Ag/TiO_2复合材料的制备及其对碘离子的吸附研究  

STUDY ON PREPARATION OF Ag/TiO_2 COMPOSITE MATERIALS AND ITS ADSORPTION PROPERTIES FOR IODINE IONS

作　　者：张煜昌[1] 王娜[1] 那平[1] 

机构地区：[1]天津大学化工学院,天津300072

出　　处：《离子交换与吸附》2013年第4期296-305,共10页Ion Exchange and Adsorption

基　　金：国家自然科学基金;国家高技术研究发展计划

摘　　要：利用水解法制备了具有刺状表面结构的球形二氧化钛基体材料,并采用紫外光解法获得了均匀负载的Ag/TiO2材料。利用扫描电子显微镜(SEM)、色散谱(EDS)、傅里叶变换红外光谱仪(FT-IR)和BET等技术手段对材料的结构、形貌、组成成分及比表面积进行了分析表征。开展了Ag/TiO2复合材料对溶液中碘离子的吸附实验研究,考察并讨论了pH值以及共存离子(Cl-、F-、NO3-、SO42-和CO32-)对吸附的影响,结果表明,Ag/TiO2复合材料具有耐酸性强、吸附选择性高、吸附容量大(207mg/g)等特性。Thorn-like spherical TiO2 matrix material was pre, pared by hydrolysis, and then the composite materials with uniform supported structure of Ag/TiO2 were obtained by ultraviolet photolysis. The structure, morphology, composition and specific surface area of Ag/TiO2 were characterized by Scanning Electron Microscope （SEM）, Energy Dispersive Spectroscopy （EDS）, Fourier Transform Infrared （FT-IR） spectroscopy and BET, respectively. The adsorption of iodine ions on Ag/TiO2 was discussed and the effects of pH value and coexisting ions （CI-, F, NO3, SO42- and CO32-） on adsorption capacity were investigated. The results indicated that the composite materials had better resistance to strong acid and strong base, higher adsorption selectivity and higher adsorption capacity （up to 207mg/g）.

关 键 词：刺状球形 TIO2 AG/TIO2 吸附 碘离子 

分 类 号：TQ424[化学工程]