Back to Search Start Over

The electron shuttle of aloe-emodin promotes the Cu-FeOOH solid solution photocatalytic membrane to activate hydrogen peroxide for the degradation of tannic in traditional Chinese medicine wastewater.

Authors :
Zhu, Mengzhen
Li, Jiajia
Chen, Manhua
Liu, Yulu
Mei, Qiong
Liu, Hongbo
Tang, Yuping
Wang, Qizhao
Source :
Applied Catalysis B: Environmental. Feb2025, Vol. 361, pN.PAG-N.PAG. 1p.
Publication Year :
2025

Abstract

The inactive macromolecular substances would result in the membrane fouling and reduce the membrane flux in treating traditional Chinese medicine wastewater. Here, we report a novel photocatalytic membrane and utilize aloe-emodin (AE) as electron shuttle synergistically doped into Cu-FeOOH solid solution, then support the photocatalyst AE/Cu-FeOOH on PVDF membrane, which can effectively degrade tannic (95.69 %, 60 min). Furthermore, even after 6 hours of tannic solution filtration, the membrane maintains a high flux of 517 L m−2 h−1 bar−1. Combined with various spectral and photoelectric performance tests confirmed that AE/Cu-FeOOH-PVDF possesses high separation and transfer efficiency of photogenerated carriers. Meanwhile DFT calculation showed that the composite has better adsorption properties and H 2 O 2 activation ability. AE provided e− to Cu-FeOOH, which accelerated the redox reaction process of Fe and Cu ions and produced more stable active free radicals to degrade tannic. This study provides a more environmentally friendly approach for utilizing photocatalytic membranes in the treatment of traditional Chinese medicine wastewater. [Display omitted] • Electron shuttle medium AE doped Cu-FeOOH solid solution improved the conversion efficiency of Fe3+ to Fe2+. • AE/Cu-FeOOH-PVDF/H 2 O 2 effectively degraded tannin in complex Chinese medicine wastewater environment. • The mechanism of H 2 O 2 activation, ROS generation and tannin decomposition were elucidated. • It offers a fresh perspective of photocatalytic membranes in the treatment of wastewater from traditional Chinese medicine. [ABSTRACT FROM AUTHOR]

Details

Language :
English
ISSN :
09263373
Volume :
361
Database :
Academic Search Index
Journal :
Applied Catalysis B: Environmental
Publication Type :
Academic Journal
Accession number :
180422260
Full Text :
https://doi.org/10.1016/j.apcatb.2024.124566