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Oxidative Desulfurization of Fuel Oil at Room Temperature Catalyzed by Ordered Meso-macroporous HPW/SiO2 被引量:5
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作者 GUO Zhenran LEI Jiaheng DU Yue 《Journal of Wuhan University of Technology(Materials Science)》 SCIE EI CAS 2019年第5期1071-1076,共6页
A serial of ordered meso-macroporous phosphotungstic acid(HPW) supported on SiO2 nanocomposites were successfully prepared by a homogeneous precipitation method, using monodispersed polystyrene(PS) microspheres and ca... A serial of ordered meso-macroporous phosphotungstic acid(HPW) supported on SiO2 nanocomposites were successfully prepared by a homogeneous precipitation method, using monodispersed polystyrene(PS) microspheres and cationic surfactant as structure directing agent. These nanocomposites were used as catalysts for oxidative desulfurization(ODS) of model fuel. The materials were characterized by scanning electron microscopy(SEM), transmission electron microscopy(TEM), N2 adsorption-desorption isothrem, X-ray diffraction(XRD), and Fourier transform infrared spectra(FTIR). The characterization results suggested that the as-prepared material possessed ordered meso-macroporous architectures with Keggin type phosphotungstic acid dispersed homogeneously in SiO2 matrix. Under the selected reaction conditions, dibenzothiophene(DBT) in model fuel can be removed within 2 h at room temperature(30 ℃). In addition, only 1.2% of efficiency lose than the fresh catalyst even after 5 cycles. 展开更多
关键词 room temperature ordered meso-macroporous sio2 KEGGIN HETEROPOLYACIDS oxidative desulfurization
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Three-dimensionally Ordered Macroporous Phosphotungstic Acid/SiO2 for Efficient Catalytic Oxidative Desulfurization 被引量:3
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作者 杜岳 YANG Peng +3 位作者 雷家珩 ZHOU Shiyu LI Junsheng DU Xiaodi 《Journal of Wuhan University of Technology(Materials Science)》 SCIE EI CAS 2018年第4期849-854,共6页
Three-dimensionally ordered(3DOM) macroporous phosphotungstic acid/SiO_2(HPW/SiO_2) materials were prepared by using colloidal crystal as templates and applied for oxidative desulfurization(ODS) of the model fue... Three-dimensionally ordered(3DOM) macroporous phosphotungstic acid/SiO_2(HPW/SiO_2) materials were prepared by using colloidal crystal as templates and applied for oxidative desulfurization(ODS) of the model fuel oil. The obtained HPW/SiO_2 materials were characterized through scanning electron microscopy, powder X-ray diffraction, N_2 sorption, and Fourier transform infrared spectroscopy. The results indicated that 3 DOM HPW/SiO_2 possessed hierarchical pore architectures which contained ordered macropores and disordered mesopores, with the Keggin type HPW embedded in the framework of pore structure. The removal rate of dibenzothiophene(DBT) could reach 100% under the optimum conditions, moreover. The performance was only slightly decreased for the regenerated catalyst after 7 cycles. 展开更多
关键词 three-dimensionally ordered macroporous sio2 phosphotungstic acid oxidativedesulfurization
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Controlling Shell Thickness of PS/SiO_2 Core-Shell Particles and Their Crystallization into 3-D Ordered Thin Film 被引量:1
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作者 武晓峰 陈运法 +1 位作者 魏连启 王奇 《过程工程学报》 CAS CSCD 北大核心 2006年第z2期285-289,共5页
PS/SiO2 particles with core-shell structure were synthesized by coating silica on surface of polystyrene(PS) colloidal particles.The reaction parameters,such as initial tetraethyl orthosilicate(TEOS) concentration,wat... PS/SiO2 particles with core-shell structure were synthesized by coating silica on surface of polystyrene(PS) colloidal particles.The reaction parameters,such as initial tetraethyl orthosilicate(TEOS) concentration,water concentration and reaction temperature,have been investigated to control the thickness of silica shells.The shell thickness was prepositional to the square root of the initial concentration of TEOS and first increased with increasing water concentration,reached a maximum at about 2.0 mol/L and then started decreasing beyond that concentration.It was also found that the shell thickness decreased firstly with the reaction temperature added,then tended to a constant.The so-synthesized PS/SiO2 core-shell particles were directly crystallized into 3-D ordered thin film,then sintered at 570℃ into the ordered macroporous thin film.Compared with the conditional method,the present approach avoids repeatedly filling the precursor in the templetes and save time more. 展开更多
关键词 PS/sio2 CORE-SHELL PARTICLES ordered THIN film
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A Method for Preparation of Ordered Porous Silicon Based on a 2D SiO_2 Template
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作者 吴英 翟晓霞 +3 位作者 甄聪棉 刘晓伟 马丽 侯登录 《Chinese Physics Letters》 SCIE CAS CSCD 2016年第5期127-130,共4页
A new method for fabricating ordered porous silicon is reported. A two-dimensional silica nanosphere array is used as a template with a hydrofluoric acid-hydrogen peroxide solution for etching the nanospheres. The ini... A new method for fabricating ordered porous silicon is reported. A two-dimensional silica nanosphere array is used as a template with a hydrofluoric acid-hydrogen peroxide solution for etching the nanospheres. The initial diameter and distribution of the holes in the resulting porous silicon layer are determined by the size and distribution of the silica nanospheres. The corrosion time can be used to control the depths of the holes. It is found that the presence of a SiO2 layer, formed by the oxidation of the rough internal surface of the hole, is the primary reason allowing the corrosion to proceed. Ultraviolet reflection and thermal conductivity measurements show that the diameter and distribution of the holes have a great influence on properties of the porous silicon. 展开更多
关键词 of is as A Method for Preparation of ordered Porous Silicon Based on a 2D sio2 Template for in sio that were on
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PROGRESS IN THREE-DIMENSIONALLY ORDERED SELF-ASSEMBLY OF COLLOIDAL SiO2 PARTICLES 被引量:1
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作者 QianZhou PengDong BingyingCheng 《China Particuology》 SCIE EI CAS CSCD 2003年第3期124-130,共7页
Three-dimensionally ordered self-assembly of monodispersed colloidal SiO2 particles involving a structure with periodic alternation of refractive indices represents an advanced field of particuology, colloidal chemist... Three-dimensionally ordered self-assembly of monodispersed colloidal SiO2 particles involving a structure with periodic alternation of refractive indices represents an advanced field of particuology, colloidal chemistry, materials science, optical physics and information science. Study on such self-assembly not only lays the foundation for the development of advanced functional materials, but also is significant in understanding the principles of nano- and micro-scale processes. Recent progress in three-dimensionally ordered self-assembly of colloidal SiO2 particles is reviewed, inclusive of the authors investigations. 展开更多
关键词 colloidal sio2 particles ordered self-assembly colloidal crystals photonic crystals
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SiO_2胶体颗粒的三维有序自组装 被引量:13
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作者 周倩 董鹏 程丙英 《化学通报》 CAS CSCD 北大核心 2004年第4期290-294,共5页
由 Si O2 胶体颗粒的三维有序自组装可以得到面心立方三维结构 ,它具有折射率周期性变化的特点。它的制备涉及胶体化学、材料科学等学科的前沿领域。其自组装方法包括胶体颗粒的沉降自组装、胶体颗粒在物体限制下的自组装、胶体颗粒的... 由 Si O2 胶体颗粒的三维有序自组装可以得到面心立方三维结构 ,它具有折射率周期性变化的特点。它的制备涉及胶体化学、材料科学等学科的前沿领域。其自组装方法包括胶体颗粒的沉降自组装、胶体颗粒在物体限制下的自组装、胶体颗粒的连续对流自组装和利用胶体颗粒表面电性质的自组装。本文对这些组装方法进行了介绍。 展开更多
关键词 二氧化硅胶体颗粒 三维有序自组装 折射率 沉降 面心立方三维结构 连续对流自组装
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Immobilization of Glucose Oxidase on Ordered Macroporous Silicas Functionalized with Amino Group 被引量:2
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作者 Wu,Quanzhou He,Jianfeng +1 位作者 Zhang,Jingjia Ou,Jiming 《Chinese Journal of Chemistry》 SCIE CAS CSCD 2012年第2期283-287,共5页
A novel glucose oxidase immobilized on three-dimensionally ordered macroporous (3DOM) material has been prepared by firstly preparation of hybrid 3DOM SiO2-NH2 materials using colloidal crystal method, and following... A novel glucose oxidase immobilized on three-dimensionally ordered macroporous (3DOM) material has been prepared by firstly preparation of hybrid 3DOM SiO2-NH2 materials using colloidal crystal method, and following covalent immobilization of glucose oxidase on the pore walls of the 3DOM materials. The materials were characterized by SEM, FTIR, DSC and BET techniques. SEM observation shows that the macropores are highly ordered and are interconnected by small windows. FTIR measurement shows that there are amino and organic groups in the pore walls. The surface area of the 3DOM SiO2-NH2 material is about 10.2 m2/g. The loaded amount of enzyme is increased with amino content in the materials. The immobilized enzyme has high activity, thermal stability and can be reused. 展开更多
关键词 three-dimensionally ordered macropore sio2 glucose oxidase supported catalyst materials science
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Adsorption of Methyl Orange on Magnetically Separable Mesoporous Titania Nanocomposite 被引量:1
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作者 高立波 张强 +3 位作者 李俊漾 冯瑞婷 徐宏妍 薛晨阳 《Chinese Journal of Chemical Engineering》 SCIE EI CAS CSCD 2014年第10期1168-1173,共6页
The adsorption of mesoporous Fe3O4–SiO2–TiO2(MFST), which can be separated easily from solution by a magnet, for the removal of methyl orange(MO) was investigated. The nitrogen adsorption–desorption measurement sho... The adsorption of mesoporous Fe3O4–SiO2–TiO2(MFST), which can be separated easily from solution by a magnet, for the removal of methyl orange(MO) was investigated. The nitrogen adsorption–desorption measurement shows successful synthesis of MFST with an average pore size of 3.8 nm and a large specific surface area of55 m2·g-1. About 95% adsorption percentage of MO is achieved with an initial concentration of 10 mg·L-1in the dark and the MFST exhibits superior adsorption ability under acid conditions. The adsorption data fit well with the pseudo-second order model for adsorption. After 4 cycles, the adsorption rate for MO remains 74% in the dark and the MFST can be recovered in a magnetic field with a recovery of about 80 %(by mass). It demonstrates that the samples have significant value on applications of wastewater treatment. 展开更多
关键词 MESOPOROUS Fe3O4–sio2–TiO2 ADSORPTION METHYL ORANGE Pseudo-second order model
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Sharp scattering spectra induced brilliant and directional structural colors 被引量:2
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作者 Zhipeng Meng Yue Wu +1 位作者 Shufen Zhang Suli Wu 《Science China Materials》 SCIE EI CSCD 2021年第2期420-429,共10页
Structural color materials,which generate colors through the interaction between light and nano-microstructures,have always been research hotspots in the fields of display,anticounterfeiting and stimuli-responsive mat... Structural color materials,which generate colors through the interaction between light and nano-microstructures,have always been research hotspots in the fields of display,anticounterfeiting and stimuli-responsive materials.Structural colors based on scattering have received increasing attention due to their wider viewing angles than that originating from the specular reflection of photonic crystals.However,the wide scattering spectrum of an amorphous structure leads to lower purity and brightness of the appeared colors.Few researchers have focused on the scattering of ordered structures due to their strong reflection and diffraction in the visible regions.In this work,by building ordered films(OFs)using SiO2 spheres(refractive index n=1.46)with a diameter of 300–500 nm,for the first time,sharp scattering spectra with narrow full width at half-maximum(FWHM,24 nm)were generated.Importantly,under ambient light,brilliant colors covering the entire visible region can be observed,and a formula was proposed to calculate the scattering spectra of OFs.Moreover,rainbow structural color was realized under irradiation of the nonparallel light,and full-spectrum structural color patterns were fabricated using building blocks with a single particle size by a spraying method.Finally,a composite structure was constructed to explore possibilities in the field of flexible transparent displays. 展开更多
关键词 sharp scattering structural colors sio2 spheres transparent display ordered or disordered assembly
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