The development of a bifunctional photocatalyst that can be utilized for both energy conversion and envi-ronmental remediation is of great practical significance.In addition,an S-scheme charge transfer process can ass...The development of a bifunctional photocatalyst that can be utilized for both energy conversion and envi-ronmental remediation is of great practical significance.In addition,an S-scheme charge transfer process can assist a photocatalyst in efficiently separating photoexcited electrons and holes while maintaining the strong reducibility and oxidizability of the former and the latter,respectively.We developed a bifunctional S-scheme hybrid photocatalyst comprising CdS nanorods and BiOIO_(3)(BIO) nanosheets for efficient antibi-otic degradation and cocatalyst-and sacrificial reagent-free CO_(2) reduction.The combination of visible-light-responsive one-dimensional(1D)CdS and UV-light-responsive 2D BIO resulted in a CdS/BIO hybrid photocatalyst with effective 1D/2D(line)interfacial contact and a broadened optical absorption range.Notably,the CdS/BIO hybrid exhibited exceptional diclofenac degradation and mineralization as well as outstanding CO_(2) reduction activity for CO production,with 95.4%CO selectivity over H_(2)production.The exceptional performance of the hybrid catalyst is primarily attributed to the accelerated photoexcited charge transfer caused by the 1D/2D line interfacial contact and the high charge separation and strong redox power of the separated charges,both of which stem from the effective S-scheme charge transfer process.In addition,photocorrosion of CdS was substantially mitigated,resulting in the high photocat-alytic performance of the hybrid catalyst even after repeated test runs.This study provides insight into the rational design of bifunctional S-scheme hybrid photocatalysts for CO_(2) reduction and pollutant degra-dation.展开更多
A two-dimensional(2D)/2D hybrid heterojunction with face-to-face interfacial assembly is a desirable dimensionality design with significant potential for various photocatalytic applications due to the large interfacia...A two-dimensional(2D)/2D hybrid heterojunction with face-to-face interfacial assembly is a desirable dimensionality design with significant potential for various photocatalytic applications due to the large interfacial contact area,which facilitates charge migration and separation.Herein,we developed an ef-ficient 2D/2D hybrid heterojunction consisting of BiOIO 3 nanoplates(BIO)and g-C_(3)N_(4) nanosheets(CN)using a simple but effective in situ growth method for photocatalytic aqueous antibiotic degradation and H_(2) generation.The face-to-face interfacial assembly of the BIO and CN components in the BIO/CN hy-brid heterojunction was verified using electron microscopy.Remarkably,the BIO/CN hybrid heterojunc-tion outperformed both the BIO and CN counterparts in terms of norfloxacin degradation and H_(2) gen-eration under simulated solar light irradiation.Moreover,the photocatalytic performance of the hybrid catalyst remained nearly unchanged throughout five consecutive test runs.The exceptional performance and stability of the hybrid catalyst are attributable to its extended optical absorption range,large interfa-cial contact area provided by the face-to-face assembly in the 2D/2D hybrid configuration,and enhanced photoexcited charge separation efficiency and redox power of the separated charges,which are supported by an efficient S-scheme charge transfer mechanism.This study illuminates the rational construction of novel 2D/2D S-scheme hybrid heterojunction photocatalysts with practical applications in environmental remediation and sustainable energy generation.展开更多
基金This work was supported by a National Research Foundation of Korea(NRF)grant funded by the Korean government(MSIT)(No.NRF-2018R1A5A1025137).
文摘The development of a bifunctional photocatalyst that can be utilized for both energy conversion and envi-ronmental remediation is of great practical significance.In addition,an S-scheme charge transfer process can assist a photocatalyst in efficiently separating photoexcited electrons and holes while maintaining the strong reducibility and oxidizability of the former and the latter,respectively.We developed a bifunctional S-scheme hybrid photocatalyst comprising CdS nanorods and BiOIO_(3)(BIO) nanosheets for efficient antibi-otic degradation and cocatalyst-and sacrificial reagent-free CO_(2) reduction.The combination of visible-light-responsive one-dimensional(1D)CdS and UV-light-responsive 2D BIO resulted in a CdS/BIO hybrid photocatalyst with effective 1D/2D(line)interfacial contact and a broadened optical absorption range.Notably,the CdS/BIO hybrid exhibited exceptional diclofenac degradation and mineralization as well as outstanding CO_(2) reduction activity for CO production,with 95.4%CO selectivity over H_(2)production.The exceptional performance of the hybrid catalyst is primarily attributed to the accelerated photoexcited charge transfer caused by the 1D/2D line interfacial contact and the high charge separation and strong redox power of the separated charges,both of which stem from the effective S-scheme charge transfer process.In addition,photocorrosion of CdS was substantially mitigated,resulting in the high photocat-alytic performance of the hybrid catalyst even after repeated test runs.This study provides insight into the rational design of bifunctional S-scheme hybrid photocatalysts for CO_(2) reduction and pollutant degra-dation.
基金supported by the National Research Foundation of Korea(NRF)grant funded by the Korea government(MSIT)(No.NRF-2018R1A5A1025137).
文摘A two-dimensional(2D)/2D hybrid heterojunction with face-to-face interfacial assembly is a desirable dimensionality design with significant potential for various photocatalytic applications due to the large interfacial contact area,which facilitates charge migration and separation.Herein,we developed an ef-ficient 2D/2D hybrid heterojunction consisting of BiOIO 3 nanoplates(BIO)and g-C_(3)N_(4) nanosheets(CN)using a simple but effective in situ growth method for photocatalytic aqueous antibiotic degradation and H_(2) generation.The face-to-face interfacial assembly of the BIO and CN components in the BIO/CN hy-brid heterojunction was verified using electron microscopy.Remarkably,the BIO/CN hybrid heterojunc-tion outperformed both the BIO and CN counterparts in terms of norfloxacin degradation and H_(2) gen-eration under simulated solar light irradiation.Moreover,the photocatalytic performance of the hybrid catalyst remained nearly unchanged throughout five consecutive test runs.The exceptional performance and stability of the hybrid catalyst are attributable to its extended optical absorption range,large interfa-cial contact area provided by the face-to-face assembly in the 2D/2D hybrid configuration,and enhanced photoexcited charge separation efficiency and redox power of the separated charges,which are supported by an efficient S-scheme charge transfer mechanism.This study illuminates the rational construction of novel 2D/2D S-scheme hybrid heterojunction photocatalysts with practical applications in environmental remediation and sustainable energy generation.
