Enhanced photocatalytic nitrogen fixation performance via in situ constructing BiO2-x/NaNbO3 heterojunction

doi:10.1016/j.cjche.2024.02.003

中国化学工程学报 ›› 2024, Vol. 69 ›› Issue (5): 92-100.DOI: 10.1016/j.cjche.2024.02.003

Enhanced photocatalytic nitrogen fixation performance via in situ constructing BiO_2-x/NaNbO₃ heterojunction

Jiayu Zhang¹, Zhihao Zeng¹, Lin Yue¹, Chunran Zhao³, Xin Hu¹, Leihong Zhao¹, Xiuwen Wang², Yiming He^1,3

1. Key Laboratory of the Ministry of Education for Advanced Catalysis Materials, College of Chemistry and Materials Science, Zhejiang Normal University, Jinhua 321004, China;
2. Heilongjiang Provincial Key Laboratory of Surface Active Agent and Auxiliary, School of Chemistry and Chemistry Engineering, Qiqihar University, Qiqihar 161006, China;
3. Department of Materials Science and Engineering, Zhejiang Normal University, Jinhua 321004, China

收稿日期:2023-08-04 修回日期:2024-02-01 出版日期:2024-05-28 发布日期:2024-07-01
通讯作者: Leihong Zhao,E-mail:zhaoleihiong@163.com;Xiuwen Wang,E-mail:xwwang@qqhru.edu.cn;Yiming He,E-mail:hym@zjnu.cn
基金资助:
The work was financially supported by the National Natural Science Foundation of China (22172144) and Key Research and Development Program of Zhejiang Province (2023C03148).

Enhanced photocatalytic nitrogen fixation performance via in situ constructing BiO_2-x/NaNbO₃ heterojunction

Jiayu Zhang¹, Zhihao Zeng¹, Lin Yue¹, Chunran Zhao³, Xin Hu¹, Leihong Zhao¹, Xiuwen Wang², Yiming He^1,3

1. Key Laboratory of the Ministry of Education for Advanced Catalysis Materials, College of Chemistry and Materials Science, Zhejiang Normal University, Jinhua 321004, China;
2. Heilongjiang Provincial Key Laboratory of Surface Active Agent and Auxiliary, School of Chemistry and Chemistry Engineering, Qiqihar University, Qiqihar 161006, China;
3. Department of Materials Science and Engineering, Zhejiang Normal University, Jinhua 321004, China

Received:2023-08-04 Revised:2024-02-01 Online:2024-05-28 Published:2024-07-01
Contact: Leihong Zhao,E-mail:zhaoleihiong@163.com;Xiuwen Wang,E-mail:xwwang@qqhru.edu.cn;Yiming He,E-mail:hym@zjnu.cn
Supported by:
The work was financially supported by the National Natural Science Foundation of China (22172144) and Key Research and Development Program of Zhejiang Province (2023C03148).

摘要/Abstract

摘要： 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 NaNbO₃ microcube to construct a series of BiO_2-x/NaNbO₃ heterojunctions for photocatalytic N₂ fixation. Results indicated that 2.5% BiO_2-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 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 NaNbO₃ facilitates the electron migration between them. Meanwhile, the abundant oxygen vacancies in BiO_2-x nanosheets may facilitate the adsorption and activation of N₂, which may be another possible reason of the high photocatalytic activity of the BiO_2-x/NaNbO₃. This study may offer new insights for the development of semiconductor materials in photocatalytic nitrogen fixation.

关键词: Catalyst, Solar energy, Hydrothermal, BiO_2-x/NaNbO₃, Photocatalytic N₂-fixation

Abstract: 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 NaNbO₃ microcube to construct a series of BiO_2-x/NaNbO₃ heterojunctions for photocatalytic N₂ fixation. Results indicated that 2.5% BiO_2-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 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 NaNbO₃ facilitates the electron migration between them. Meanwhile, the abundant oxygen vacancies in BiO_2-x nanosheets may facilitate the adsorption and activation of N₂, which may be another possible reason of the high photocatalytic activity of the BiO_2-x/NaNbO₃. This study may offer new insights for the development of semiconductor materials in photocatalytic nitrogen fixation.

Key words: Catalyst, Solar energy, Hydrothermal, BiO_2-x/NaNbO₃, Photocatalytic N₂-fixation

Jiayu Zhang, Zhihao Zeng, Lin Yue, Chunran Zhao, Xin Hu, Leihong Zhao, Xiuwen Wang, Yiming He. Enhanced photocatalytic nitrogen fixation performance via in situ constructing BiO_2-x/NaNbO₃ heterojunction[J]. 中国化学工程学报, 2024, 69(5): 92-100.

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Enhanced photocatalytic nitrogen fixation performance via in situ constructing BiO_2-x/NaNbO₃ heterojunction

Enhanced photocatalytic nitrogen fixation performance via in situ constructing BiO_2-x/NaNbO₃ heterojunction

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