The fabrication of heterojunction catalysts is an effective strategy to enhance charge separation efficiency,thereby boosting the performance of photocatalysts.In this study,BiO_(2-x)nanosheets were synthesized throug...The fabrication of heterojunction catalysts is an effective strategy to enhance charge separation efficiency,thereby boosting the performance of photocatalysts.In this study,BiO_(2-x)nanosheets were synthesized through a hydrothermal process and loaded onto NaNbO_(3) microcube to construct a series of BiO_(2-x)/NaNbO_(3) heterojunctions for photocatalytic N_(2) fixation.Results indicated that 2.5%BiO_(2-x)/NaNbO_(3) had the highest photocatalytic performance.The NH_(3) production rate under simulated solar light reached 406.4μmol·L^(-1)·g^(-1)·h^(-1),which reaches 2.6 and 3.8 times that of NaNbO_(3) and BiO_(2-x),respectively.BiO_(2-x)nanosheets primarily act as electron trappers to enhance the separation efficiency of charge carriers.The strong interaction between BiO_(2-x)and NaNbO_(3) facilitates the electron migration between them.Meanwhile,the abundant oxygen vacancies in BiO_(2-x)nanosheets may facilitate the adsorption and activation of N_(2),which may be another possible reason of the high photocatalytic activity of the BiO_(2-x)/NaNbO_(3).This study may offer new insights for the development of semiconductor materials in photocatalytic nitrogen fixation.展开更多
基金financially supported by the National Natural Science Foundation of China(22172144)Key Research and Development Program of Zhejiang Province(2023C03148)。
文摘The fabrication of heterojunction catalysts is an effective strategy to enhance charge separation efficiency,thereby boosting the performance of photocatalysts.In this study,BiO_(2-x)nanosheets were synthesized through a hydrothermal process and loaded onto NaNbO_(3) microcube to construct a series of BiO_(2-x)/NaNbO_(3) heterojunctions for photocatalytic N_(2) fixation.Results indicated that 2.5%BiO_(2-x)/NaNbO_(3) had the highest photocatalytic performance.The NH_(3) production rate under simulated solar light reached 406.4μmol·L^(-1)·g^(-1)·h^(-1),which reaches 2.6 and 3.8 times that of NaNbO_(3) and BiO_(2-x),respectively.BiO_(2-x)nanosheets primarily act as electron trappers to enhance the separation efficiency of charge carriers.The strong interaction between BiO_(2-x)and NaNbO_(3) facilitates the electron migration between them.Meanwhile,the abundant oxygen vacancies in BiO_(2-x)nanosheets may facilitate the adsorption and activation of N_(2),which may be another possible reason of the high photocatalytic activity of the BiO_(2-x)/NaNbO_(3).This study may offer new insights for the development of semiconductor materials in photocatalytic nitrogen fixation.
