Pr_2O_3/TiO_2纳米粒子的制备及其US/UV协同催化降解苯酚的研究  

Preparation of Pr_2O_3/TiO_2 Nano-Particles and Degradation of Phenol by US/UV Synergetic Catalysis Technology

作　　者：张俊卿[1] 赵团[1] 冯德荣[2] 郭军平[3] 

机构地区：[1]内蒙古科技大学材料与冶金学院 [2]包头明天科技股份有限公司,内蒙古包头014010 [3]天津和平海湾电源集团有限公司,天津300384

出　　处：《中国稀土学报》2006年第z2期73-75,共3页Journal of the Chinese Society of Rare Earths

摘　　要：以钛酸丁酯为原料,用溶胶-凝胶(Sol-gel)法制备了Pr2O3/TiO2纳米粒子。采用X光衍射仪对粉体的物相进行了表征。样品经500℃焙烧2 h后,0.5%(摩尔分数)Pr3+-TiO2纳米粉末为单一的锐钛型结构。研究了US(超声波)/UV(紫外光)协同催化氧化水中苯酚的降解效果,考察了超声波声强、溶液pH值、反应温度和催化剂投加量对苯酚降解速率的影响。研究结果表明:US/UV协同催化氧化要比单独超声波或光化学处理效果显著,证实了声光联合技术具有明显的协同效应。Pr_2O_3/TiO_2 nano-powder was obtained from tetrabutyl titanate by solgel method.The phase and size were analyzed by XRD.After calcination at 500 ℃ for 2 h,0.5%(mole fraction)Pr^(3+)/TiO_2 powders show that the nanocrystalline TiO_2 with anatase phase.Phenol solution was treated by US(Ultrasound)/UV(Ultraviolet) synergetic catalysis technology and the major influencing factors such as the sound intensity,initial pH value of solution,the amount of catalyst and reaction temperature were examined in this paper.The result shows that US/UV synergetic technology is superior to each of ultrasound irradiation and photochemistry alone.The significant synergetic effect of US/UV is identified.

关 键 词：溶胶-凝胶 Pr2O3/TiO2 苯酚 US(超声波)/UV(紫外光) 催化剂 协同效应 

分 类 号：TQ134.1[化学工程—无机化工]