摘要
利用二氧化钛溶胶进行光催化含氯的有机物。二氯甲烷溶液在二氧化钛溶胶和紫外光的作用下 ,分解并使得溶液的电导率增加。二氧化钛溶胶的浓度和二氯甲烷的浓度对光催化的电导率的变化有一定的联系。当二氧化钛的浓度过高时 ,光照所产生的自由基和氧空穴对由于复合、浓度减低 ,导致二氯甲烷的降解反应速度变缓 ,反映在电导率的变化上 ,电导率的增加速度变缓。选择合适的二氧化钛的浓度 ,将有利于二氯甲烷的光催化分解。
Titanium oxide sol was prepared using inorganic titanium salt, and was used to photo-oxidize dichloromethane(DCM) solution. Conductivity of solution was increased when DCM degraded under UV radiating. Addition of titanium oxide sol makes the degradation rate of DCM greater, and the conductivity will be changed. As the addition of sol, the change rate of conductivity increased. But when the added amount of sol to solution is too much, the change rate of conductivity will be reduced for the reduced photo-oxidation of DCM. Suitable addition amount of sol is benefit to photo-catalysis of DCM in solution.
出处
《材料科学与工程学报》
CAS
CSCD
北大核心
2004年第4期523-526,共4页
Journal of Materials Science and Engineering
基金
探圳市科技计划资助项目(2 0 0 0 1 8)
