The unique photocatalytic mechanism of S-scheme heterojunction can be used to study new and efficient photocatalysts.By carefully selecting semiconductors for S-scheme heterojunction photocatalysts,it is possible to r...The unique photocatalytic mechanism of S-scheme heterojunction can be used to study new and efficient photocatalysts.By carefully selecting semiconductors for S-scheme heterojunction photocatalysts,it is possible to reduce the rate of photogenerated carrier recombination and increase the conversion efficiency of light into energy.Chalcogenides are a group of compounds that include sulfides and selenides(e.g.,CdS,ZnS,Bi_(2)S_(3),MoS_(2),ZnSe,CdSe,and CuSe).Chalcogenides have attracted considerable attention as heterojunction photocatalysts owing to their narrow bandgap,wide light absorption range,and excellent photoreduction properties.This paper presents a thorough analysis of S-scheme heterojunction photocatalysts based on chalcogenides.Following an introduction to the fundamental characteristics and benefits of S-scheme heterojunction photocatalysts,various chalcogenide-based S-scheme heterojunction photocatalyst synthesis techniques are summarized.These photocatalysts are used in numerous significant photocatalytic reactions,in-cluding the reduction of carbon dioxide,synthesis of hydrogen peroxide,conversion of organic matter,generation of hydrogen from water,nitrogen fixation,degradation of organic pollutants,and sterilization.In addition,cutting-edge characterization techniques,including in situ characterization techniques,are discussed to validate the steady and transient states of photocatalysts with an S-scheme heterojunction.Finally,the design and challenges of chalcogenide-based S-scheme heterojunction photocatalysts are explored and recommended in light of state-of-the-art research.展开更多
Inorganic-organic hybrid materials are promising for application in the field of photocatalysis because of their excellent properties.Therefore,their syntheses,mechanisms,and applications are reviewed in this paper.Fi...Inorganic-organic hybrid materials are promising for application in the field of photocatalysis because of their excellent properties.Therefore,their syntheses,mechanisms,and applications are reviewed in this paper.First,we introduce the role of inorganic-organic photocatalysts,their advantages and disadvantages,and their design principles.Second,we present the top-down and bottom-up synthesis methods of the hybrid materials.The interaction between inorganic and organic components in hybrid materials is discussed,followed by how to improve inorganic-organic photocatalysts.Third,the applications of hybrid materials in the field of photocatalysis,such as realizing hydrogen evolution,organic pollutant degradation,heavy metals and CO_(2) reduction,sterilization,and nitrogen fixation,are examined.Finally,the application prospects and development directions of inorganic-organic hybrid materials are explored and the unsolved problems are described.展开更多
Non-stoichiometric W_(18)O_(49)(WO)prepared by solvothermal method has excellent NIR absorption due to the localized surface plasmon resonance effect caused by oxygen vacancies.This has great potential in the field of...Non-stoichiometric W_(18)O_(49)(WO)prepared by solvothermal method has excellent NIR absorption due to the localized surface plasmon resonance effect caused by oxygen vacancies.This has great potential in the field of using sunlight to convert carbon dioxide into organic fuels.In addition,through the amination of CdSe,the one-dimensional/two-dimensional step-scheme(S-scheme)WO/CdSe-diethylenetriamine(WO/CdSe-D)photocatalyst with electron transmission channels driven by visible light to NIR light is constructed by microwave solvothermal method.The LSPR of WO and the synergistic effect of coupling semiconductors to construct S-scheme heterojunctions can improve light utilization and achieve efficient charge carrier transfer efficiency.The optimized photocatalyst of 35%WO/CdSe-D has the best CO_(2) reduction performance compared to WO and CdSe-D,and the yield is 25.37μmol h^(–1) g^(–1).X-ray photoelectron spectroscopy was used to verify the charge transfer path of the S-scheme WO/CdSe-D heterojunction.This work provides a possibility for the application of non-stoichiometric oxides rich in oxygen vacancies in the field of photocatalytic CO_(2) reduction.展开更多
Exploring new and efficient photocatalysts to boost photocatalytic CO_(2) reduction is of critical importance for solar-to-fuel conversion.In this study,through the in-situ growth method,a series of S-scheme mechanism...Exploring new and efficient photocatalysts to boost photocatalytic CO_(2) reduction is of critical importance for solar-to-fuel conversion.In this study,through the in-situ growth method,a series of S-scheme mechanism Bi_(2)S_(3)/BiVO_(4)/Mn_(0.5)Cd_(0.5)S-DETA nanocomposites with good photocatalytic activity were synthesized.The extremely small size of Mn_(0.5)Cd_(0.5)S-DETA nanoparticles provides more active sites for photocatalytic reactions.In order to solve the serious shortcomings of sulfide photo-corrosion,BiVO_(4) were introduced as oxidation catalyst to consume too many holes and improve the stability of the material.In addition,the in-situ growth method produces the reduction cocatalyst Bi_(2)S_(3) during the BiVO_(4) and Mn_(0.5)Cd_(0.5)S-DETA recombination process,thereby improving the efficiency of charge transfer at their interface contact.The ternary composite unveils a higher CO_(2)-reduction rate(44.74μmol g^(−1) h^(−1))comparing with pristine BiVO_(4)(14.11μmol g^(−1) h^(−1)).The enhanced photocatalytic CO_(2) reduction performance is due to the special interface structure of the S-scheme Bi_(2)S_(3)/BiVO_(4)/Mn_(0.5)Cd_(0.5)S-DETA photocatalyst,which facilitates the charge separation at the interface and improves its photocatalytic activity and stability.展开更多
文摘The unique photocatalytic mechanism of S-scheme heterojunction can be used to study new and efficient photocatalysts.By carefully selecting semiconductors for S-scheme heterojunction photocatalysts,it is possible to reduce the rate of photogenerated carrier recombination and increase the conversion efficiency of light into energy.Chalcogenides are a group of compounds that include sulfides and selenides(e.g.,CdS,ZnS,Bi_(2)S_(3),MoS_(2),ZnSe,CdSe,and CuSe).Chalcogenides have attracted considerable attention as heterojunction photocatalysts owing to their narrow bandgap,wide light absorption range,and excellent photoreduction properties.This paper presents a thorough analysis of S-scheme heterojunction photocatalysts based on chalcogenides.Following an introduction to the fundamental characteristics and benefits of S-scheme heterojunction photocatalysts,various chalcogenide-based S-scheme heterojunction photocatalyst synthesis techniques are summarized.These photocatalysts are used in numerous significant photocatalytic reactions,in-cluding the reduction of carbon dioxide,synthesis of hydrogen peroxide,conversion of organic matter,generation of hydrogen from water,nitrogen fixation,degradation of organic pollutants,and sterilization.In addition,cutting-edge characterization techniques,including in situ characterization techniques,are discussed to validate the steady and transient states of photocatalysts with an S-scheme heterojunction.Finally,the design and challenges of chalcogenide-based S-scheme heterojunction photocatalysts are explored and recommended in light of state-of-the-art research.
基金supported by the National Natural Science Foundation of China(22278169,51973078)the Excellent Scientific Research and Innovation Team of Education Department of Anhui Province(2022AH010028)+1 种基金the major projects of Education Department of Anhui Province(2022AH040068)Anhui Provincial Quality Engineering Project(2022sx134)。
文摘Inorganic-organic hybrid materials are promising for application in the field of photocatalysis because of their excellent properties.Therefore,their syntheses,mechanisms,and applications are reviewed in this paper.First,we introduce the role of inorganic-organic photocatalysts,their advantages and disadvantages,and their design principles.Second,we present the top-down and bottom-up synthesis methods of the hybrid materials.The interaction between inorganic and organic components in hybrid materials is discussed,followed by how to improve inorganic-organic photocatalysts.Third,the applications of hybrid materials in the field of photocatalysis,such as realizing hydrogen evolution,organic pollutant degradation,heavy metals and CO_(2) reduction,sterilization,and nitrogen fixation,are examined.Finally,the application prospects and development directions of inorganic-organic hybrid materials are explored and the unsolved problems are described.
文摘Non-stoichiometric W_(18)O_(49)(WO)prepared by solvothermal method has excellent NIR absorption due to the localized surface plasmon resonance effect caused by oxygen vacancies.This has great potential in the field of using sunlight to convert carbon dioxide into organic fuels.In addition,through the amination of CdSe,the one-dimensional/two-dimensional step-scheme(S-scheme)WO/CdSe-diethylenetriamine(WO/CdSe-D)photocatalyst with electron transmission channels driven by visible light to NIR light is constructed by microwave solvothermal method.The LSPR of WO and the synergistic effect of coupling semiconductors to construct S-scheme heterojunctions can improve light utilization and achieve efficient charge carrier transfer efficiency.The optimized photocatalyst of 35%WO/CdSe-D has the best CO_(2) reduction performance compared to WO and CdSe-D,and the yield is 25.37μmol h^(–1) g^(–1).X-ray photoelectron spectroscopy was used to verify the charge transfer path of the S-scheme WO/CdSe-D heterojunction.This work provides a possibility for the application of non-stoichiometric oxides rich in oxygen vacancies in the field of photocatalytic CO_(2) reduction.
基金This work was supported by the National Natural Science Foundation of China(Nos.51572103 and 51973078)the Distinguished Young Scholar of Anhui Province(No.1808085J14)+1 种基金the Major projects of Education Department of Anhui Province(No.KJ2020ZD005)the Key Foundation of Educational Commission of Anhui Province(No.KJ2019A0595).
文摘Exploring new and efficient photocatalysts to boost photocatalytic CO_(2) reduction is of critical importance for solar-to-fuel conversion.In this study,through the in-situ growth method,a series of S-scheme mechanism Bi_(2)S_(3)/BiVO_(4)/Mn_(0.5)Cd_(0.5)S-DETA nanocomposites with good photocatalytic activity were synthesized.The extremely small size of Mn_(0.5)Cd_(0.5)S-DETA nanoparticles provides more active sites for photocatalytic reactions.In order to solve the serious shortcomings of sulfide photo-corrosion,BiVO_(4) were introduced as oxidation catalyst to consume too many holes and improve the stability of the material.In addition,the in-situ growth method produces the reduction cocatalyst Bi_(2)S_(3) during the BiVO_(4) and Mn_(0.5)Cd_(0.5)S-DETA recombination process,thereby improving the efficiency of charge transfer at their interface contact.The ternary composite unveils a higher CO_(2)-reduction rate(44.74μmol g^(−1) h^(−1))comparing with pristine BiVO_(4)(14.11μmol g^(−1) h^(−1)).The enhanced photocatalytic CO_(2) reduction performance is due to the special interface structure of the S-scheme Bi_(2)S_(3)/BiVO_(4)/Mn_(0.5)Cd_(0.5)S-DETA photocatalyst,which facilitates the charge separation at the interface and improves its photocatalytic activity and stability.
