Colorimetric sensing strategies as a powerful point-of-care testing(POCT) tool have attracted significant interest in various chem/biosensing applications.Taking the excellent bare-eye-detectable signaling feature,nan...Colorimetric sensing strategies as a powerful point-of-care testing(POCT) tool have attracted significant interest in various chem/biosensing applications.Taking the excellent bare-eye-detectable signaling feature,nanozymes-based colorimetric sensors enable more potential applications and have been a new forefront in the colorimetric POCT analysis toward different target analytes.However,the low catalytic activity of nanozymes in most cases limits their practical application.Recent efforts demonstrate that the aggregation-induced nanozymes provide a general means to modulate nanozymes activity and enhance colorimetric sensing performances of some nanozymes-based colorimetric sensors.But there are few reports are explored to discuss and review such aggregation-induced nanozymes and their colorimetric sensing applications.To highlight the advances and progress in aggregation-induced nanozymes based colorimetric assays,we herein summary the fundamentals,classify and applications of this newlydeveloping field,focusing on the aggregation-induced activity enhancement of nanozymes(AIAEnanozymes) with a significant "signal-on" feature and aggregation-induced activity inhibition of nanozymes(AIAI-nanozymes) with a dramatical "signal-of" characteristics.Finally,we also propose the current challenges and the future prospects on both AIAE-nanozymes and AIAI-nanozymes.展开更多
The metal—organic frameworks(MOFs)are expected as ideal biomimetic enzymes for colorimetric glucose detection because of their large surface areas,well defined pore structures,tunable chemical composition,and multi-f...The metal—organic frameworks(MOFs)are expected as ideal biomimetic enzymes for colorimetric glucose detection because of their large surface areas,well defined pore structures,tunable chemical composition,and multi-functional sites.However,the intrinsically chemical instability and low mimetic enzyme activity of MOFs hinder the application of them in imitating the enzyme reactions.In this work,we demonstrated a metal-MOF synergistic catalysis strategy,by loading Pt nanoparticles(Pt NPs)on MIL-88B-NH2(Fe-MOF)to increase peroxidase-like activity for the detection of glucose.The induced electrons transfer from Pt atom to Fe atom accelerated the redox cycling of Fe^(3+)/Fe^(2+),improved the overall efficiency of the peroxidase-like reaction,and enabled the efficient and robust colorimetric glucose detection,which was proved by both experiments and density functional theory(DFT)calculation.Additionally,the sensitivity and chemical stability of this synergistic effect strategy to detect the glucose are not affected by the complex external factors,which represented a great potential in fast,easy,sensitive,and specific recognition of clinical diabetes.展开更多
In this work,the chitosan and N-doped graphene natively grown on hierarchical porous carbon(N-PC-G/CS) nanocomposite was obtained by ultrasonic method,as a novel sensor platform for determination of tartrazine(TT).The...In this work,the chitosan and N-doped graphene natively grown on hierarchical porous carbon(N-PC-G/CS) nanocomposite was obtained by ultrasonic method,as a novel sensor platform for determination of tartrazine(TT).The nanocomposite as prepared had well dispersivity in water and excellent conductivity.The N-PC-G/CS nanocomposite was characterized by scanning electron microscopy(SEM),transmission electron microscopy(TEM),nitrogen adsorption-desorption,fourier transform infrared(FTIR) and electrochemical impedance spectroscopy(EIS).The application of N-PC-G/CS for determination of tartrazine(TT) was investigated by chronocoulometry(CC),cyclic voltammetry(CV) and differential pulse voltammetry(DPV).Under optimized conditions,the sensor displayed a sensitive response to TT within a wide concentration range of 0.05-15.0 μmol/L,the detection limits is 0.036 μmol/L(S/N = 3).Furthermore,this nanocomposite could be efficiently applied for determination of TT in soft drink samples.展开更多
A novel flower-shaped zeolitic imidazolate framework(ZIF) doped organic-inorganic hybrid monolithic column(ZIF-HMC) was prepared by a simple sol-gel "one-step" method and utilized for efficient capillary mic...A novel flower-shaped zeolitic imidazolate framework(ZIF) doped organic-inorganic hybrid monolithic column(ZIF-HMC) was prepared by a simple sol-gel "one-step" method and utilized for efficient capillary microextraction(CME) of four brominated flame retardants.The prepared monolithic was characterized by Fourier transform infrared,scanning electron microscopy,X-ray photoelectron spectroscopy,energy disperse spectroscopy,and N_(2) adsorption-desorption.The parameters of CME were optimized by orthogonal array design.Under the optimal conditions,the ZIF-HMC showed excellent extraction efficiency,the limit of detection(LODs) and the limit of quantification(LOQs) were in the range of0.52$3.1 mg/L and 1.7$10 mg/L,respectively,and the proposed method demonstrated good recovery(88.8%–116.6%) with the RSD less than 13.6% and a reusability of at least 30 times.The ZIF-HMC possessed great potential for separating organic pollutants and the strategy used here could be extended to prepare other derivatized HMC functionalized monoliths.展开更多
How water layer adsorbed on solid surface under ambient conditions affects the interfacial friction is a fundamental question for understanding the friction and lubrication phenomena in practical system.We investigate...How water layer adsorbed on solid surface under ambient conditions affects the interfacial friction is a fundamental question for understanding the friction and lubrication phenomena in practical system.We investigate the formation of ice-like(IL)water layers on the hydrophobic surface of graphite with partially covered MoO_(3)nanoflakes(NFs)using atomic force microscopy(AFM)based techniques.The IL water layers are found surrounding the MoO_(3)NFs and also intercalated at the MoO_(3)/graphite interface,as proved by thickness measurements as well as local adhesion force and surface potential mappings.AFM manipulations carried out on MoO_(3)NFs on graphite show that the presence of the IL water layers increases the frictional resistance of the interface.Comparing the results on continuous and discontinuous IL water layers,we can identify the different sliding interfaces in the two scenarios.The increased friction for MoO_(3)NFs sliding on graphite with an intercalated water layer is attributed to the energy dissipation originated from the metastable nature of the IL layers.展开更多
A novel three-dimensional (3D) layered MoS2@graphene functionalized with nitrogen-doped graphene quantum dots (MoS2@N-GQDs-GR) composites as an enhanced electrochemical hydrogen evolution catalyst. The few layered MoS...A novel three-dimensional (3D) layered MoS2@graphene functionalized with nitrogen-doped graphene quantum dots (MoS2@N-GQDs-GR) composites as an enhanced electrochemical hydrogen evolution catalyst. The few layered MoS2 nanoflowers supported on N-GQDs-GR surface were elaborately fabricated by one-pot hydrothermal method, which MoS2 and N-GQDs-GR exist in a bonding manner of Mo-N. In addition, due to the layered MoS2 sheet edge exposes more hydrogen evolution active sites and N-GQDs-GR have high conductivity, the composites exhibit prominent electrocatalytic activity with a low overpotential 99 mV, a small Tafel slope 49.3 mV/dec. Therefore, that the current work will develop HER catalysts may replace Pt.展开更多
The morphology and size of Pt-based bimetallic alloys are known to determine their electrocatalytic performance in reactions relevant to fuel cells.Here,we report a general approach for preparing Pt-M(M=Fe,Co and Ni)b...The morphology and size of Pt-based bimetallic alloys are known to determine their electrocatalytic performance in reactions relevant to fuel cells.Here,we report a general approach for preparing Pt-M(M=Fe,Co and Ni)bimetallic nano-branched structure(NBs)by a simple high temperature solution-phase synthesis.As-prepared Pt-M NBs show a polycrystalline structure and are rich in steps and kinks on the surface,which promote them favorable bifunctional catalytic properties in acidic electrolytes,specifically in terms of the oxygen reduction reaction(ORR)and methanol oxidation reaction(MOR).Specially,Pt-Co NBs/C catalyst shows 6.1 and 5.3 times higher in specific activity(SA)and mass activity(MA)for ORR than state-of-the-art commercial Pt/C catalysts,respectively.Moreover,it exhibits a loss of 4.0%in SA and 14.4%in MA after 10,000 cycles of accelerated durability tests(ADTs)compared with the initial activities.In addition,we also confirmed the superior MOR activity of Pt-Co NBs/C catalyst in acidic electrolytes.For Pt-M NBs with other alloying metals,the ORR and MOR activities are both higher than commercial catalysts and are in the sequence of Pt-Co/C>Pt-Fe/C>Pt-Ni/C>commercial Pt/C(or PtRu/C).The improved activities and durability can benefit from the morphological and compositional effects.This synthesis approach may be applied to develop bifunctional catalysts with enhanced ORR and MOR properties for future fuel cells designs.展开更多
High entropy alloys(HEAs),which is at the expense of high cost compared to traditional alloy,should not be confined to the mechanical properties,but should be employed to devise a novel combination with unique functio...High entropy alloys(HEAs),which is at the expense of high cost compared to traditional alloy,should not be confined to the mechanical properties,but should be employed to devise a novel combination with unique functional and mechanical performances.In this work,high entropy alloy nitride(HEAN)is utilized as a novel double absorption layer to improve solar absorption in the high temperature solar selective absorbing coatings(SSACs).Our primary motivation is to lower thermal emittance(ε)and enhance solar absorptance(a).In order to realize this goal,coating design(CODE)software is employed to design and optimize the proposed HEAN based SSACs using appropriate dielectric function model.The ultimate as-deposited coating shows good optical properties with a high a value of 0.965 and a lowεvalue of 0.086(at 82C).The estimate of thermal stability tests indicates that HEAN based SSACs has the ability to resist instability in high working temperature,which keeps good optical properties(a¼0.925,ε¼0.070)after annealing at 600C for 10 h.展开更多
Regulating Lewis acid sites with well-defined electronic state and steric environment is still challenging for achieving high catalytic efficiency.Here we show coordinating zirconium nodes in the typical metal-organic...Regulating Lewis acid sites with well-defined electronic state and steric environment is still challenging for achieving high catalytic efficiency.Here we show coordinating zirconium nodes in the typical metal-organic framework known as MOF-545 with the monocarboxylate modulators including trifluoroacetic acid(TFA)or benzoic acid(BA)over meso-tetra(4-carboxyphenyl)-porphine(H_(2)TCPP),denoted as MOF-545-TFA or MOF-545-BA.Impressively,MOF-545-TFA shows the significantly enhanced performance for the catalytic ring-opening reaction of various epoxides with alcohols and good recyclability at 40°C in respect with MOF-545-BA and ZrO_(2).This mainly originates from the stronger Lewis acidity and more active zirconium sites induced by the electron-withdrawing TFA,resulting in the increased ability for activation of epoxides.This modulation approach is promising for enlarging the toolbox to extend the MOFs-based Lewis acid catalysis.展开更多
With the development of new materials and technology,high entropy alloy(HEA)nitride films have attracted much attention of researchers due to their excellent optical properties and mechanical properties.Herein,a novel...With the development of new materials and technology,high entropy alloy(HEA)nitride films have attracted much attention of researchers due to their excellent optical properties and mechanical properties.Herein,a novel SS/NbMoTaWN(HEAN)/NbMoTaWON(HEAON)/SiO_(2) coatings are prepared,which shows a high spectral selectivity of a/ε=0.944/0.12.The preparation and optimization of the coating are studied by combining experiments with ellipsometric program and CODE software.High temperature thermal stability test is performed in depth,which proves that the coating could bear 400℃ in air for 2 h,and 600℃for 2 h in vacuum.Long-term thermal stability researches indicate that the SSACs still keep good optical properties(a=0.902,ε=0.106)even after annealing at 600℃ for 100 h.The failure mechanism is analyzed by XRD and Raman spectra.In addition,neutral salt spray test is performed to investigate the anti-corrosion ability,which indicates the coating has a good optical performance after soaking in 3.5 wt%NaCl solution for 30 days.Obviously,this work provides a new strategy to construct solar absorber coatings based on NbMoTaW high entropy alloy.展开更多
基金the National Natural Science Foundation of China(Nos.21765013,21665023)Key Talent Project of Gansu Province,“Feitian Scholar”Program of Gansu Province,and the Research Projects of Universities in Gansu Province(No.2017A115)for financially supporting this research。
文摘Colorimetric sensing strategies as a powerful point-of-care testing(POCT) tool have attracted significant interest in various chem/biosensing applications.Taking the excellent bare-eye-detectable signaling feature,nanozymes-based colorimetric sensors enable more potential applications and have been a new forefront in the colorimetric POCT analysis toward different target analytes.However,the low catalytic activity of nanozymes in most cases limits their practical application.Recent efforts demonstrate that the aggregation-induced nanozymes provide a general means to modulate nanozymes activity and enhance colorimetric sensing performances of some nanozymes-based colorimetric sensors.But there are few reports are explored to discuss and review such aggregation-induced nanozymes and their colorimetric sensing applications.To highlight the advances and progress in aggregation-induced nanozymes based colorimetric assays,we herein summary the fundamentals,classify and applications of this newlydeveloping field,focusing on the aggregation-induced activity enhancement of nanozymes(AIAEnanozymes) with a significant "signal-on" feature and aggregation-induced activity inhibition of nanozymes(AIAI-nanozymes) with a dramatical "signal-of" characteristics.Finally,we also propose the current challenges and the future prospects on both AIAE-nanozymes and AIAI-nanozymes.
基金This work was supported by National Natural Science Foundation of China(Nos.21705117,21575115,21904095,and 22004089)Program of Tianjin Science and Technology Major Project and Engineering(No.19ZXYXSY00090)+3 种基金the Program for Chang Jiang Scholars and Innovative Research Team,Ministry of Education,China(No.IRT-16R61)Special Fund Project for the Central Government to Guide Local Science and Technology Development(2020)the Applied Fundamental Research Fund of Sichuan Province(No.2019YJ0169)the new scholar fund of UESTC.
文摘The metal—organic frameworks(MOFs)are expected as ideal biomimetic enzymes for colorimetric glucose detection because of their large surface areas,well defined pore structures,tunable chemical composition,and multi-functional sites.However,the intrinsically chemical instability and low mimetic enzyme activity of MOFs hinder the application of them in imitating the enzyme reactions.In this work,we demonstrated a metal-MOF synergistic catalysis strategy,by loading Pt nanoparticles(Pt NPs)on MIL-88B-NH2(Fe-MOF)to increase peroxidase-like activity for the detection of glucose.The induced electrons transfer from Pt atom to Fe atom accelerated the redox cycling of Fe^(3+)/Fe^(2+),improved the overall efficiency of the peroxidase-like reaction,and enabled the efficient and robust colorimetric glucose detection,which was proved by both experiments and density functional theory(DFT)calculation.Additionally,the sensitivity and chemical stability of this synergistic effect strategy to detect the glucose are not affected by the complex external factors,which represented a great potential in fast,easy,sensitive,and specific recognition of clinical diabetes.
基金supported by the National Natural Science Foundation of China(Nos.21165016,21175108,21265018)the Science and Technology Support Projects of Gansu Province(Nos.1011GKCA025,090GKCA036,1208RJZM289)
文摘In this work,the chitosan and N-doped graphene natively grown on hierarchical porous carbon(N-PC-G/CS) nanocomposite was obtained by ultrasonic method,as a novel sensor platform for determination of tartrazine(TT).The nanocomposite as prepared had well dispersivity in water and excellent conductivity.The N-PC-G/CS nanocomposite was characterized by scanning electron microscopy(SEM),transmission electron microscopy(TEM),nitrogen adsorption-desorption,fourier transform infrared(FTIR) and electrochemical impedance spectroscopy(EIS).The application of N-PC-G/CS for determination of tartrazine(TT) was investigated by chronocoulometry(CC),cyclic voltammetry(CV) and differential pulse voltammetry(DPV).Under optimized conditions,the sensor displayed a sensitive response to TT within a wide concentration range of 0.05-15.0 μmol/L,the detection limits is 0.036 μmol/L(S/N = 3).Furthermore,this nanocomposite could be efficiently applied for determination of TT in soft drink samples.
基金supported by the National Natural Science Foundation of China (Nos.21467028 and 21777129)the Program for Innovative Research Group of Gansu Province+3 种基金China(No.1210RJIA001)Special Fund Project for the Central Government to Guide Local Science and Technology Development (2020)Key Laboratory of Polymer Materials of Gansu Provincethe Key Laboratory of Ecological Environment Related Polymer Materials of Ministry of Education。
文摘A novel flower-shaped zeolitic imidazolate framework(ZIF) doped organic-inorganic hybrid monolithic column(ZIF-HMC) was prepared by a simple sol-gel "one-step" method and utilized for efficient capillary microextraction(CME) of four brominated flame retardants.The prepared monolithic was characterized by Fourier transform infrared,scanning electron microscopy,X-ray photoelectron spectroscopy,energy disperse spectroscopy,and N_(2) adsorption-desorption.The parameters of CME were optimized by orthogonal array design.Under the optimal conditions,the ZIF-HMC showed excellent extraction efficiency,the limit of detection(LODs) and the limit of quantification(LOQs) were in the range of0.52$3.1 mg/L and 1.7$10 mg/L,respectively,and the proposed method demonstrated good recovery(88.8%–116.6%) with the RSD less than 13.6% and a reusability of at least 30 times.The ZIF-HMC possessed great potential for separating organic pollutants and the strategy used here could be extended to prepare other derivatized HMC functionalized monoliths.
基金This work was supported by the Project of the Ministry of Science and Technology of China(No.2017YFA0205000)the National Natural Science Foundation of China(Nos.51802053,21790353,21721002)the Strategic Priority Research Program of Chinese Academy of Sciences(No.XDB36000000).
文摘How water layer adsorbed on solid surface under ambient conditions affects the interfacial friction is a fundamental question for understanding the friction and lubrication phenomena in practical system.We investigate the formation of ice-like(IL)water layers on the hydrophobic surface of graphite with partially covered MoO_(3)nanoflakes(NFs)using atomic force microscopy(AFM)based techniques.The IL water layers are found surrounding the MoO_(3)NFs and also intercalated at the MoO_(3)/graphite interface,as proved by thickness measurements as well as local adhesion force and surface potential mappings.AFM manipulations carried out on MoO_(3)NFs on graphite show that the presence of the IL water layers increases the frictional resistance of the interface.Comparing the results on continuous and discontinuous IL water layers,we can identify the different sliding interfaces in the two scenarios.The increased friction for MoO_(3)NFs sliding on graphite with an intercalated water layer is attributed to the energy dissipation originated from the metastable nature of the IL layers.
基金financially supported by the National Natural Science Foundation of China(Nos. 21165016, 21175108, 21265018)the Science and Technology Support Projects of Gansu Province (Nos. 1011GKCA025, 090GKCA036,1208RJZM289)
文摘A novel three-dimensional (3D) layered MoS2@graphene functionalized with nitrogen-doped graphene quantum dots (MoS2@N-GQDs-GR) composites as an enhanced electrochemical hydrogen evolution catalyst. The few layered MoS2 nanoflowers supported on N-GQDs-GR surface were elaborately fabricated by one-pot hydrothermal method, which MoS2 and N-GQDs-GR exist in a bonding manner of Mo-N. In addition, due to the layered MoS2 sheet edge exposes more hydrogen evolution active sites and N-GQDs-GR have high conductivity, the composites exhibit prominent electrocatalytic activity with a low overpotential 99 mV, a small Tafel slope 49.3 mV/dec. Therefore, that the current work will develop HER catalysts may replace Pt.
基金This work was supported by the National Natural Science Foundation of China(Nos.51571072 and 51871078)Heilongjiang Science Foundation(No.E2018028)the China Scholarship Council,and the NSF MRSEC Program(DMR-14-19807).
文摘The morphology and size of Pt-based bimetallic alloys are known to determine their electrocatalytic performance in reactions relevant to fuel cells.Here,we report a general approach for preparing Pt-M(M=Fe,Co and Ni)bimetallic nano-branched structure(NBs)by a simple high temperature solution-phase synthesis.As-prepared Pt-M NBs show a polycrystalline structure and are rich in steps and kinks on the surface,which promote them favorable bifunctional catalytic properties in acidic electrolytes,specifically in terms of the oxygen reduction reaction(ORR)and methanol oxidation reaction(MOR).Specially,Pt-Co NBs/C catalyst shows 6.1 and 5.3 times higher in specific activity(SA)and mass activity(MA)for ORR than state-of-the-art commercial Pt/C catalysts,respectively.Moreover,it exhibits a loss of 4.0%in SA and 14.4%in MA after 10,000 cycles of accelerated durability tests(ADTs)compared with the initial activities.In addition,we also confirmed the superior MOR activity of Pt-Co NBs/C catalyst in acidic electrolytes.For Pt-M NBs with other alloying metals,the ORR and MOR activities are both higher than commercial catalysts and are in the sequence of Pt-Co/C>Pt-Fe/C>Pt-Ni/C>commercial Pt/C(or PtRu/C).The improved activities and durability can benefit from the morphological and compositional effects.This synthesis approach may be applied to develop bifunctional catalysts with enhanced ORR and MOR properties for future fuel cells designs.
基金supported by the Youth Innovation Promotion Association CAS(2018455)the regional key projects of science and technology service network program of Chinese Academy of Sciences(KFJ-STS-QYZD-139)+1 种基金the National Natural Science Foundation of China(No.51402315)the Key Research&Development Program in Gansu(18YF1GA125)and Scientific Research Project of Colleges and Universities in Gansu Province(No.2018D-03).The characterization results were supported by Beijing Zhongkebaice Technology Service Co.,Ltd.
文摘High entropy alloys(HEAs),which is at the expense of high cost compared to traditional alloy,should not be confined to the mechanical properties,but should be employed to devise a novel combination with unique functional and mechanical performances.In this work,high entropy alloy nitride(HEAN)is utilized as a novel double absorption layer to improve solar absorption in the high temperature solar selective absorbing coatings(SSACs).Our primary motivation is to lower thermal emittance(ε)and enhance solar absorptance(a).In order to realize this goal,coating design(CODE)software is employed to design and optimize the proposed HEAN based SSACs using appropriate dielectric function model.The ultimate as-deposited coating shows good optical properties with a high a value of 0.965 and a lowεvalue of 0.086(at 82C).The estimate of thermal stability tests indicates that HEAN based SSACs has the ability to resist instability in high working temperature,which keeps good optical properties(a¼0.925,ε¼0.070)after annealing at 600C for 10 h.
基金supported by the National Natural Science Foundation of China(21705117,22174110,21904095 and 22004089)the Elite Scholar Program of Tianjin University(2019XRG-0065)+2 种基金the Program of Tianjin Science and Technology Major Project and Engineering(19ZXYXSY00090)the Program for Chang Jiang Scholars and Innovative Research Team,Ministry of Education,China(IRT-16R61)the Special Fund Project for the Central Government to Guide Local Science and Technology Development(2020)。
基金National Key Research and Development Program of China(Nos.2021YFA1500403 and 2021YFA1200302)Strategic Priority Research Program of Chinese Academy of Sciences(No.XDB36000000)+2 种基金National Natural Science Foundation of China(Nos.92056204,21890381,21721002,22173024,21722102 and 51672053)Beijing Natural Science Foundation,China(No.2182087)Youth Innovation Promotion Association of CAS.
文摘Regulating Lewis acid sites with well-defined electronic state and steric environment is still challenging for achieving high catalytic efficiency.Here we show coordinating zirconium nodes in the typical metal-organic framework known as MOF-545 with the monocarboxylate modulators including trifluoroacetic acid(TFA)or benzoic acid(BA)over meso-tetra(4-carboxyphenyl)-porphine(H_(2)TCPP),denoted as MOF-545-TFA or MOF-545-BA.Impressively,MOF-545-TFA shows the significantly enhanced performance for the catalytic ring-opening reaction of various epoxides with alcohols and good recyclability at 40°C in respect with MOF-545-BA and ZrO_(2).This mainly originates from the stronger Lewis acidity and more active zirconium sites induced by the electron-withdrawing TFA,resulting in the increased ability for activation of epoxides.This modulation approach is promising for enlarging the toolbox to extend the MOFs-based Lewis acid catalysis.
基金This workwas financially supported by the regional key projects of science and technology service network program of Chinese Academy of Sciences(KFJ-STS-QYZD-139)the Youth Innovation Promotion Association CAS(2018455)the Major Science and Technology Projects of Gansu Province(20ZD7GF011).
文摘With the development of new materials and technology,high entropy alloy(HEA)nitride films have attracted much attention of researchers due to their excellent optical properties and mechanical properties.Herein,a novel SS/NbMoTaWN(HEAN)/NbMoTaWON(HEAON)/SiO_(2) coatings are prepared,which shows a high spectral selectivity of a/ε=0.944/0.12.The preparation and optimization of the coating are studied by combining experiments with ellipsometric program and CODE software.High temperature thermal stability test is performed in depth,which proves that the coating could bear 400℃ in air for 2 h,and 600℃for 2 h in vacuum.Long-term thermal stability researches indicate that the SSACs still keep good optical properties(a=0.902,ε=0.106)even after annealing at 600℃ for 100 h.The failure mechanism is analyzed by XRD and Raman spectra.In addition,neutral salt spray test is performed to investigate the anti-corrosion ability,which indicates the coating has a good optical performance after soaking in 3.5 wt%NaCl solution for 30 days.Obviously,this work provides a new strategy to construct solar absorber coatings based on NbMoTaW high entropy alloy.
