A self-cleaning and photocatalytic cellulose-fiber- supported "Ag@AgCl@MOF- cloth'' membrane for complex wastewater remediation

Wanli Lu; Chao Duan; Chaoran Liu; Yanling Zhang; Xin Meng; Lei Dai; Wenliang Wang; Hailong Yu; Yonghao Ni

doi:10.1016/j.carbpol.2020.116691

A self-cleaning and photocatalytic cellulose-fiber- supported "Ag@AgCl@MOF- cloth'' membrane for complex wastewater remediation

Carbohydr Polym. 2020 Nov 1:247:116691. doi: 10.1016/j.carbpol.2020.116691. Epub 2020 Jun 25.

Authors

Wanli Lu¹, Chao Duan², Chaoran Liu³, Yanling Zhang³, Xin Meng¹, Lei Dai¹, Wenliang Wang³, Hailong Yu⁴, Yonghao Ni³

Affiliations

¹ National Demonstration Center for Experimental Light Chemistry Engineering Education, College of Bioresources Chemical and Materials Engineering, Shaanxi Provincial Key Laboratory of Papermaking Technology and Specialty Paper Development, Shaanxi University of Science and Technology, Xi'an, 710021, China.
² National Demonstration Center for Experimental Light Chemistry Engineering Education, College of Bioresources Chemical and Materials Engineering, Shaanxi Provincial Key Laboratory of Papermaking Technology and Specialty Paper Development, Shaanxi University of Science and Technology, Xi'an, 710021, China; Department of Chemical Engineering, University of New Brunswick, Fredericton, New Brunswick E3B 5A3, Canada. Electronic address: duanchaonba@126.com.
³ National Demonstration Center for Experimental Light Chemistry Engineering Education, College of Bioresources Chemical and Materials Engineering, Shaanxi Provincial Key Laboratory of Papermaking Technology and Specialty Paper Development, Shaanxi University of Science and Technology, Xi'an, 710021, China; Department of Chemical Engineering, University of New Brunswick, Fredericton, New Brunswick E3B 5A3, Canada.
⁴ State Key Laboratory Base of Eco-Chemical Engineering, College of Chemical Engineering, Qingdao University of Science and Technology, Qingdao, 266042, China; Department of Chemical Engineering, University of New Brunswick, Fredericton, New Brunswick E3B 5A3, Canada.

PMID: 32829819
DOI: 10.1016/j.carbpol.2020.116691

Abstract

Membrane technology is one of the most promising technologies for wastewater remedy. However, it remains challenging to prepare high-performance membrane matrix for complex pollutants, e.g. containing both oil and organic dye. In this work, we facilely fabricate a cellulose-fiber-supported MOF photocatalytic membrane, namely Ag@AgCl@MIL-100(Fe)/CCF, which was prepared via carboxymethylation of cotton fabric (CCF) as scaffold and in-situ synthesis of MOF derivative as photocatalyst. The carboxymethylation significantly improves the hydrophilicity of cotton fabric and the deposition amount of MIL-100(Fe). The high hydrophilicity of modified CCF and porous MIL-100(Fe) further enable the membrane with an efficient adsorption capacity of dyes and underwater oleophobicity against oils. The photocatalysts Ag@AgCl nanoparticles anchored onto MIL-100(Fe) promote the photocatalytic activity. As a result, the membrane shows simultaneous high removal efficiency towards dyes (97.3 %) and oils (99.64 %). Additionally, thanks to the good photocatalytic activity against organic pollutants, the membrane exhibits excellent self-cleaning and a long-term reuse capacity.

Keywords: Ag@AgCl; Cotton fabric; Dye; MIL-100(Fe); Membrane; Oil/water emulsion; Photocatalysis; Wastewater remediation.