In recent years,organic photocatalyst under visible-light absorption has shown significant potential for solving environmental problems.However,it is still a great challenge for constructing a highly active organic ph...In recent years,organic photocatalyst under visible-light absorption has shown significant potential for solving environmental problems.However,it is still a great challenge for constructing a highly active organic photocatalyst due to the low separation efficiency of photogenerated carriers.Herein,an effective and robust photocatalyst perylene-3,4,9,10-tetracarboxylic diamide/boron nitride quantum dots(PDI/BNQDs),consisting of selfassemble PDI withπ–πstacking structure and BNQDs,has been constructed and researched under visible light irradiation.The PDI/BNQDs composite gradually increases organic pollutant photodegradation with the loading amount of BNQDs.With 10 mL of BNQDs solution added(PDI/BNQDs-10),the organic pollutant photodegradation performance reaches a maximum,about 6.16 times higher with methylene blue and 1.68 times higher with ciprofloxacin than that of pure PDI supramolecular.The enhancement is attributed to improved separation of photogenerated carriers from self-assembled PDI by BNQDs due to their preeminent ability to extract holes.This work is significant for the supplement of PDI supramolecular composite materials.We believe that this photocatalytic design is capable of expanding organic semiconductors’potential for their applications in photocatalysis.展开更多
In this study, Bi_(2)MoO_(6) with adjustable rich oxygen vacancies was prepared by a novel and simple solvothermal-photoreduction method which might be suitable for a large-scale production. The experiment results sho...In this study, Bi_(2)MoO_(6) with adjustable rich oxygen vacancies was prepared by a novel and simple solvothermal-photoreduction method which might be suitable for a large-scale production. The experiment results show that Bi_(2)MoO_(6) with rich oxygen vacancies is an excellent photocatalyst. The photocatalytic ability of BMO-10 is 0.3 and 3.5 times higher than that of the pristine Bi_(2)MoO_(6) for Rhodamine B degradation and Cr(VI) reduction, respectively. The results display that the band energy of the samples with oxygen vacancies was narrowed and the light absorption was broadened. Meanwhile, the efficiency of photogenerated electron-holes was increased and the separation and transfer speed of photogenerated carriers were improved. Therefore, this work provides a convenient and efficient method to prepare potential adjustable oxygen vacancy based photocatalysts to eliminate the pollution of dyes and Cr(VI) in water.展开更多
基金the National Natural Science Foundation of China(Grant No.21978276)the Fundamental Research Funds for the Central Universities(Grant Nos.2652019157,2652019158,and 2652019159).
文摘In recent years,organic photocatalyst under visible-light absorption has shown significant potential for solving environmental problems.However,it is still a great challenge for constructing a highly active organic photocatalyst due to the low separation efficiency of photogenerated carriers.Herein,an effective and robust photocatalyst perylene-3,4,9,10-tetracarboxylic diamide/boron nitride quantum dots(PDI/BNQDs),consisting of selfassemble PDI withπ–πstacking structure and BNQDs,has been constructed and researched under visible light irradiation.The PDI/BNQDs composite gradually increases organic pollutant photodegradation with the loading amount of BNQDs.With 10 mL of BNQDs solution added(PDI/BNQDs-10),the organic pollutant photodegradation performance reaches a maximum,about 6.16 times higher with methylene blue and 1.68 times higher with ciprofloxacin than that of pure PDI supramolecular.The enhancement is attributed to improved separation of photogenerated carriers from self-assembled PDI by BNQDs due to their preeminent ability to extract holes.This work is significant for the supplement of PDI supramolecular composite materials.We believe that this photocatalytic design is capable of expanding organic semiconductors’potential for their applications in photocatalysis.
基金partly supported by the National Natural Science Foundation of China(Grant No.21978276)Natural Science Foundation of Liaoning Province(No.2021-MS-260)Scientific Research Funding Project of the Educational Department of Liaoning Province in 2020(No.LZ2020002)。
文摘In this study, Bi_(2)MoO_(6) with adjustable rich oxygen vacancies was prepared by a novel and simple solvothermal-photoreduction method which might be suitable for a large-scale production. The experiment results show that Bi_(2)MoO_(6) with rich oxygen vacancies is an excellent photocatalyst. The photocatalytic ability of BMO-10 is 0.3 and 3.5 times higher than that of the pristine Bi_(2)MoO_(6) for Rhodamine B degradation and Cr(VI) reduction, respectively. The results display that the band energy of the samples with oxygen vacancies was narrowed and the light absorption was broadened. Meanwhile, the efficiency of photogenerated electron-holes was increased and the separation and transfer speed of photogenerated carriers were improved. Therefore, this work provides a convenient and efficient method to prepare potential adjustable oxygen vacancy based photocatalysts to eliminate the pollution of dyes and Cr(VI) in water.
