Efficient degradation of tetracycline hydrochloride by direct Z-scheme HKUST-1@m-BiVO4 catalysts with self-produced H2O2 under both dark and light. Issue 3 (June 2022)

• Record Type: Journal Article
• Authors: Yuan, Lanjie; Wang, Zhihua; Gu, Fubo
• Is Part Of: Journal of environmental chemical engineering. Volume 10:Issue 3(2022)
• Publication Date: 2022-06
• Subjects: m-BiVO4 -- HKUST-1 -- Photocatalysis -- Self-produced H2O2 -- Tetracycline hydrochloride; Chemical engineering -- Environmental aspects -- Periodicals; Environmental engineering -- Periodicals; Chemical engineering -- Environmental aspects; Environmental engineering; Periodicals; 660.0286
• DOI: 10.1016/j.jece.2022.107964
• Languages: English
• ISSNs: 2213-2929

Abstract

Abstract: Tetracycline hydrochloride (TCH) is a widely used antibacterial agent, which could cause a long-term danger to ecosystem function and human health. It is significant to remove TCH from water. In this work, a series of HKUST-1@m-BiVO4 catalysts were prepared via the facile ball-milling method and the optimum catalyst exhibited high degradation efficiency (65.14% in dark, 91.72% in visible light) toward TCH. The recycle experiment proved that the prepared catalyst had good stability. The degradation mechanism was investigated. The HKUST-1@m-BiVO4 catalysts can activate O2 to generate H2 O2, ·OH, and ·O 2 - under both dark and light conditions, which can efficiently participate in TCH decomposition. The good synergistic effect between Cu 2+ /Cu + Fenton-like reaction and Z-scheme heterojunction can further promote the generation of active species in visible light, which led that HKUST-1@m-BiVO4 catalysts showed better degradation of TCH in visible light. The TCH degradation pathways were analyzed and the results indicated that the intermediates had lower toxicity than TCH. This work provided a facile method for the preparation of the catalysts with self-produced and activation of H2 O2, which could degrade organic pollutants in both dark and visible light in practical wastewater treatment. Graphical Abstract: ga1 Highlights: HKUST-1 @m-BiVO4 (HB- xy ) composites were prepared via a facile ball-milling method. TCH can be effectively degraded by optimal HB- xy in both dark and visible light. HB- xy can activate O2 to generate H2 O2, ·OH, and ·O 2 - in both dark and visible light. Synergetic mechanism from Cu 2+ /Cu + Fenton-like and Z-Scheme was proposed and proved. The ecotoxicities and degradation pathway of intermediates and TCH were evaluated.