Regulation of friction pair to promote conversion of mechanical energy to chemical energy on Bi2WO6 and realization of enhanced tribocatalytic activity to degrade different pollutants

Meixuan Wu; Yaning Zhang; Yuyan Yi; Baocheng Zhou; Pengfei Sun; Xiaoping Dong

doi:10.1016/j.jhazmat.2023.132147

Regulation of friction pair to promote conversion of mechanical energy to chemical energy on Bi₂WO₆ and realization of enhanced tribocatalytic activity to degrade different pollutants

J Hazard Mater. 2023 Oct 5:459:132147. doi: 10.1016/j.jhazmat.2023.132147. Epub 2023 Jul 24.

Authors

Meixuan Wu¹, Yaning Zhang¹, Yuyan Yi¹, Baocheng Zhou¹, Pengfei Sun¹, Xiaoping Dong²

Affiliations

¹ School of Chemistry and Chemical Engineering, Key Laboratory of Surface & Interface Science of Polymer Materials of Zhejiang Province, Zhejiang Sci-Tech University, 928 Second Avenue, Xiasha Higher Education Zone, Hangzhou 310018, China.
² School of Chemistry and Chemical Engineering, Key Laboratory of Surface & Interface Science of Polymer Materials of Zhejiang Province, Zhejiang Sci-Tech University, 928 Second Avenue, Xiasha Higher Education Zone, Hangzhou 310018, China. Electronic address: xpdong@zstu.edu.cn.

PMID: 37515993
DOI: 10.1016/j.jhazmat.2023.132147

Abstract

Recently, friction-induced tribocatalysis has received tremendous attention through converting mechanical energy to chemical energy. However, its efficiency is much lower than those of photocatalysis and piezocatalysis, and its environmental application is limited in dye degradation. Herein, we developed a facile approach to improve the tribocatalytic activity of Bi₂WO₆ via adding trace polymer powders to form friction pairs with Bi₂WO₆. Among various polymers, PTFE was demonstrated to be the best counterpart of Bi₂WO₆. Subsequently, the PTFE dosage, stirring rate, magnetic bar size and number, and stirring mode were further optimized. The PTFE-promoted Bi₂WO₆ tribocatalysis was verified to possess excellent performance not only for removing different dyes, but also for degrading chlorophenols that are typical persistent organic pollutants. Multiple uses of the recycled catalysts indicated its good stability and prominent tribocatalytic durability. EPR measurements suggested the generation of hydroxyl radical and superoxide radical, which were determined to be continuously generated within 12 h at the rates of 0.88 μM h^-1 and 85 μM h^-1, respectively. Subsequently, a possible mechanism was proposed to explain the enhanced performance of the PTFE-promoted Bi₂WO₆ tribocatalysis. Finally, on basis of the detected intermediates, the degradation pathways of Rhodamine B and 2,4-Dichlorophenol during tribocatalysis were suggested.

Keywords: Bi(2)WO(6); Dyes and POPs degradation; Friction pairs; PTFE; Tribocatalysis.