title: Electrochemical degradation of nitrobenzene by anodic oxidation on the constructed TiO2-NTs/SnO2-Sb/PbO2 electrode.
abstract: The interlayer of Sb-doped SnO2 (SnO2-Sb) and TiO2 nanotubes (TiO2-NTs) on Ti has been introduced into the PbO2 electrode system with the aim to reveal the mechanism of enhanced electrochemical performance of TiO2-NTs/SnO2-Sb/PbO2 electrode. In contrast with the traditional Ti/SnO2-Sb/PbO2 electrode, the constructed PbO2 electrode has a more regular and compact morphology with better oriented crystals of lower size. The TiO2-NTs/SnO2-Sb interlayer prepared by electrodeposition process improves PbO2 coating structure effectively, and enhances the electrochemical performance of PbO2 electrode. Kinetic analyses indicated that the electrochemical oxidation of nitrobenzene on the PbO2 electrodes followed pseudo-first-order reaction, and mass transport was enhanced at the constructed electrode. The accumulation of nitrocompounds of degradation intermediates on constructed electrode was lower, and almost all of the nitro groups were eliminated from aromatic rings after 6h of electrolysis. Higher combustion efficiency was obtained on the constructed TiO2-NTs/SnO2-Sb/PbO2 electrode. The intermediates of nitrobenzene oxidation were confirmed by IC and GC/MS.
authors: Jiangsu Key Laboratory of Environmental Engineering, Jiangsu Provincial Academy of Environmental Science, Nanjing 210036, China; School of Environmental and Biological Engineering, Nanjing University of Science and Technology, Nanjing 210094, Jiangsu Province, China. Electronic address: yong.chen@hotmail.com.
authors: Yong
authors: Y
authors: Chen
authors: School of Environmental and Biological Engineering, Nanjing University of Science and Technology, Nanjing 210094, Jiangsu Province, China; Department of Environmental Engineering, Nanjing Institute of Technology, Nanjing 211167, Jiangsu Province, China.
authors: Hongyi
authors: H
authors: Li
authors: Jiangsu Key Laboratory of Environmental Engineering, Jiangsu Provincial Academy of Environmental Science, Nanjing 210036, China.
authors: Weijing
authors: W
authors: Liu
authors: Jiangsu Key Laboratory of Environmental Engineering, Jiangsu Provincial Academy of Environmental Science, Nanjing 210036, China.
authors: Yong
authors: Y
authors: Tu
authors: Jiangsu Key Laboratory of Environmental Engineering, Jiangsu Provincial Academy of Environmental Science, Nanjing 210036, China.
authors: Yaohui
authors: Y
authors: Zhang
authors: School of Environmental and Biological Engineering, Nanjing University of Science and Technology, Nanjing 210094, Jiangsu Province, China.
authors: Weiqing
authors: W
authors: Han
authors: School of Environmental and Biological Engineering, Nanjing University of Science and Technology, Nanjing 210094, Jiangsu Province, China. Electronic address: wanglj@njust.edu.cn.
authors: Lianjun
authors: L
authors: Wang
mesh_terms: D000965:Antimony / Q000737:chemistry; D055664:Electrochemical Techniques / Q000379:methods*; D004566:Electrodes; D052918:Environmental Restoration and Remediation / Q000379:methods*; D008401:Gas Chromatography-Mass Spectrometry; D007700:Kinetics; D007854:Lead / Q000737:chemistry; D043942:Nanotubes / Q000737:chemistry; D009578:Nitrobenzenes / Q000737:chemistry*; D010084:Oxidation-Reduction; D017971:Tin Compounds / Q000737:chemistry; D014025:Titanium / Q000737:chemistry; D062065:Wastewater / Q000737:chemistry*; D018508:Water Purification / Q000379:methods*
chemical_list: D000965:Antimony; D007854:Lead; D009578:Nitrobenzenes; D017971:Tin Compounds; D014025:Titanium; D062065:Wastewater; C009495:titanium dioxide; C036077:nitrobenzene
keywords: Constructed PbO(2) electrode; Electrochemical oxidation; Enhanced mechanism; Hydroxyl radicals; Nitrobenzene