期刊
CHEMICAL ENGINEERING JOURNAL
卷 424, 期 -, 页码 -出版社
ELSEVIER SCIENCE SA
DOI: 10.1016/j.cej.2021.130537
关键词
Red mud; Silver phosphate; Host material; S-scheme mechanism; Photo-Fenton
资金
- National Natural Science Foundation of China [21667004]
- Guangxi Science Foundation Funded Project [2021GXNSFAA075006, 2018GXNSFAA281343]
- Open Project of Guangxi Key Laboratory of Bio-refinery [GXKLB20-01]
- Innovation Project of Guangxi Graduate Education [YCBZ2021028]
This study successfully prepared a new Ag3PO4/RM composite using red mud as a host material for the growth of silver phosphate, exhibiting remarkable photocatalytic activity, stability, and reusability for the degradation of TC-HCl in photo-Fenton reaction. The S-scheme charge transfer in APRM-110 accelerated the separation of photo-generated carriers, effectively restraining photocorrosion.
In our work, using industrial waste red mud (RM) as a host material to grow silver phosphate (Ag3PO4), a low-cost and new heterogeneous Ag3PO4/RM (APRM) composite was successfully prepared through a facile in-situ deposition method. The characterization results demonstrated Ag3PO4 nanoparticles uniformly deposited on RM to form P-O-Fe bonds, and a semiconductor heterostructure was constructed between the two nanocrystalline components of Ag3PO4 and Fe2O3. The optimal composite of APRM-110 exhibited a remarkable photocatalytic activity for the degradation of tetracycline hydrochloride (TC-HCl) in photo-Fenton reaction. The enhanced photocatalytic performance and stability could be attributed to the S-scheme charge transfer in APRM-110, which accelerated the photo-generated carrier separation and then effectively restrained the photocorrosion of APRM-110. The APRM-110 composite held good reusability, stability and excellent settleability. The main intermediates were identified and the degradation pathway of TC-HCl in photo-Fenton reaction catalyzed by APRM-110 was proposed. The aquatic toxicity of TC-HCl solution could be effectively weakened by the photo-Fenton catalyzed by APRM-110. This work has designed a cost-efficiency and stable RM-based Ag3PO4 composite, and as a highly effective catalyst for TC-HCl degradation in photo-Fenton reaction.
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