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Indexed by:期刊论文

Date of Publication:2017-02-01

Journal:ENVIRONMENTAL SCIENCE-NANO

Included Journals:SCIE、Scopus

Volume:4

Issue:2

Page Number:335-345

ISSN No.:2051-8153

Abstract:In this study, a photocatalytic composite membrane (PCM) coated with CoFe2O4(-rGO) and polyvinylidene fluoride (PVDF) on a carbon fiber cloth was firstly prepared by inclusion of nanoparticles in a PVDF casting solution. The PCM with CoFe2O4(-rGO) functioned as the cathode membrane in a photocatalysis-assisted MFC-MBR system. Comparison tests with four types of MFe2O4 photo-catalysts (M = Ni, Fe, Co, Zn) in PCM indicated that CoFe2O4 had the highest oxygen reduction reaction (ORR) activity. Upon compositing with reduced graphene oxide (rGO), the CoFe2O4-rGO greatly improved the catalytic activity. Photocatalysis in the cathode greatly promoted both power generation and contaminant removal. The maximum power density of 942 mW m(-3) (versus anode volume) was achieved using this PCM with CoFe2O4-rGO, under visible-light irradiation, and the removal of tetracycline hydrochloride antibiotics in a photocatalysis-assisted MFC-MBR system was higher than that without irradiation. By efficiently decomposing recalcitrant substances, the photocatalysis-assisted MFC-MBR system exhibits better and broader application potential in wastewater treatment than a conventional MFC-MBR system. The beneficial effects of nanoparticles on flux and conductivity in the PVDF casting solution were also evaluated.