首页|Enhanced photocatalytic nitrogen fixation performance via in situ constructing BiO2-x/NaNbO3 heterojunction
Enhanced photocatalytic nitrogen fixation performance via in situ constructing BiO2-x/NaNbO3 heterojunction
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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.
Jiayu Zhang、Zhihao Zeng、Lin Yue、Chunran Zhao、Xin Hu、Leihong Zhao、Xiuwen Wang、Yiming He
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Key Laboratory of the Ministry of Education for Advanced Catalysis Materials,College of Chemistry and Materials Science,Zhejiang Normal University,Jinhua 321004,China
Department of Materials Science and Engineering,Zhejiang Normal University,Jinhua 321004,China
Heilongjiang Provincial Key Laboratory of Surface Active Agent and Auxiliary,School of Chemistry and Chemistry Engineering,Qiqihar University,Qiqihar 161006,China
National Natural Science Foundation of ChinaKey Research and Development Program of Zhejiang Province
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