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.
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 （A 〈387nm） 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.
出处
《环境化学》
CAS
CSCD
北大核心
2009年第2期202-205,共4页
Environmental Chemistry
基金
国家重点基础研究发展计划(No.2008CB417206)
湖北省青年杰出人才基金(No.2005ABB030)
湖北省高等学校优秀中青年科技创新团队计划(No.T200703)资助项目
关键词
TIO2纳米管
光催化
降解
有机污染物
TiO2 nanotube, photo-catalytic, degradation, organic pollutants.
