Mo-Co_(9)S_(8)@CC electrode requires a low cell voltage of 1.53 V at 10 mA cm^(-2)and shows excellent stability and splendid reversibility,demonstrating a huge potential for affordable and scalable electrochemical H_(2) production.The innovational orbital hybridization strategy for electronic regulation herein provides an inspirable avenue for developing progressive electrocatalysts toward new energy systems. 展开更多
关键词 d-d orbital hybridization Transition metal sulfides nanorods arrays Water electrolysis
下载PDF
Atomic Dispersion of Rh on Interconnected Mo_(2)C Nanosheet Network Intimately Embedded in 3D Ni_(x)MoO_(y) Nanorod Arrays for pH-Universal Hydrogen Evolution
2
作者 Thi Luu Luyen Doan Dinh Chuong Nguyen +5 位作者 Patrick M.Bacirhonde Ahmed S.Yasin Abdelrahman I.Rezk Nelson Y.Dzade Cheol Sang Kim Chan Hee Park 《Energy & Environmental Materials》 SCIE EI CAS CSCD 2023年第5期236-250,共15页
Herein,a simple synthetic approach is employed for the atomic dispersion of Rh atoms(Rh SAs)over the surface of interconnected Mo_(2)C nanosheets intimately embedded in a three-dimensional Ni_(x)MoO_(y)nanorod arrays(... Herein,a simple synthetic approach is employed for the atomic dispersion of Rh atoms(Rh SAs)over the surface of interconnected Mo_(2)C nanosheets intimately embedded in a three-dimensional Ni_(x)MoO_(y)nanorod arrays(Ni_(x)MoO_(y)NRs)framework;we found that the introduction of both isolated Rh SAs and Ni_(x)MoO_(y)NRs adjusts the electrocatalytic function of the host Mo_(2)C toward the direction of being an advanced and highly stable electrocatalyst for efficient hydrogen evolution at pH-universal conditions.As a result,the proposed catalyst outperforms most recently reported transition metal-based catalysts,and its performance even rivals that of commercial Pt/C,as demonstrated by its ultralow overpotentials of 31.7,109.7,and 95.4 mV at a current density of 10 mA cm^(-2),along with its small Tafel slopes of 42.4,51.2,and 46.8 mV dec^(-1)in acidic,neutral,and alkaline conditions,respectively.In addition,the catalyst shows remarkable long-term stability over all pH values with good maintenance of its catalytic activity and structural characteristics after continuous operation. 展开更多
关键词 hydrogen evolution reaction Mo_(2)C nanosheets Ni_(x)MoO_(y)nanorod arrays pH-universal catalyst single Rh atoms
下载PDF
Effect of KOH treatment on structural and photovoltaic properties of ZnO nanorod arrays 被引量:2
3
作者 周艺 李荡 +3 位作者 黄燕 何文红 肖斌 李宏 《Transactions of Nonferrous Metals Society of China》 SCIE EI CAS CSCD 2012年第11期2736-2741,共6页
ZnO nanorod arrays (NRs) were synthesized on the fluorine-doped SnO2 transparent conductive glass (FTO) by a simple chemical bath deposition (CBD) method combined with alkali-etched method in potassium hydroxide... ZnO nanorod arrays (NRs) were synthesized on the fluorine-doped SnO2 transparent conductive glass (FTO) by a simple chemical bath deposition (CBD) method combined with alkali-etched method in potassium hydroxide (KOH) solution. X-ray diffraction (XRD), scanning electron microscopy (SEM) and current-voltage (I-V) curve were used to characterize the structure, morphologies and optoelectronic properties. The results demonstrated that ZnO NRs had wurtzite structures, the morphologies and photovoltaic properties of ZnO NRs were closely related to the concentration of KOH and etching time, well-aligned and uniformly distributed ZnO NRs were obtained after etching with 0.1 mol/L KOH for 1 h. ZnO NRs treated by KOH had been proved to have superior photovoltaic properties compared with high density ZnO NRs. When using ZnO NRs etched with 0.1 mol/L KOH for 1 h as the anode of solar cell, the conversion efficiency, short circuit current and open circuit voltage, compared with the unetched ZnO NRs, increased by 0.71%, 2.79 mA and 0.03 V, respectively. 展开更多
关键词 ZnO nanorod arrays SnO2 transparent conductive glass alkali etching structural properties photovoltaic properties solar cells
下载PDF
Hydrothermal growth of well-aligned TiO_2 nanorod arrays: Dependence of morphology upon hydrothermal reaction conditions 被引量:3
4
作者 LI Yuxiang ZHANG Mei +1 位作者 GUO Min WANG Xidong 《Rare Metals》 SCIE EI CAS CSCD 2010年第3期286-291,共6页
Well-aligned TiO2 nanorod arrays (TNAs) were prepared on pretreated quartz substrates via hydrothermal method.The effect of the different preparation conditions on the growth morphologies of TNAs was systematically ... Well-aligned TiO2 nanorod arrays (TNAs) were prepared on pretreated quartz substrates via hydrothermal method.The effect of the different preparation conditions on the growth morphologies of TNAs was systematically investigated by X-ray diffraction (XRD) and field-emission scanning electron microscopy (FE-SEM).The photocatalytic properties were tested by photodegradation of a methyl blue solution.It is demonstrated that the hydrothermal reaction conditions,such as precursor concentration,hydrothermal reaction temperature,and hydrothermal reaction times,can greatly affect the growth of TNAs.Controlling the preparation process,TNAs with 2 μm in length and 140-170 nm in diameter and well-aligned orientation have been successfully prepared.The photocatalytic experiment results indicate that TNAs have much better photocatalytic activity than TiO2 nanoparticles. 展开更多
关键词 titanium dioxide nanorod arrays hydrothermal method PHOTOCATALYST
下载PDF
Novel photoelectric material of perovskite-like(CH_(3))_(3)SPbI_(3) nanorod arrays with high stability 被引量:3
5
作者 Ruiyuan Hu Chuangye Ge +6 位作者 Liang Chu Yifei Feng Shanshan Xiao Yuhui Ma Wei Liu Xing'ao Li Mohammad Khaja Nazeeruddin 《Journal of Energy Chemistry》 SCIE EI CAS CSCD 2021年第8期581-588,I0012,共9页
Organometallic halide perovskite materials make great achievements in optoelectronic fields,especially in solar cells,in which the organic cations contain amine components.However,the amine with NàH bonds is easi... Organometallic halide perovskite materials make great achievements in optoelectronic fields,especially in solar cells,in which the organic cations contain amine components.However,the amine with NàH bonds is easily hydrolyzed with moisture in the air,weakening the perovskite materials stability.It is desirable to develop other non-amine stable perovskite materials.In this work,sulfur-based perovskite-like(CH_(3))_(3)SPbI_(3) nanorod arrays were fabricated by a solution-processed method,which can be indexed hexagonal crystal structure in the space group P63 mc.The binding force is exceptionally strong between the non-amine(CH_(3))_(3) S+and[PbI_(6)]_(4)-octahedral,leading to high stability of(CH_(3))_(3)SPbI_(3).The(CH_(3))_(3)SPbI_(3) nanorod arrays can keep the morphology and crystal structure in an ambient atmosphere over 60 days.In addition,the(CH_(3))_(3)SPbI_(3) nanorod arrays can offer direct charge transfer channels,which show excellent optoelectronic properties.The(CH_(3))_(3)SPbI_(3) nanorod arrays-based solar cells with VOx hole transfer layers achieved a power conversion efficiency of 2.07%with negligible hysteresis.And the(CH_(3))_(3)SPbI_(3) nanorod arrays were also effectively applied in photodetectors with interdigitated gold electrodes.This work demonstrates that sulfur-based perovskite-like(CH_(3))_(3)SPbI_(3) is a novel promising stable compound with great potential for practical optoelectronic applications. 展开更多
关键词 Perovskite solar cells High stability (CH_(3))_(3)SPbI_(3) nanorod arrays PHOTODETECTORS
下载PDF
Fabrication of highly oriented ZnO nanorod arrays by galvanostatic deposition 被引量:2
6
作者 YE Feng WANG Xindong YANG Zhuanyu LI Jingjing LIN Caishun WANG Tongtao 《Rare Metals》 SCIE EI CAS CSCD 2008年第5期513-516,共4页
Highly oriented ZnO nanorod arrays were successfully prepared on the indium tin oxide (ITO) substrate using a galvanostatic electrodeposition method. The ITO substrate was pretreated with ZnO nanoparticles via simpl... Highly oriented ZnO nanorod arrays were successfully prepared on the indium tin oxide (ITO) substrate using a galvanostatic electrodeposition method. The ITO substrate was pretreated with ZnO nanoparticles via simple low-temperature solution route. The crystallinity, microstructure of surface, and optical properties of the obtained ZnO were characterized by X-ray diffraction, scanning electron microscope, and transmittance spectrum. The results indicate that the average diameter of ZnO nanorod arrays is about 30 nm, and the narrow size distribution ranges from 20 to 50 nm. The nanorod arrays are growing along wavelength of incident is over 380 nm, the ZnO nanorod arrays growth mechanism of the nanorod arrays was discussed. [001] direction with an orientation perpendicular to the substrate. When the show a high optical transmission of above 95%. Furthermore, the possible 展开更多
关键词 ZnO nanorod arrays ELECTRODEPOSITION mechanism optical transmission
下载PDF
Quantitative modeling, optimization, and verification of ^(63)Nipowered betavoltaic cells based on three-dimensional ZnO nanorod arrays 被引量:2
7
作者 Zan Ding Tong-Xin Jiang +5 位作者 Ren-Rong Zheng Na Wang Li-Feng Zhang Shi-Chao Liu Xin Li Hai-Sheng San 《Nuclear Science and Techniques》 SCIE EI CAS CSCD 2022年第11期101-112,共12页
Betavoltaic cells(BCs)are promising self-generating power cells with long life and high power density.However,the low energy conversion efficiency(ECE)has limitations in practical engineering applications.Widebandgap ... Betavoltaic cells(BCs)are promising self-generating power cells with long life and high power density.However,the low energy conversion efficiency(ECE)has limitations in practical engineering applications.Widebandgap semiconductors(WBGSs)with three-dimensional(3-D)nanostructures are ideal candidates for increasing the ECE of BCs.This paper proposes hydrothermally grown ZnO nanorod arrays(ZNRAs)for ^(63)Ni-powered BCs.A quantitative model was established for simulation using the parameter values of the dark characteristics,which were obtained from the experimental measurements for a simulated BC based on a Ni-incorporated ZNRAs structure.Monte Carlo(MC)modeling and simulation were conducted to obtain the values of the β energy deposited in ZNRAs with different nanorod spacings and heights.Through the simulation and optimization of the 3-D ZNRAs and 2-D ZnO bulk structures,the performance of the ^(63)Ni-powered BCs based on both structures was evaluated using a quantitative model.The BCs based on the 3-D ZNRAs structure and 2-D ZnO bulk structure achieved a maximum ECE of 10.1%and 4.69%,respectively,which indicates the significant superiority of 3-D nanostructured WBGSs in increasing the ECE of BCs. 展开更多
关键词 Betavoltaic cells Monte Carlo simulation ZnO nanorod arrays Quantitative model Performance evaluation
下载PDF
Direct Z-scheme WO_(3-x) nanowire-bridged TiO_(2) nanorod arrays for highly efficient photoelectrochemical overall water splitting 被引量:2
8
作者 Sheng Lin He Ren +7 位作者 Zhi Wu Lan Sun Xia-Guang Zhang Yu-Mei Lin Kelvin H.L.Zhang Chang-Jian Lin Zhong-Qun Tian Jian-Feng Li 《Journal of Energy Chemistry》 SCIE EI CAS CSCD 2021年第8期721-729,I0015,共10页
All-solid-state Z-scheme photocatalysts for overall water splitting to evolve H_(2) is a promising strategy for efficient conversion of solar energy.However,most of these strategies require redox mediators.Herein,a di... All-solid-state Z-scheme photocatalysts for overall water splitting to evolve H_(2) is a promising strategy for efficient conversion of solar energy.However,most of these strategies require redox mediators.Herein,a direct Z-scheme photoelectrocatalytic electrode based on a WO_(3-x)nanowire-bridged TiO_(2)nanorod array heterojunction is constructed for overall water splitting,producing H_(2).The as-prepared WO_(3-x)/TiO_(2)nanorod array heterojunction shows photoelectrochemical(PEC)overall water splitting activity evolving both H_(2) and O_(2)under UV-vis light irradiation.An optimum PEC activity was achieved over a 1.67-WO_(3-x)/TiO_(2)photoelectrode yielding maximum H_(2) and O_(2)evolution rates roughly 11 times higher than that of pure TiO_(2)nanorods without any sacrificial agent or redox mediator.The role of oxygen vacancy in WO_(3-x)in affecting the H_(2) production rate was also comprehensively studied.The superior PEC activity of the WO_(3-x)/TiO_(2)electrode for overall water splitting can be ascribed to an efficient Z-scheme charge transfer pathway between the WO_(3-x)nanowires and TiO_(2)nanorods,the presence of oxygen vacancies in WO_(3-x),and a bias potential applied on the photoelectrode,resulting in effective spatial charge separation.This study provides a novel strategy for developing highly efficient PECs for overall water splitting. 展开更多
关键词 TiO_(2) nanorod arrays WO_(3-x) nanowire Heterostructure PHOTOELECTROCHEMICAL Hydrogen production
下载PDF
Preparation and Electrocatalytic Activity of Tungsten Carbide Nanorod Arrays 被引量:1
9
作者 Huajun ZHENG Zhenhai GU +1 位作者 dinhuan ZHONG Wei WANG 《Journal of Materials Science & Technology》 SCIE EI CAS CSCD 2007年第5期591-594,共4页
High density tungsten carbide nanorod arrays have been prepared by magnetron sputtering (MS) using the aluminum lattice membrane (ALM) as template. Electrocatalytic properties of nitromethane electroreduction on t... High density tungsten carbide nanorod arrays have been prepared by magnetron sputtering (MS) using the aluminum lattice membrane (ALM) as template. Electrocatalytic properties of nitromethane electroreduction on the tungsten carbide nanorod arrays electrode were investigated by electrochemical method, and their electrocatalytic activity is approached to that of the Pt foil electrode. 展开更多
关键词 Tungsten carbide nanorod arrays Aluminum lattice membrane Magnetron sputtering Electrocatalytlc activity
下载PDF
Direct Z-scheme CdS-CdS Nanorod Arrays Photoanode: Synthesis,Characterization and Photoelectrochemical Performance
10
作者 Yi Fan Zhi-min Song +6 位作者 Jing-jing Dong Zhi-yu Wang Yue Yang Xiao-di Zhu Song Sun Chen Gao Jun Bao 《Chinese Journal of Chemical Physics》 SCIE CAS CSCD 2019年第6期715-720,I0003,I0025-I0031,共14页
Direct Z-scheme CdO-CdS 1-dimensional nanorod arrays were constructed through a facile and simple hydrothermal process. The structure, morphology, photoelectrochemical properties and H2 evolution activity of this cata... Direct Z-scheme CdO-CdS 1-dimensional nanorod arrays were constructed through a facile and simple hydrothermal process. The structure, morphology, photoelectrochemical properties and H2 evolution activity of this catalyst were investigated systematically. The morphology of the obtained nanorod is a regular hexagonal prism with 100-200 nm in diameter. The calcination temperature and time were optimized carefully to achieve the highest photoelectrochemical performance. The as-fabricated hybrid system achieved a photocurrent density up to 6.5 mA/cm2 and H2 evolution rate of 240 μmol·cm-2·h-1 at 0 V vs. Ag/AgCl, which is about 2-fold higher than that of the bare CdS nanorod arrays. The PEC performance exceeds those previously reported similar systems. A direct Z-scheme photocatalytic mechanism was proposed based on the structure and photoelectrochemical performance characterization results, which can well explain the high separation efficiency of photoinduced carriers and the excellent redox ability. 展开更多
关键词 Direct Z-scheme CdO-CdS One-Dimensional nanorod arrays PEC performance H2 evolution rate
下载PDF
Strain relaxation and optical properties of etched In_(0.19)Ga_(0.81) N nanorod arrays on the GaN template
11
作者 张东炎 郑新和 +4 位作者 李雪飞 吴渊渊 王辉 王建峰 杨辉 《Chinese Physics B》 SCIE EI CAS CSCD 2012年第8期511-516,共6页
InGaN/GaN epilayers, which are grown on sapphire substrates by the metal-organic chemical-vapour deposition (MOCVD) method, are formed into nanorod arrays using inductively coupled plasma etching via self-assembled ... InGaN/GaN epilayers, which are grown on sapphire substrates by the metal-organic chemical-vapour deposition (MOCVD) method, are formed into nanorod arrays using inductively coupled plasma etching via self-assembled Ni nanomasks. The formation of nanorod arrays eliminates the tilt of the InGaN (0002) crystallographic plane with respect to its GaN bulk layer. Photoluminescence results show an apparent S-shaped dependence on temperature. The light extraction efficiency and intensity of photoluminescence emission at low temperature of less than 30 K for the nanorod arrays are enhanced by the large surface area, which increases the quenching effect because of the high density of surface states for the temperature above 30 K. Additionally, a red-shift for the InGaN/GaN nanorod arrays is observed due to the strain relaxation, which is confirmed by reciprocal space mapping measurements. 展开更多
关键词 InGaN/GaN nanorod arrays PHOTOLUMINESCENCE strain relaxation recombination
原文传递
A self-powered ultraviolet photodetector with van der Waals Schottky junction based on TiO_(2) nanorod arrays/Au-modulated V2CTx MXene
12
作者 Guangcan Luo Ziling Zhang +9 位作者 Yabing Wang Qun Deng Shengtao Pan Tengfei Wang Qinghong Li Kaixiang Liu Pengfei Kong Jing Zhang Shengyun Luo Hong Lin 《Journal of Materials Science & Technology》 SCIE EI CAS CSCD 2023年第25期83-91,共9页
A self-powered ultraviolet photodetector(UV PD)with van der Waals(vdW)Schottky junction based on TiO_(2) nanorod arrays/Au-modulated V2 CTx MXene is reported.The Schottky junction enables the device to operate in self... A self-powered ultraviolet photodetector(UV PD)with van der Waals(vdW)Schottky junction based on TiO_(2) nanorod arrays/Au-modulated V2 CTx MXene is reported.The Schottky junction enables the device to operate in self-powered mode.The dangling bond-free surface of V2 CTx MXene reduces the charge recombination at the junction interface.Meanwhile,V2 CTx MXene,with the work function(WF)increasing to 5.35 eV,forms a hole transport layer by contacting with Au electrode,which facilitates the carrier extraction.The electron lifetime in the device has prolonged to 8.95μs.As a result,the responsivity and detectivity of the PD have achieved 28 mA/W and 1.2×10^(11) cm Hz1/2/W(340 nm,65 mW/cm2,0 V),respectively.In addition,the presence of the Au electrode prevents the vanadium from coming into contact with oxygen and oxidizing,preserving the properties of the V2 CTx films.After 180 days of exposure to the atmosphere,the device performance remained at a particularly high level,indicating enhanced durability.This work points out an effective approach to modulate the properties of V2 CTx to obtain the high performance and stability of the UV PD. 展开更多
关键词 TiO_(2)nanorod arrays V2CT MXene Work function Ultraviolet photodetectors Device stability
原文传递
In situ growth of single-crystal TiO2 nanorod arrays on Ti substrate: Controllable synthesis and photoelectro- chemical water splitting 被引量:4
13
作者 Tingting Zhang Zia Ur Rahman +3 位作者 Ning Wei Yupeng Liu Jun Liang Daoai Wang 《Nano Research》 SCIE EI CAS CSCD 2017年第3期1021-1032,共12页
Despite one-dimensional (1D) semiconductor nanostructure arrays attracting increasing attention due to their many advantages, highly ordered TiO2 nanorod arrays (TiO2 NR) are rarely grown in situ on Ti substrates.... Despite one-dimensional (1D) semiconductor nanostructure arrays attracting increasing attention due to their many advantages, highly ordered TiO2 nanorod arrays (TiO2 NR) are rarely grown in situ on Ti substrates. Herein, a feasible method to fabricate TiO2 NRs on Ti substrates by using a through-mask anodization process is reported. Self-ordered anodic aluminum oxide (AAO) overlaid on Ti substrate was used as a nanotemplate to induce the growth of TiO2 NRs. The NR length and diameter could be controlled by adjusting anodization parameters such as electrochemical anodization voltage, anodization time and temperature, and electrolyte composition. Furthermore, according to the proposed NR formation mechanism, the anodized Ti ions migrate and deposit in the AAO nanochannels to form Ti(OH)4 or amorphous TiO2 NRs under electric field, owing to the confinement effect of the template. Photoelectrochemical tests indicated that, after hydrogenation, the TiO2 NRs presented higher photocurrent density under simulated sunlight and visible light illuminations, suggesting their potential use in photoelectrochemical water splitting, photocatalysis, solar cells, and sensors. 展开更多
关键词 HYDROGENATION TiO2 nanorod arrays in situ preparation through-hole anodic alu-minum oxide (AAO) mask PHOTOELECTROCHEMICAL
原文传递
Uniform and reproducible plasmon-enhanced fluorescence substrate based on PMMA-coated, large-area Au@Ag nanorod arrays 被引量:4
14
作者 Jun Sun Ziyang Li +6 位作者 Yinghui Sun Liubiao Zhong Jing Huang Junchang Zhang Zhiqiang Liang Jianmei Chen Lin Jiang 《Nano Research》 SCIE EI CAS CSCD 2018年第2期953-965,共13页
Here we describe a plasmon-enhanced fluorescence substrate based on poly(methyl methacrylate) (PMMA)-coated, large-area Au@Ag nanorod arrays. The use of a PMMA medium enables precise control of the competition bet... Here we describe a plasmon-enhanced fluorescence substrate based on poly(methyl methacrylate) (PMMA)-coated, large-area Au@Ag nanorod arrays. The use of a PMMA medium enables precise control of the competition between enhancing and quenching processes as a function of the distance between Au@Ag nanorods and dye molecules. At the optimal PMMA layer thickness of 56 nm (for which the distance between nanopartides and dye molecules is 16 nm), a maximum enhancement of fluorescence of up to N 27 times is measured. The competition mechanism between enhancing and quenching processes depends on the thickness of the PMMA layer, which has been confirmed by consistent experimental and theoretical modeling results. Notab136 the micropatterned metal-enhanced fluorescence (MEF) substrate exhibits high uniformity and reproducibility. The simple spin-coating process described herein provides an attractive, scalable, and low-cost strategy to produce uniform and reproducible large-area MEF substrates that can potentially be used in many fields, such as biochips, diagnostics, and photonics. 展开更多
关键词 Au@Ag nanorod arrays metal-enhancedfluorescence (MEF) poly(methyl methacrylate)(PMMA) layer micro patterning localized surface plasmonresonance (LSPR)
原文传递
Free-standing ZnO nanorod arrays modified with single-walled carbon nanotubes for betavoltaics and photovoltaics 被引量:3
15
作者 Changsong Chen Jiang Chen +5 位作者 Zhen Wang Jian Zhang Haisheng San Shichao Liu Chunyu Wu Werner Hofmann 《Journal of Materials Science & Technology》 SCIE EI CAS CSCD 2020年第19期48-57,共10页
A full-duplex radiant energy converter based on both betavoltaic and photovoltaic effects in an easyto-implement way is an attractive alternative for the autonomous wireless sensor microsystem.Here,we report a novel b... A full-duplex radiant energy converter based on both betavoltaic and photovoltaic effects in an easyto-implement way is an attractive alternative for the autonomous wireless sensor microsystem.Here,we report a novel beta/photovoltaic cell based on free-standing Zn O nanorod arrays(ZNRAs)modified with metallic single-walled carbon nanotubes(m-SWCNTs),using radioisotope63 Ni as beta-emitting source.The ZNRAs were grown on Al-doped Zn O(AZO)conductive glass using hydrothermal method.The optimum length and diameter of Zn O nanorods were determined by Monte Carlo simulation for beta energy deposition in ZNRAs.The m-SWCNTs were anchored into the ZNRAs to form a three-dimensional(3-D)Schottky junction structure for effectively separating the beta/photo-excited electron-hole pairs.Experimentally,the betavoltaic and photovoltaic effects were confirmed through the I-V measurements of beta/photovoltaic cells under beta/UV/Vis irradiations,respectively.It is suggested that the m-SWCNTs play key role for the enhancement of beta/photovoltaic performance through the formation of extensive3-D Schottky junction,the conductive network for hole transport,and the surface plasmon resonance exciton absorption for visible light. 展开更多
关键词 ZnO nanorod arrays Single-walled carbon nanotube Betavoltaics Photovoltaics
原文传递
Enhanced light harvesting and electron collection in quantum dot sensitized solar cells by TiO_2 passivation on ZnO nanorod arrays 被引量:1
16
作者 赵海峰 吴强 +4 位作者 侯娟 曹海宾 井群 吴荣 刘志勇 《Science China Materials》 SCIE EI CSCD 2017年第3期239-250,共12页
Light capture and electron recombination are the essential processes that determine power conversion efficiency (PCE) in quantum dot sensitized solar cells (QD- SCs). It is well known that charges are easily trans... Light capture and electron recombination are the essential processes that determine power conversion efficiency (PCE) in quantum dot sensitized solar cells (QD- SCs). It is well known that charges are easily transported in well-built QDSCs based on nauorod arrays. However, this advantage can be drastically weakened by defects located at the zinc oxide (ZnO) array surface which permit faster electron recombination. Hence, we developed a composite nanostructure consisting of ZnO nanorods coated with orthorhombic configuration titanium dioxide (TiO2) nanopartides, which were synthesized using a solution of H3BO3 and (NH4)2TiF6. This composite nanostructure was designed to take the advantage of the enlarged surface area provided by the nanoparticles and improved electron transport along the nanorods, in order to yield good charge transport and light harvesting. At the same time, the TiO2/ZnO nanorod arrays have fewer recombination centers (hydroxyl groups) after TiO2 modification, which results in fewer electron trapping events at the ZnO nanorod surface; thereby, a reduced charge recombination and longer electron lifetime can be achieved. As a result, the PCE of the QDSCs with TiO2-nanopartides-decorated ZnO nanorod arrays photoelectrode reaches 4.8%, which is ~78% higher efficiency compared to 2.7% for solar cells without modification. 展开更多
关键词 TiO2 nanoparticles ZnO nanorod arrays quantum dot sensitized solar cells
原文传递
Effect of Substrate Pretreatment on Controllable Growth of TiO_2 Nanorod Arrays
17
作者 Minjiang Cao Yuxiang Li +2 位作者 Min Guo Mei Zhang Xidong Wang 《Journal of Materials Science & Technology》 SCIE EI CAS CSCD 2012年第7期577-586,共10页
Well-aligned TiO2 nanorod arrays (TNAs) were prepared on the pretreated quartz substrates. The effect of the pretreatment conditions on the growth of TNAs was systematically investigated by X-ray diffraction (XRD)... Well-aligned TiO2 nanorod arrays (TNAs) were prepared on the pretreated quartz substrates. The effect of the pretreatment conditions on the growth of TNAs was systematically investigated by X-ray diffraction (XRD), field-emission scanning electron microscopy (FE-SEM) and high-resolution transmission electron microscopy (HRTEM). It is demonstrated that the pre-coating TiO2 crystal seeds on the substrates can greatly improve the growth orientation of TNAs. Rutile Ti02 crystal seeds induce the nucleation and growth of TNAs more preferably than the anatase TiO2 seeds. The growth density and diameter distribution of TNAs strongly depend on the TiO2 crystal seeds density. It is proved that TNAs with different morphologies can be controllably synthesized by using hydrothermal approach by pretreating substrates. The photocatalytic activity of TNAs was investigated by measuring the photodegradation rate of methyl blue aqueous solution under UV irradiation (254 nm). And the results show that TNAs with large growth density and small diameter size exhibit relatively higher photocatalytic activity. 展开更多
关键词 Titanium dioxide nanorod arrays Hydrothermal synthesis Photocatalytic properties
原文传递
Enhancement of mass transfer efficiency and photoelectrochemical activity for TiO_(2)nanorod arrays by decorating Ni^(3+)-states functional NiO water oxidation cocatalyst
18
作者 Ningchao Zheng Xi He +1 位作者 Weiqing Guo Zhuofeng Hu 《Chinese Chemical Letters》 CSCD 2021年第6期1993-1997,共5页
Photoelectrochemical(PEC)water splitting is a promising technology to use solar energy.However,current metal oxides photoanode face the problem of sluggish water oxidation kinetic.In this study,we propose that the slu... Photoelectrochemical(PEC)water splitting is a promising technology to use solar energy.However,current metal oxides photoanode face the problem of sluggish water oxidation kinetic.In this study,we propose that the sluggish water oxidation process will cause slow mass transfer efficiency,which are rarely considered previously,especially at large bias and strong illumination.Mass transfer refers to the migration of reactants(like H_(2)O and OH^(-))to the photoanode surface,reaction with holes and diffusion of products(like radical and O^(2))to the bulk of the electrode.If the migration and diffusion are not fast enough,the mass transfer will inhibit the increase of PEC activity.This problem will be more apparent for nanorod arrays(NRAs),where the space among the NRAs is related narrow.Herein,we solve this problem by decorating the surface of the photoanode by NiO clusters with Ni3+state as water oxidation cocatalysts.This work studies the PEC process from the viewpoint of mass transfer and firstly demonstrates that mass transfer in NRAs structure can be promoted by using Ni-based water oxidation cocatalyst. 展开更多
关键词 TiO_(2) nanorod arrays NiO cluster COCATALYST Mass transfer Photoelectrochemical performance
原文传递
A facile solution processed ZnO@ZnS core–shell nanorods arrays for high-efficiency perovskite solar cells with boosted stability 被引量:2
19
作者 Kun Chen Weijian Tang +4 位作者 Yu Chen Ruihan Yuan Yinhua Lv Wenjuan Shan Wen-Hua Zhang 《Journal of Energy Chemistry》 SCIE EI CAS CSCD 2021年第10期553-560,I0014,共9页
Zinc Oxide(ZnO)has been extensively applied as electron transport material(ETM)in perovskite solar cells(PSCs)since the emergence of PSCs.However,some chemisorbed oxygen species on the surface of ZnO can cause the deg... Zinc Oxide(ZnO)has been extensively applied as electron transport material(ETM)in perovskite solar cells(PSCs)since the emergence of PSCs.However,some chemisorbed oxygen species on the surface of ZnO can cause the degradation of CH3NH3+(MA^(+))based perovskite.To avoid the destructive effect of ZnO,a facile solution strategy was proposed to produce a ZnS shell around the ZnO nanorods arrays(ZnO-NRs),i.e.ZnO@ZnS core-shell nanorods(ZnO-NRs@ZnS).The ZnO-NRs@ZnS cascade structure can not only facilitate carrier transport,but also enhance the stability of ZnO based PSCs.A power conversion efficiency(PCE)of 20.6%was finally yielded,which is the-state-of-the-art efficiency for PSCs with one-dimensional(1 D)ZnO electron transport materials(ETMs).Moreover,over 90%of the initial efficiency was retained for the unencapsulated device with ZnO-NRs@ZnS ETMs at 85℃for 500 h,demonstrating excellent stability.This work provides a simple and efficient avenue to simultaneously enhance the photovoltaic(PV)performance and stability of 1 D ZnO nanostructure-based PSCs. 展开更多
关键词 Zinc Oxide nanorods arrays Core-cell structure Electron transport material Perovskite solar cells STABILITY
下载PDF
Hybrid UV photodetector with high photo-to-dark current ratio based on ordered TiO_2 nanorod arrays and polystyrene sulfate 被引量:2
20
作者 ZHENG WenJi HE GaoHong +1 位作者 LI XiangCun YAN XiaoMing 《Science China(Technological Sciences)》 SCIE EI CAS 2013年第11期2642-2645,共4页
Vertically aligned TiO2nanorods arrays were successfully synthesized on FTO glass by wet-chemical method.Based on polystyrene sulfate(PSS)functionalized TiO2nanorods arrays,a sandwich-structured hybrid UV photodetecto... Vertically aligned TiO2nanorods arrays were successfully synthesized on FTO glass by wet-chemical method.Based on polystyrene sulfate(PSS)functionalized TiO2nanorods arrays,a sandwich-structured hybrid UV photodetector was fabricated.The photo-to-dark current ratio of the device increases by more than 3 orders of magnitude with typical case,while the dark current is about 10 nA at 1 V bias.The high photoresponse together with the low dark current could probably contribute a large photocurrent and low-power application.The high performance of the hybrid material and facile low-cost fabrication of the UV detector make the devices promising for large-area UV photodetection applications. 展开更多
关键词 TiO2 nanorods arrays UV photodetector polystyrene sulfate (PSS) functionalized
原文传递
上一页 1 2 下一页 到第
使用帮助 返回顶部