硝酸盐修饰TiO_2纳米粉的制备及光催化降解亚甲基蓝  

Preparation of Tetal Ion Modified TiO_2 Nanomaterials and Photocatalytic Degradation of Dyes

作　　者：华香[1] 王红军[1] 杨术明[1] HUA Xiang;WANG Hong-jun;YANG Shu-ming(College of Chemistry and Chemical Engineering,Xinyang Normal University,Henan Xinyang 464000,China)

机构地区：[1]信阳师范学院化学化工学院,河南信阳464000

出　　处：《广州化工》2018年第2期88-91,150,共5页GuangZhou Chemical Industry

基　　金：国家自然科学基金项目(NO.20773103)

摘　　要：采用水热法制备了TiO_2纳米粉以及用硝酸盐(硝酸镁、硝酸钙和硝酸锶)对TiO_2纳米粉进行表面修饰,采用XRD和SEM对其物相和形貌进行表征。将制备的硝酸盐修饰的TiO_2纳米粉用来降解亚甲基蓝。结果表明,硝酸盐修饰的TiO_2纳米粉对亚甲基蓝的降解率都有很大的提高。当硝酸盐的掺杂比例为0.75%时,对亚甲基蓝的降解率达到最大,硝酸镁、硝酸钙和硝酸锶修饰的TiO_2纳米粉的降解率分别是88%、87%和85%,而纯TiO_2纳米粉的降解率只有65%,最大提高了35%。The hydrothermal synthesis of nanocrystalline TiO 2 powder and nitrate(calcium nitrate,magnesium nitrate and strontium nitrate)surface modification of TiO 2 nano powder were reported.The phase and morphology of the prepared nanopowers were characterized by XRD and SEM.The prepared TiO 2 nano powders were applied for the degradation of methylene blue.The results showed that the efficiencies of the nitrate modified TiO 2 nano powders were greatly improved.The degradation efficiencies of methylene blue reached the highest when the doping ratio of nitrates was 0.75%,and the efficiencies were 88%,87%and 85%for magnesium nitrate,calcium nitrate and strontium nitrate respectively.The degradation efficiency of the pure TiO 2 nano powder was only 65%,so the highest efficiency was increased about 35%.

关 键 词：半导体纳米材料 硝酸盐 表面修饰 光催化降解 染料 

分 类 号：O643.3[理学—物理化学]