ISSN print edition: 0366-6352 ISSN electronic edition: 1336-9075 Registr. No.: MK SR 9/7 Published monthly

Preparation of MnO₂/BiVO₄ composite photocatalyst materials applied in landscape-water purification design of elderly community

Jiahui Wang, Chen Yu, Yifei Yu, and Xueqin Jiang

College of Art and Design, Jiangxi Institute of Fashion Technology, Nanchang, People’s Republic of China

E-mail: wangjiahui202499@163.com

Received: 26 October 2024  Accepted: 6 March 2025

Abstract:

Antibiotic contaminants such as tetracycline hydrochloride (TC) in landscape water of elderly communities threaten health. Antibiotics degradation in water purification leads to better environment. TC degradation by heterojunction nanocomposite for activating peroxymonosulfate (PMS) is significant. Here, MnO₂/BiVO₄ nanocomposite catalysts were prepared by sonication and heat treatment. MnO₂ particles with 6–8 nm of size were uniformly distributed on BiVO₄ to favor rapid recombination of electron/hole pairs to improve the efficiency of PMS activation. Photocatalytic system with MnO₂/BiVO₄ nanocomposite catalyst achieved efficient TC degradation. Optimal TC degradation conditions were [catalyst] = 0.2 g, [PMS] = 0.15 g and pH = 7. Electron paramagnetic resonance (EPR) and scavenger studies verified the occurrence of ·OH, SO₄^·−, ¹O₂, h⁺, ·O₂⁻ and e⁻ species and positive contribution of MnO₂/BiVO₄ nanocomposite to PMS activation. MnO₂/BiVO₄ nanocomposite exhibits good reusability in catalytic reactions. This work provides suitable photocatalytic materials for TC treatment in senior community landscape water.

Keywords: Antibiotics degradation; Landscape-water purification; Senior community; PMS activation; Heterojunction photocatalysts

Full paper is available at www.springerlink.com.

DOI: 10.1007/s11696-025-04006-7

Chemical Papers 79 (5) 3309–3321 (2025)