氯仿在悬浮TiO_2体系中的降解  

Photodegradation of CHCl_3 in TiO_2 slurry

作　　者：陈国钧[1] 郑仲[1] 冯新[1] 史月萍[1] 杨祝红[1] 周雪锋[1] 陆小华[1] 

机构地区：[1]南京工业大学化学化工学院,江苏南京210009

出　　处：《南京工业大学学报（自然科学版）》2004年第4期5-9,共5页Journal of Nanjing Tech University(Natural Science Edition)

基　　金：江苏省科委应用基础研究基金(BJ98060);江苏省自然科学基金(BS2000013);国家自然科学基金(20246002);国家自然科学基金(20236010)资助

摘　　要：分别用光还原沉积法制备的掺铂TiO2纤维和商用TiO2作为催化剂,对氯仿进行光催化降解。通过测定Cl-浓度发现不同通O2方式对氯仿的光降解有很大影响,O2的存在,促进了氯仿的降解;并进一步对溶液中的溶氧量(DO)测定,发现DO值呈线性下降且氯仿降解过程中有氧降解和无氧降解2种机理是共存的;同时发现上述2种催化剂的反应现象大相径庭,并结合了有机质液相吸附理论对其反应现象进行分析,发现纤维状微观结构是其高光催化性能的直接原因。The titania fiber doped Pt in the method of light reduction and the commercial titania were used as catalyst to do some chloroform degradation experiments.The concentrate of chloridion was detected on line in the process and DO was measured in the different reaction moment. It was found that the different methods of aerating had influeace on degradation.It was also found that oxygen played a different role and was consumed in the process of photodegradation of chloroform. This phenomenon conforms to the mechanism of chloroform degradation. At the same time, the reaction process of titania fiber doped Pt and commercial titania particles were completely different. The phenomena was analyzed using organic adsorption theory in liquid phase. The microcosmic structure of titania fiber is the reason which lead to high photocatalysis activity.

关 键 词：氯仿 悬浮二氧化钛体系 光催化 溶氧量 降解 光还原沉积法 水处理 

分 类 号：TU991.2[建筑科学—市政工程]