掺杂二氧化钛电极降解气相二甲苯研究  

Degradation of doped titanium dioxide electrode study of gas-xylene

作　　者：于义龙[1] 徐瑞芬[1] 魏刚[1] 解双英[1] 

机构地区：[1]北京化工大学材料科学与工程学院国家重点实验室,北京100029

出　　处：《环境科学与技术》2010年第S1期73-75,83,共4页Environmental Science & Technology

摘　　要：采用溶胶-凝胶法制备二氧化钛薄膜电极,并对薄膜电极进行电化学测试、TEM和把二氧化钛薄膜制备成喷剂的二甲苯降解测试。实验表明二氧化钛电极明显为纳米尺寸,并用纳米孔的存在;二氧化钛电极可以在光照的条件下产生羟基自由基(·OH),并且制备的喷剂不随着二氧化钛含量的增加而增加,含量在2.5%时达到最佳;加入的B型敏化剂后降解二甲苯的效果最佳,四小时后降解效果可以达到95%以上。Titanium dioxide thin film electrodes were prepared by sol-gel method,and thin-film electrodes for electrochemical measurements,TEM and the integration of titanium dioxide thin films into a spray of xylene degradation test. Experimental results show that two apparently nanometer-sized titanium dioxide electrodes,and the presence of nano-holes;titanium dioxide electrodes in the light of the conditions that generate hydroxyl radicals(·OH) ,and the sprays are not prepared with the titania content increases,the content of 2.5% when you achieve the best;to join B-sensitizer after the degradation of p-xylene the best results. After four hours of degradation effect can be achieved more than 95%.

关 键 词：纳米二氧化钛 二甲苯 羟基自由基 敏化剂 光降解 

分 类 号：X830.2[环境科学与工程—环境工程]