不同水解抑制剂对纳米二氧化钛结构的影响  

Effects of different hydrolysis inhibitors on the structure of nanometer titanium dioxide

作　　者：马允[1] 马丽 MA Yun;MA Li(Department of Pharmacy,Anqing Medical College,Anqing Anhui 246052)

机构地区：[1]安庆医药高等专科学校药学系,安徽安庆246052

出　　处：《宁夏师范学院学报》2021年第7期46-50,共5页Journal of Ningxia Normal University

基　　金：安徽省高校自然科学研究重点项目(KJ2020A0885);安徽省高校优秀拔尖人才培育资助项目(gxgnfx2020140);安徽省高校省级质量工程精品线下开放课程项目(2018kfk139);安庆医药高等专科学校科学研究重点项目(ZR2019002).

摘　　要：以钛酸四丁酯为钛前驱体,乙酸、乙酰丙酮或三乙醇胺为水解抑制剂,采用改进的溶胶凝胶法于溶剂无水乙醇中合成纳米二氧化钛,通过热重、X-ray粉末衍射和扫描电镜对样品进行表征,考察不同抑制剂对二氧化钛晶型的影响.结果表明,向溶液中分别加入乙酸、乙酰丙酮或三乙醇胺后,三种抑制剂都可以有效地降低钛酸四丁酯的水解速率,对应的样品经过马弗炉450℃焙烧3 h,可得到粒径为9.2 nm、8.5 nm或7.2 nm的锐钛矿型二氧化钛.Tetrabutyl titanate was used as titanium precursor,and acetic acid,acetylacetone or triethanolamine were used as hydrolysis inhibitors.Nano-titanium oxide was synthesized by improved sol-gel method in solvent anhydrous ethanol.The samples were characterized by TG-DTG,XRD and SEM.The effects of different inhibitors on the crystal morphology of titanium oxide were investigated.The results show that when acetic acid,acetylacetone or triethanolamine were added into the solution,the hydrolysis rate of tetrabutyl titanate could be effectively reduced by the three inhibitors.The corresponding samples were calcined at 450℃for 3 h in Muffle furnace,and anatase type titanium dioxide with particle size of 9.2 nm,8.5 nm or 7.2 nm could be obtained respectively.

关 键 词：乙酸 乙酰丙酮 三乙醇胺 钛酸四丁酯 纳米二氧化钛 

分 类 号：O643.3[理学—物理化学]