Novel PbMoO4 Loaded N-biochar Composites with Enhanced Adsorption-photocatalytic Removal of Tetracycline
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Academic Unit
College of Arts and Sciences
Publication Date
3-2023
Document Type
Article
Abstract
Modifying energy band structure and increasing absorption are two efficient strategies to improve the photocatalytic performance of semiconductor photocatalysts. In this study, a novel biochar (BC) based photocatalyst, nitrogen-doped (N-doped) BC based PbMoO4 (NPBC) was developed by combining both strategies. After loading PbMoO4 on poplar sawdust via in situ method, the composites were pyrolyzed in the presence of a certain amount of urea. Nitrogen doping successfully increased the specific surface area and narrowed the bandgap of the composite of PbMoO4@BC (PBC) to improve its adsorption-photocatalytic performance. NPBC-2, in which the ratio of PbMoO4: poplar sawdust was 3:1.6, exhibited excellent adsorption-photocatalytic removal for 40 mg L−1 tetracycline (TC) under visible light and the total removal rate was 88.25%, which was 1.60 and 3.46 folds of that for PBC and PbMoO4, respectively. The adsorption kinetic of TC removal by NPBC-2 fitted well with pseudo fist order models, and the adsorption was dominated by the physical process. Vacancies (h+) and superoxide radicals (•O2−) were the main active species for TC photodegradation. In addition, after 5 cycles, the composite still exhibited high ability for TC removal. Therefore, N-doped BC based photocatalysts provided a feasible and effective way for the remediation of organism-contaminated water.
Journal Title
Optical Materials
Volume
137
DOI
https://doi.org/10.1016/j.optmat.2023.113540
Recommended Citation
Jiang, Mengzhu; Chen, Zhifen; Wu, Yaohui; Luo, Jinhua; Zhang, Aihua; Chen, Xiaoyong; Zeng, Yelin; Wang, Guangjun; Wang, Yonghong; and Zhao, Yunlin, "Novel PbMoO4 Loaded N-biochar Composites with Enhanced Adsorption-photocatalytic Removal of Tetracycline" (2023). Faculty Authors and Creators Reception. 123.
https://opus.govst.edu/fac/123