水解氧化锌纳米复合结构光催化降解性能研究  

Study on Photocatalytic Performance of Hydrolyzated Zinc Oxide Nano-structures

作　　者：丁浩冉[1] 王树林[1] 

机构地区：[1]上海理工大学动力学院化工过程机械研究所,上海200093

出　　处：《材料工程》2008年第10期197-199,203,共4页Journal of Materials Engineering

基　　金：国家自然科学基金(50575147)

摘　　要：利用滚压振动磨在干法室温条件下制备出形状规则的纳米锌粉,在260℃下与水蒸汽接触发生水解氧化还原反应,得到氧化锌纳米复合结构。其特征是棒状和块状纳米结构共存,具有良好的分散性,氧和锌的原子比接近2∶3。将这种复合纳米结构用于光催化降解甲基橙溶液,在距离40cm的20W紫外灯照射下,研究了不同初始浓度、光催化剂添加量和水解温度对氧化锌纳米复合结构光催化降解性能的影响。在50mL初始浓度为10mg/L的甲基橙溶液中,添加260℃下水解生成的氧化锌纳米复合结构400mg,在10min内降解率可达80%以上。The roller vibration milling was used to manufacture Zinc nanoparticles with wurtzite hexa- gonal phase in dry mode and at room temperature, then hydrolyzed zinc nanoparticles with water vapour at 260℃ to obtain ZnO nanostructure or hybrid of ZnO and Zn nanostructures. Results show that the nano-structures synthesized at 260℃ have great dispersivity featuring nano-flakes with nanorods, that containing about 60% Zn atoms and 40% O atoms. Using the produced hybrid nanostructures as catalyst, exposed the 20mg/L methyl orange solution to a UV source light of 20W with distance of 40 cm, then problems about how the original centigrade, catalyst addition and hydrogen temperature influenced the photocatalytic performance of the hybrid nanostructures were studied. Once added 400mg catalyst into 50mL 10mg/L methyl orange solution, exposed to a 20W UV source for 10min, the decomposition degree rised above 80%. The findings were proved to provide a new way to enhance the decomposition of dye wastewater by nanostructures.

关 键 词：氧化锌 纳米复合结构 水解 光催化降解 甲基橙 

分 类 号：TB33[一般工业技术—材料科学与工程] O611[理学—无机化学]