新型纳米材料光催化反应器研究  

Study on a New-type Photocatalytic Reactor for Nanometer Materials

作　　者：杨毅[1] 王起伟[1] 王连军[1] 

机构地区：[1]南京理工大学化工学院,南京210094

出　　处：《安全与环境工程》2009年第1期34-37,共4页Safety and Environmental Engineering

基　　金：国家自然科学基金项目(50306008);江苏省博士后基金项目(0601044B);总装火炸药青年基金项目(40406010401)资助

摘　　要：为了充分发挥纳米材料的光催化性能,研制了一种带有旋转叶片且可负载光催化纳米材料的光催化反应器,并以制备的纳米TiO2/硅藻土复合材料作为光催化剂、TNT生产废水为处理对象,考察了催化材料附载量、废水浓度和多次重复使用对反应器催化降解效率的影响。结果表明:附载有光催化纳米材料的反应器经过6次6h重复使用,对TNT生产废水催化降解效率仍然保持在75%以上,远高于直接分散在废水中纳米材料的处理效率(47.25%),即多次重复使用并保持高降解效率;而且可较好地避免纳米光催化材料的团聚,避免因回收造成的纳米材料光催化效率降低以及回收不完全造成的水体二次污染等现象。To improve the photocatalysis of nanometer materials, a photocatalytic reactor was developed with rotating blade on which nanometer materials can be loaded. Nanometer TiO2/ diatomite composite was prepared as photocatalyst. The effects of loaded amount of photocatalyst and content of TNT wastewater on the degradation efficiency of the photocatalytic reactor were researched on TNT wastewater. Moreover, compared with those dispersed in wastewater directly, the degradation efficiencies of the photocatalysts loaded on the photocatalytic reactor after being reused many times were emphasized. The results showed that the TNT wastewater degradation efficiency of the photocatalytic reactor was maintained up to 75% after 6 times of reuse with 6 hours of degradation, much higher than that of those dispersed in wastewater. The dispersibilities of nanometer photocatalysts were improved, and high degradation efficiencies of photocatalysts were kept after being reused many times. Furthermore, the recycling of nanometer photocatalysts was avoided and so was the decrease of photocatalytic efficiency of nanometer photocatalysts caused by the recycling processes. The pollution on the treated water as a result of incomplete recycling of nanometer photocatalysts could be prevented too.

关 键 词：光催化反应器 纳米材料 TNT生产废水 处理 

分 类 号：X703.1[环境科学与工程—环境工程]