title: Enhanced bioelectricity generation and azo dye treatment in a reversible photo-bioelectrochemical cell by using novel anthraquinone-2,6-disulfonate (AQDS)/MnOx-doped polypyrrole film electrodes.
abstract: A novel anthraquinone-2,6-disulfonate/MnOx-doped polypyrrole film (AQDS/Mn/PPy) electrode was prepared by one-step electropolymerization method and was used to improve performance of a reversible photo-bioelectrochemical cell (RPBEC). The RPBEC was operated in polarity reversion depended on dark/light reaction of alga Chlorella vulgaris by which sequential decolorization of azo dye and mineralization of decolorization products coupled with bioelectricity generation can be achieved. The results showed that formation of uniform AQDS/Mn/PPy film significantly enhanced electroactive surface area and electrocatalytic activity of carbon electrode. The RPBEC with AQDS/Mn/PPy electrodes demonstrated 77% increases in maximum power and 73% increases in Congo red decolorization rate before polarity reversion, and 198% increases in maximum power and 138% increases in decolorization products mineralization rate after polarity reversion, respectively, compared to the RPBEC with bare electrode. This was resulted from simultaneous dynamics improvement in half-reaction rate of anode and photo-biocathode due to enhanced electron transfer and algal-bacterial biofilm formation.
authors.affiliation: School of Environmental Science and Engineering, Institute of Environmental Health and Pollution Control, Guangdong University of Technology, Guangzhou 510006, China. Electronic address: sunjian472@163.com.
authors.forename: Jian
authors.initials: J
authors.lastname: Sun
authors.affiliation: School of Environmental Science and Engineering, Institute of Environmental Health and Pollution Control, Guangdong University of Technology, Guangzhou 510006, China.
authors.forename: Bihai
authors.initials: B
authors.lastname: Cai
authors.affiliation: School of Environmental Science and Engineering, Institute of Environmental Health and Pollution Control, Guangdong University of Technology, Guangzhou 510006, China.
authors.forename: Wenjing
authors.initials: W
authors.lastname: Xu
authors.affiliation: School of Environmental Science and Engineering, Institute of Environmental Health and Pollution Control, Guangdong University of Technology, Guangzhou 510006, China.
authors.forename: Yu
authors.initials: Y
authors.lastname: Huang
authors.affiliation: School of Environmental Science and Engineering, Institute of Environmental Health and Pollution Control, Guangdong University of Technology, Guangzhou 510006, China.
authors.forename: Yaping
authors.initials: Y
authors.lastname: Zhang
authors.affiliation: Department of Environmental Science and Engineering, Tunghai University, Taichung 40704, Taiwan.
authors.forename: Yenping
authors.initials: Y
authors.lastname: Peng
authors.affiliation: School of Environmental Science and Engineering, Institute of Environmental Health and Pollution Control, Guangdong University of Technology, Guangzhou 510006, China.
authors.forename: Kenlin
authors.initials: K
authors.lastname: Chang
authors.affiliation: School of Environmental Science and Engineering, Institute of Environmental Health and Pollution Control, Guangdong University of Technology, Guangzhou 510006, China.
authors.forename: Jiahong
authors.initials: J
authors.lastname: Kuo
authors.affiliation: Department of Civil Engineering, National Chi Nan University, Nantou 54561, Taiwan.
authors.forename: Kufan
authors.initials: K
authors.lastname: Chen
authors.affiliation: School of Environmental Science and Engineering, Institute of Environmental Health and Pollution Control, Guangdong University of Technology, Guangzhou 510006, China.
authors.forename: Xunan
authors.initials: X
authors.lastname: Ning
authors.affiliation: School of Environmental Science and Engineering, Institute of Environmental Health and Pollution Control, Guangdong University of Technology, Guangzhou 510006, China.
authors.forename: Guoguang
authors.initials: G
authors.lastname: Liu
authors.affiliation: School of Environmental Science and Engineering, Institute of Environmental Health and Pollution Control, Guangdong University of Technology, Guangzhou 510006, China.
authors.forename: Yujie
authors.initials: Y
authors.lastname: Wang
authors.affiliation: School of Environmental Science and Engineering, Institute of Environmental Health and Pollution Control, Guangdong University of Technology, Guangzhou 510006, China.
authors.forename: Zuoyi
authors.initials: Z
authors.lastname: Yang
authors.affiliation: School of Environmental Science and Engineering, Institute of Environmental Health and Pollution Control, Guangdong University of Technology, Guangzhou 510006, China.
authors.forename: Jingyong
authors.initials: J
authors.lastname: Liu
mesh_terms: D000880:Anthraquinones / Q000737:chemistry*; D001391:Azo Compounds / Q000302:isolation & purification*; D001674:Bioelectric Energy Sources; D018441:Biofilms; D048408:Chlorella vulgaris / Q000378:metabolism; D004396:Coloring Agents / Q000302:isolation & purification*; D004560:Electricity; D004566:Electrodes; D017895:Manganese Compounds / Q000737:chemistry*; D010087:Oxides / Q000737:chemistry*; D010777:Photochemistry / Q000295:instrumentation*; D011108:Polymers / Q000737:chemistry*; D011758:Pyrroles / Q000737:chemistry*; D013499:Surface Properties
chemical_list: D000880:Anthraquinones; D001391:Azo Compounds; D004396:Coloring Agents; D017895:Manganese Compounds; D010087:Oxides; D011108:Polymers; D011758:Pyrroles; C408124:anthraquinone-2,6-disulfonate; C067635:polypyrrole; C027424:manganese oxide
keywords: Azo dye; Composite film electrode; Dynamics improvement; Electric energy recovery; Reversible photo-bioelectrochemical cell