Copper nanoparticles sensitized TiO2 nanotube arrays electrode with   enhanced photoelectrocatalytic activity for diclofenac degradation

doi:10.1016/j.cej.2015.07.072

CORC > 北京大学 > 环境科学与工程学院

	Copper nanoparticles sensitized TiO2 nanotube arrays electrode with enhanced photoelectrocatalytic activity for diclofenac degradation
	Hua, Zulin ; Dai, Zhangyan ; Bai, Xue ; Ye, Zhengfang ; Wang, Peng ; Gu, Haixin ; Huang, Xin
刊名	CHEMICAL ENGINEERING JOURNAL
	2016
关键词	TiO2 nanotubes electrode Copper nanoparticles Surface sensitization Photoelectrocatalytic activity Diclofenac VISIBLE-LIGHT PHOTOCATALYTIC DEGRADATION AU NANOPARTICLES OXALIC-ACID OXIDATION HYDROGEN PERFORMANCE ELECTRICITY MECHANISM CATALYSTS
DOI	10.1016/j.cej.2015.07.072
英文摘要	Copper nanoparticles (NPs) deposited on the surface of self-organized highly ordered TiO2 nanotube arrays (Cu/TiO2 NTs) were synthesized by electrochemical anodization and the successive ionic layer adsorption and reaction technique. The morphology, elemental composition, crystallinity, light absorption ability and photoelectrochemical property of the as-prepared Cu/TiO2 NTs electrode were distinguished based on various characterizations. X-ray photoelectron spectroscopy showed that the Cu NPs existed as Cu(II)O and Cu(l)(2)O on the TiO2 surface. The current-voltage curve of Cu/TiO2 NTs electrode indicated a rectifying behavior. The surface sensitization of TiO2 NTs by CuO and Cu2O NPs enhanced the absorption of visible light. Meanwhile, the enhanced charge separation was demonstrated by electrochemical impedance spectroscopy, transient photocurrent response and photovoltage measurements. Besides, Cu/TiO2 NTs electrode showed more effective photoconversion efficiency and enhanced photoelectrocatalytic activity towards the degradation of diclofenac than pure TiO2 NTs electrode under simulated solar light irradiation, which was attributed to the synergistic effects between nanotubular structures of TiO2 and uniformly dispersed copper nanoparticles, as well as the small bias potential. Furthermore, the photoelectrocatalytic mechanism was proposed and the possible radical species involved in the photoelectrocatalytic degradation of diclofenac were analyzed by active species trapping. The CulTiO(2) NTs electrode exhibited high reusability. (C) 2015 Elsevier B.V. All rights reserved.; National Natural Science Foundation of China [51308183, 51379060, 51179052]; Natural Science Foundation of Jiangsu Province of China [BK20130828]; Fundamental Research Funds for the Central Universities [2013B32214, 2014B07814, 2014B07414]; Priority Academic Program Development of Jiangsu Higher Education Institutions; Qing Lan Project; SCI(E); EI; ARTICLE; baixue10@tsinghua.org.cn; 514-523; 283
语种	英语
内容类型	期刊论文
源URL	[http://ir.pku.edu.cn/handle/20.500.11897/422690]
专题	环境科学与工程学院
推荐引用方式 GB/T 7714	Hua, Zulin,Dai, Zhangyan,Bai, Xue,et al. Copper nanoparticles sensitized TiO2 nanotube arrays electrode with enhanced photoelectrocatalytic activity for diclofenac degradation[J]. CHEMICAL ENGINEERING JOURNAL,2016.
APA	Hua, Zulin.,Dai, Zhangyan.,Bai, Xue.,Ye, Zhengfang.,Wang, Peng.,...&Huang, Xin.(2016).Copper nanoparticles sensitized TiO2 nanotube arrays electrode with enhanced photoelectrocatalytic activity for diclofenac degradation.CHEMICAL ENGINEERING JOURNAL.
MLA	Hua, Zulin,et al."Copper nanoparticles sensitized TiO2 nanotube arrays electrode with enhanced photoelectrocatalytic activity for diclofenac degradation".CHEMICAL ENGINEERING JOURNAL (2016).