A novel copper oxide/titanium membrane integrated with peroxymonosulfate activation for efficient phenolic pollutants degradation

Huanran Ma; Guoqing Feng; Xiaoyang Li; Zonglin Pan; Ruisong Xu; Pengcheng Wang; Xinfei Fan; Chengwen Song

doi:10.1016/j.jcis.2023.07.067

A novel copper oxide/titanium membrane integrated with peroxymonosulfate activation for efficient phenolic pollutants degradation

J Colloid Interface Sci. 2023 Nov 15;650(Pt B):1052-1063. doi: 10.1016/j.jcis.2023.07.067. Epub 2023 Jul 12.

Authors

Huanran Ma¹, Guoqing Feng¹, Xiaoyang Li¹, Zonglin Pan², Ruisong Xu³, Pengcheng Wang⁴, Xinfei Fan¹, Chengwen Song⁵

Affiliations

¹ College of Environmental Science and Engineering, Dalian Maritime University, 1 Linghai Road, Dalian 116026, China.
² College of Environmental Science and Engineering, Dalian Maritime University, 1 Linghai Road, Dalian 116026, China. Electronic address: zonglinpan@dlmu.edu.cn.
³ State Key Laboratory of Fine Chemicals, School of Chemical Engineering, Dalian University of Technology, 2 Linggong Road, Dalian 116024, China. Electronic address: ruisong_xu@126.com.
⁴ Department of Mechanical Engineering, University of Houston, Houston, TX 77204, USA.
⁵ College of Environmental Science and Engineering, Dalian Maritime University, 1 Linghai Road, Dalian 116026, China. Electronic address: chengwensong@dlmu.edu.cn.

PMID: 37459729
DOI: 10.1016/j.jcis.2023.07.067

Abstract

Herein, a novel CuO catalyst functionalized Ti-based catalytic membrane (FCTM) was prepared via the regulated electro-deposition technique followed with low-temperature calcination. The morphology of CuO catalyst and oxygen vacancy (O_V) content can be controlled by adjusting the preparation conditions, under optimal condition (400 °C, electrolyte as sulfuric acid), the fern-shaped CuO catalyst was formed and the O_V content was up to its highest level. Under the optimal treatment condition, the 4-chlorophenol (4-CP) removal of the membrane filtration combined with peroxymonosulfate (PMS) activation (MFPA) process was up to 98.2% (TOC removal of 88.2%). Mechanism studying showed that the enhanced performance in this system was mainly due to the increased production of singlet oxygen (¹O₂) via the co-effect of fern-shaped CuO (increased specific surface area) and its fine-tuned O_V (precursor of ¹O₂), which not only synergistically enhanced adsorption ability but also offered more active sites for PMS activation. Theoretical calculations showed that the O_V-rich CuO displayed high adsorption energy for PMS molecule, leading to the change in OO and OH bond (tend to ¹O₂) of the PMS molecule. Finally, the possible three degradation pathways of 4-CP were formed by the electrophilic attacking of ¹O₂.

Keywords: Copper oxide; Electro-deposition; Peroxymonosulfate activation; Phenolic pollutants removal; Titanium membrane.