TiO2纳米管半波脉冲直流电光电催化还原Cr(Ⅵ)

CORC > 北京大学 > 环境科学与工程学院

	TiO2纳米管半波脉冲直流电光电催化还原Cr(Ⅵ); Photoelectrocatalytic Reduction of Cr（Vl） over TiO2 Nanotube Arrays under Half-wave Pulsed Direct Current
	汪青 ; 尚静 ; 宋寒
刊名	化学学报
	2012
关键词	TiO2纳米管半波脉冲直流电交流电光电催化还原 Cr(VI) TiO2 nanotubes Cr(VI) half-wave pulsed direct current alternate current photoelectrocatalytic reduction
英文摘要	报道了在半波脉冲直流电（h-DC）作为电压驱动下,以阳极氧化法制备的TiO2纳米管（TNT）为工作电极,紫外光光电催化（PEC）还原Cr（VI）的研究.半波脉冲直流电相比稳压直流电（DC）和交流电（AC）具有更佳的载流子分离和光电催化作用.探讨了电压大小、频率及电解质NaCl浓度对Cr（VI）催化还原反应的影响.TNT光电催化和电催化还原Cr（VI）效率随外加电压和频率的增大而增大,但是频率过高对反应有一定的抑制作用.电解质NaCl对反应的影响不显著,这是因为在重金属还原体系中,NaCl作为活性氯物种的母体和增强溶液导电性的作用体现得不明显.; In this paper,the photoelectrocatalytic（PEC） reduction of Cr（VI） over anodized TiO2 nanotube arrays under UV-light irradiation using the half-wave pulsed direct current（h-DC） as the applied voltage was reported.This mode of voltage brings about better separation of photogenerated electrons and holes,resulting in much higher photoelectrocatalytic efficiency than either the conventional direct current（DC） or the alternate current（AC）.Under the half-wave pulsed direct current,the influence factors such as the value and frequency of the voltage,also concentration of the electrolyte（NaCl）,on the PEC reduction of Cr（VI） were investigated.The PEC reduction rate increased with increasing voltage and frequency,but could be restrained by a high frequency.The concentration of NaCl exhibited little effect on the PEC reduction reaction of Cr（VI）,for the weak function of active chlorine species and electric conduction in the heavy metal reduction system.; 国家自然科学基金; 国家重点基础研究发展计划(973计划)(No.2002CB410802)}~境模拟与污染控制国家重点联合实验室(北京大学)专项资助项目; http://gateway.webofknowledge.com/gateway/Gateway.cgi?GWVersion=2&SrcApp=PARTNER_APP&SrcAuth=LinksAMR&KeyUT=WOS:000301637400007&DestLinkType=FullRecord&DestApp=ALL_WOS&UsrCustomerID=8e1609b174ce4e31116a60747a720701 ; SCI(E); 中文核心期刊要目总览(PKU); 中国科技核心期刊(ISTIC); 中国科学引文数据库(CSCD); 1; 4; 405-410; 70
语种	中文
内容类型	期刊论文
源URL	[http://ir.pku.edu.cn/handle/20.500.11897/4207]
专题	环境科学与工程学院
推荐引用方式 GB/T 7714	汪青,尚静,宋寒. TiO2纳米管半波脉冲直流电光电催化还原Cr(Ⅵ), Photoelectrocatalytic Reduction of Cr（Vl） over TiO2 Nanotube Arrays under Half-wave Pulsed Direct Current[J]. 化学学报,2012.
APA	汪青,尚静,&宋寒.(2012).TiO2纳米管半波脉冲直流电光电催化还原Cr(Ⅵ).化学学报.
MLA	汪青,et al."TiO2纳米管半波脉冲直流电光电催化还原Cr(Ⅵ)".化学学报 (2012).