TiO2纳米管的制备和光催化降解有毒有机污染物
- 1. 三峡大学艾伦·麦克德尔米德再生能源研究所, 宜昌, 443002
摘要: 采用水热法制备TiO2纳米管,利用透射电子显微镜(TEM)、扫描电子显微镜(SEM)、X射线衍射仪(XRD)对TiO2纳米管进行表征.并以有机染料罗丹明B(RhB)和2,4-二氯苯酚(2,4-DCP)进行光催化反应,结果表明,TiO2纳米管催化剂对RhB和2,4-DCP有很好的降解效果.通过紫外-可见光谱(UV-Vis)、红外光谱(FTIR)分析和总有机碳(TOC)测定,发现TiO2纳米管/UV体系能使RhB和2,4-DCP发生有效的降解,反应12h后,RhB和2,4-DCP的矿化率分别达到100%和97.12%.同时,采用辣根过氧化物酶(POD)、N,N-二乙基对苯二胺(DPD)分光光度法和苯甲酸荧光光度法分别测定了降解过程中H2O2和羟基自由基(·OH)的变化,表明TiO2纳米管光催化机理涉及到·OH历程.
PREPARATION OF TiO2 NANOTUBE AND PHOTODEGRADATION OF TOXIC ORGANIC POLLUTANTS
- 1. Alan G. MacDiarmid Research Institute for Renewable Energy, China Three Gorges University, Yichang, 443000, China
- Received Date:
2008-04-25
Fund Project:
Abstract: TiO2 nanotube were prepared in hydro-themeral method.The characteristics of TiO2 nanotube were carried out using transmission electron mixroscopy(TEM),scan electron mixroscopy(SEM)and X-ray diffraction(XRD)spectroscopy.TiO2 nanotube prepared under pH=2 had optimal using the photo-catalytic degradation experiments of organic dye Rhodamine B(RhB)and 2,4-dichlorophenol(2,4-DCP)which is a colorless and toxic as probe reactions.The TiO2 nanotube/UV(λ387nm)system had good degradation to RhB and 2,4-DCP by analysising UV-Vis,FTIR and TOC.The mineralized rates of RhB and 2,4-DCP were 100% and 97.12%,respectively after 12h.TiO2 nanotube involved·OH radical mechanism by detecting H2O2 and·OH using POD,DPD spectro-photometry and benzoic acid spectro-fluorescence analysis methods.
点击查看大图
下载:
