Abstract
The fabrication of heterojunction catalysts is an effective strategy to enhance charge separation effi-ciency,thereby boosting the performance of photocatalysts.In this study,BiO2-x nanosheets were synthesized through a hydrothermal process and loaded onto NaNbO3 microcube to construct a series of BiO2-x/NaNbO3 heterojunctions for photocatalytic N2 fixation.Results indicated that 2.5％BiO2-x/NaNbO3 had the highest photocatalytic performance.The NH3 production rate under simulated solar light reached 406.4 μmol·L-1·g-1·h-1,which reaches 2.6 and 3.8 times that of NaNbO3 and BiO2-x,respec-tively.BiO2-x nanosheets primarily act as electron trappers to enhance the separation efficiency of charge carriers.The strong interaction between BiO2-x and NaNbO3 facilitates the electron migration between them.Meanwhile,the abundant oxygen vacancies in BiO2-x nanosheets may facilitate the adsorption and activation of N2,which may be another possible reason of the high photocatalytic activity of the BiO2-x/NaNbO3.This study may offer new insights for the development of semiconductor materials in photo-catalytic nitrogen fixation.
基金项目
National Natural Science Foundation of China(22172144)
Key Research and Development Program of Zhejiang Province(2023C03148)
NETL
NSTL
万方数据