摘要
以钛酸四丁酯为前驱物,无水乙醇为溶剂,HAc为螯合剂,采用溶胶-凝胶法制备了纳米TiO2,并进行了红外、扫描电镜、X射线衍射表征,考察了不同条件(蒸馏水、HAc、无水乙醇、pH值)下制备的纳米TiO2对降解次甲基蓝的影响。光催化实验结果表明:在A溶液加入35mL无水乙醇;B溶液加入2mL HAc,10mL蒸馏水,pH值为1.7时,制备的纳米TiO2光催化效果最好。将制备的纳米TiO2在马弗炉中以不同的温度焙烧,光催化实验表明:最佳焙烧温度为450~500℃。将制备的纳米TiO2分别放在日光光照条件和紫外光照条件下,研究了对次甲基蓝和对硝基苯酚的光催化降解性能,光催化实验表明,在日光光照条件下对甲基蓝和对硝基苯酚的降解率分别为100%、70.12%;光催化剂在紫外光照条件下,对次甲基蓝和对硝基苯酚的降解率分别为79.54%、91.88%。
TiO2 nanoparticles were prepared by sol-gel method with tebutyltitanate as precursor,anhydrous ethanol as solvent and glacial acetic acid as chelating agent.The products were characterized with IR,SEM and XRD.The effects of nano TiO2 prepared under different conditions(distilled water,glacial acetic acid,anhydrous ethanol,pH)on degradation of methylene blue were investigated.The results of photocatalytic experiments showed that 35mL anhydrous ethanol in A solution was the best.When B solution was added with 2mL glacial acetic acid,10mL distilled water and pH=1.7,the photocatalytic performance of nano TiO2 was the best.Nano TiO2 prepared was roasted at different temperatures in muff furnace.Photocatalytic experiments showed that the optimal roasting temperature was 450-500℃.The photocatalytic degradation performance of TiO2 on methylene blue and p-nitrophenol was studied under sunlight and ultraviolet light conditions respectively.The photocatalytic experiments showed that the degradation rate of methylene blue and p-nitrophenol under sunlight conditions was 100%and 70.12%respectively.The degradation rates of p-nitrophenol and methylene blue were 79.54%and 91.88%respectively.
作者
张春晓
赵娇娇
关淑瑜
李雯
ZHANG Chun-xiao;ZHAO Jiao-jiao;GUAN Shu-yu;LI Wen(Shengli College,China University of Petroleum,Dongying 257061,China)
出处
《化学工程师》
CAS
2019年第10期4-9,共6页
Chemical Engineer
基金
中国石油大学胜利学院春晖科技计划项目(KY2018002)
关键词
纳米TIO2
光催化剂
降解
优化
废水处理
nano TiO2
photocatalyst
degradation
optimization
wastewater treatment
作者简介
张春晓(1974-),男,副教授,毕业于天津大学高分子化学与物理专业,主要从事功能高分子合成及应用研究。
