TiO_2纳米管光催化还原Cr(Ⅵ)的研究  

Photocatalytic reduction of Cr(Ⅵ) over TiO_2 nanotubes

作　　者：陈丹[1] 潘红飞[1] 辛钢[1] 

机构地区：[1]大连理工大学化工与环境生命学部,大连116024

出　　处：《环境化学》2012年第5期658-662,共5页Environmental Chemistry

基　　金：教育部留学回国人员科研启动基金;中央高校基本科研业务专项资金(DUT10LK30)资助

摘　　要：以水热法制备TiO2纳米管,采用X射线衍射仪(XRD),高分辨透射电子显微镜(HRTEM)和紫外可见漫反射光谱对其结构和性质进行了表征.研究了光催化还原溶液中Cr(Ⅵ)的反应活性,分别考察了煅烧温度、反应溶液的pH、助催化剂对TiO2纳米管光催化还原的影响.实验结果表明,TiO2-550光催化活性最优;酸性条件有利于Cr(Ⅵ)的还原;NiO和Co2O3复合的TiO2-550光催化活性明显提高.In this study TiO2 nanotubes（TiO2NTs） were synthesized using the hydrothermal method,and characterized by XRD,HRTEM and UV-Vis diffuse reflectance spectra.Photocatalytic activity of TiO2 NTs was evaluated by the photocatalytic reduction of Cr（Ⅵ）.The dependence of photocatalytic activity of TiO2 NTs on the calcination temperature,pH and cocatalyst loading was studied.The results indicate that TiO2-550 showed the highest photocatalytic activity,and the acidic condition contributes to the reduction of Cr（Ⅵ）.In addition,the photocatalytic activity of TiO2-550 was improved by loading with NiO and Co2O3.

关 键 词：TIO2纳米管 Cr(Ⅵ) 光催化还原 

分 类 号：X703[环境科学与工程—环境工程] O643.32[理学—物理化学]