title: Enhanced organic pollutants degradation and electricity production simultaneously via strengthening the radicals reaction in a novel Fenton-photocatalytic fuel cell system.
abstract: An enhanced result in organic pollutants degradation and simultaneous electricity production has been achieved by establishing a novel Fenton-photocatalytic fuel cell (Fenton-PFC) system in which TiO2nanotube arrays (TNA) was designed as a photoanode and ferrous ions were added. The proposed Fenton-PFC system can expand the radical reaction for organic pollutants degradation from the surface of electrodes to the whole solution system due to a continuous photoelectric Fenton reaction without continually adding any external voltage and ferrous ions. The cyclic reactions between ferrous ions (Fe2+/Fe3+) and radicals and related species (HO, HO2, O2-and H2O2etc.) can be achieved at electrodes surface via a self-bias voltage yielded by the PFC. More importantly, the proposed Fenton-PFC system has hardly any sludge due to an effective radical reaction using a small amount of ferrous ions. The degradation rate of refractory organics, such as methyl orange, methylene blue, congo red and tetracycline, increased from 34.99%, 43.75%, 40.58% and 34.40% (the traditional PFC without Fe2+) to 97.34%, 95.36%, 93.23% and 73.80% (the Fenton-PFC within Fe2+) respectively after 60 min operation. Meanwhile, the electricity generation is up to 1.21-2.04 times larger than the traditional PFC. The proposed Fenton-PFC system provides a more economical and efficient way for energy recovery and wastewater treatment.
authors.affiliation: School of Environmental Science and Engineering, Shanghai Jiao Tong University No. 800 Dongchuan Rd, Shanghai 200240, PR China.
authors.forename: Kai
authors.initials: K
authors.lastname: Zhao
authors.affiliation: School of Environmental Science and Engineering, Shanghai Jiao Tong University No. 800 Dongchuan Rd, Shanghai 200240, PR China.
authors.forename: Qingyi
authors.initials: Q
authors.lastname: Zeng
authors.affiliation: School of Environmental Science and Engineering, Shanghai Jiao Tong University No. 800 Dongchuan Rd, Shanghai 200240, PR China. Electronic address: bai_jing@sjtu.edu.cn.
authors.forename: Jing
authors.initials: J
authors.lastname: Bai
authors.affiliation: School of Environmental Science and Engineering, Shanghai Jiao Tong University No. 800 Dongchuan Rd, Shanghai 200240, PR China.
authors.forename: Jinhua
authors.initials: J
authors.lastname: Li
authors.affiliation: School of Environmental Science and Engineering, Shanghai Jiao Tong University No. 800 Dongchuan Rd, Shanghai 200240, PR China.
authors.forename: Ligang
authors.initials: L
authors.lastname: Xia
authors.affiliation: School of Environmental Science and Engineering, Shanghai Jiao Tong University No. 800 Dongchuan Rd, Shanghai 200240, PR China.
authors.forename: Shuai
authors.initials: S
authors.lastname: Chen
authors.affiliation: School of Environmental Science and Engineering, Shanghai Jiao Tong University No. 800 Dongchuan Rd, Shanghai 200240, PR China; Key Laboratory of Thin Film and Microfabrication Technology, Ministry of Education, Shanghai 200240, PR China. Electronic address: zhoubaoxue@sjtu.edu.cn.
authors.forename: Baoxue
authors.initials: B
authors.lastname: Zhou
mesh_terms: D003224:Congo Red; D004560:Electricity; D004566:Electrodes; D006861:Hydrogen Peroxide; D007501:Iron; D062065:Wastewater; D014874:Water Pollutants, Chemical
chemical_list: D003224:Congo Red; D006861:Hydrogen Peroxide; D007501:Iron; D062065:Wastewater; D014874:Water Pollutants, Chemical
keywords: Electricity generation; Fenton; PFC; Refractory organics degradation; Self-bias