球形介孔二氧化钛的合成与表征  

Synthesis and Characterization of Mesoporous Spherical Titanium Dioxide

作　　者：杨宏伟 王小娟[1] 王婷婷 闫文志 高学理[1] 苏保卫[1] YANG Hongwei;WANG Xiaojuan;WANG Tingting;YAN Wenzhi;GAO Xueli;SU Baowei(Key Laborulory of Marine Chemistry Theory and Technology,Minisiry of Education of China,Ocean Universiy of China,College of Chemistry and Chemical Engineering,Ocean Unirersily of Chinan Qingdao 266100,China;Tiamjin Bohai Marrine Monitoring and Sureilnce Management Center,Tiajin 300480,China;Shandong Zhajin Motian Co.Ltd.,Zhaoyuan 265400,China)

机构地区：[1]中国海洋大学化学化工学院,中国海洋大学海洋化学理论与工程技术教育部重点实验室,山东青岛266100 [2]天津市渤海海洋监测监视管理中心,天津300480 [3]山东招金膜天股份有限公司,山东招远265400

出　　处：《水处理技术》2020年第5期71-74,86,共5页Technology of Water Treatment

基　　金：国家自然科学基金(21576250);中央高校基本科研业务费专项(201822012);山东省“泰山学者”建设工程专项。

摘　　要：以十六胺(HDA)为结构导向剂,钛酸异丙酯(TIP)为钛源,无水乙醇为溶剂,采用溶胶-凝胶法制备球形介孔二氧化钛(TiO2),考察制备条件对其形貌的影响,采用扫描电子显微镜、X射线衍射仪和全自动比表面积测量仪等对样品进行表征。结果表明:HDA添加量改变胶束数量,KCl含量改变溶液离子强度,TIP和H2O添加量改变水解、缩合速度,溶剂种类和温度影响水解产物扩散速度,均会对样品形貌造成影响;合成的前驱体是无定型TiO2,500℃下经过2 h的高温煅烧后,TiO2的晶型由无定型转变为锐钛矿型,比表面积由7.34 m^2/g增大到33.51 m^2/g,吸附-脱附等温线由Ⅲ型等温线转变为Ⅳ型等温线,最概然孔径为3.794 nm。Mesoporous spherical titanium dioxide(TiO2)was prepared by sol-gel method with hexadecylamine(HDA)as the structure-directing agent,titanium(IV)isopropoxide(TIP)as the titanium source,and absolute ethanol as the solvent.The effects of preparation conditions on the morphology of spherical TiO2 were investigated.The spherical TiO2 was characterized by SEM,XRD and BET.The results showed that,the HDA dosage changed the amount of micelles,and the KCl content changed the ionic strength,and the hydrolysis and condensation rate were determined by the content of TIP and H2O,and the diffusion rate of hydrolysate was affected by the solvent type and temperature,which influenced the morphology of spherical TiO2;While the synthesized precursor was amorphous TiO2 and the phase transformed from amorphous to anatase crystal after calcination at 500℃for 2 h.Meanwhile,the specific surface area increased from 7.34 m^2/g to 33.51 m^2/g,the adsorption-desorption iso-therm changed from type III isotherm to type IV isotherm,and the most probable pore size was 3.794 nm.

关 键 词：溶胶-凝胶法 介孔 球形 锐钛矿型 

分 类 号：TQ032.41[化学工程]