摘要
采用水热合成方式,以钛酸丁酯、四氯化钛等作为钛源,聚乙二醇作为溶剂,在添加水解抑制剂和剧烈搅拌的基础上缓慢滴入一定量含有固定配比的参杂金属离子的去离子水形成溶胶,停止搅拌并陈化形成透明淡蓝色凝胶备用。用含有SiO_(2)晶种的富含羟基的中强酸在常温条件下缓慢将上述过程得到的凝胶进行解胶和反应,得均匀透明溶液,移入含有固定无机分散剂配比的去离子中,搅拌均匀,制得纳米二氧化钛分散液。后续可根据要求稀释:加入去离子水进行浓度调整,加入氨水进行pH调节,调节范围可达2~9。采用该法方式制备的纳米二氧化钛纳米粒径可在10 nm以内,该技术克服现有光催化剂依赖紫外光无法全天候工作、室内光催化效率低下、被动接收、处理时间延长的缺点,使之具备低耗高效、环境友好、使用简单等优势。并且设备投入小、生产条件温和,搅拌机及常温反应釜就可以进行大规模的生产制备。
Hydrothermal synthesis method is adopted.Butyl titanate,titanium tetrachloride,etc.are used as titanium source,polyethylene glycol is used as solvent,and a certain amount of deionized water containing mixed metal ions of fixed ratio is slowly dropped on the basis of adding hydrolysis inhibitor and vigorous stirring to form sol.Stop stirring and aging to form transparent light blue gel for standby.The gel obtained from the above process is slowly degummed and reacted with a medium strong acid containing SiO_(2) crystal seeds and rich in hydroxyl under normal temperature to obtain a uniform transparent solution,which is then transferred into the deionized solution containing a fixed inorganic dispersant ratio and stirred evenly to obtain a nano titanium dioxide dispersion.Subsequently,dilution can be carried out according to the requirements:adding deionized water for concentration adjustment,adding ammonia water for pH adjustment,with a range of adjustment up to range of 2 to 9.The diameter of nano titanium dioxide nanoparticles prepared by this method can be within 10nm.This technology overcomes the shortcomings of existing photocatalysts that rely on ultraviolet light and cannot work 24/7,low indoor photocatalytic efficiency,passive reception,and extended processing time,making it low consumption,high efficiency,environmentally friendly,and easy to use.And with small equipment investment and mild production conditions,mixers and room temperature reaction kettles can be used for large-scale production preparation.
作者
张景
姚州威
ZHANG Jing;YAO Zhouwei(Shenzhen Tiandeiyi Environmental Technology Co.,Ltd.,Guangdong Shenzhen 518000,China)
出处
《广州化工》
CAS
2024年第24期192-195,共4页
GuangZhou Chemical Industry
关键词
水热法
纳米TiO_(2)
液体分散
生产条件
hydrothermal method
nano TiO_(2)
liquid dispersion
production conditions
作者简介
第一作者:张景(1988-),男,本科,中级工程师,主要从事环保材料及环保治理设备方向研究。
