摘要
以苯酚为模拟污染物,考察了不同晶型、溶液初始pH值、反应物初始浓度、氧气的协同作用对TiO2悬浮体系光催化活性的影响;并将TiO2负载到活性炭纤维上,制备了固定体系的TiO2/ACF复合催化剂。结果表明,具有混晶结构的P25降解速率比纯锐钛矿TiO2快;溶液pH=6及苯酚初始浓度为150mg/L时,降解速度最快;通入氧气,可以提高催化剂活性;光催化降解苯酚表明,TiO2/ACF复合催化剂具有较好的光催化活性。
The influences of different crystal structure, pH value, phenol initial concentration, oxygen synergetie effect on the photoeatalytie activity of TiO2 in suspension system were investigated. Meanwhile, TiO2/ACFs composite catalysts were successfully prepared. The results showed that mixed crystal structure TiO2 had higher degradation velocity than pure anatase phase TiO2; when the pH value of phenol solution equaled to 6, it had the highest degradation velocity and if the phenol initial concentration was 150 mg/L, it also had the quickest velocity, bubbling oxygen can greatly improve photoeatalytie activity. The photodegradation of phenol aqueous solution indicated that TiO2/ACFs were proved having good photoeatalytie activity.
出处
《稀有金属快报》
CSCD
2007年第4期22-26,共5页
Rare Metals Letters
关键词
二氧化钛
光催化
苯酚
复合催化剂
titanium dioxide
photoeatalysis
phenol
composite catalysts