Bi-N-F-TiO_2光催化剂降解对氯苯酚的动力学研究  

Kinetics of Bi-N-F-TiO_2 Induced Photocatalytic Degradation of 4-Chlorophenol

作　　者：李巍巍[1] 周淑颖[1] 纪晓婷 

机构地区：[1]杭州职业技术学院临江学院,浙江杭州310018

出　　处：《广州化工》2017年第18期32-33,94,共3页GuangZhou Chemical Industry

基　　金：浙江省大学生科技创新活动计划暨新苗人才计划(2015R452009);省级课堂教学改革项目(kg20160714);杭州市属高校产学对接优秀中青年教师进企服务项目

摘　　要：以硝酸铋和氟化铵为掺杂剂,凝胶-水热法制备了具有可见光响应的铋、氮和氟共掺杂TiO_2催化剂。研究了底物初始浓度、催化剂用量和溶液的酸度对光催化速率的影响,考查了铋、氮和氟共掺杂二氧化钛催化对氯苯酚动力学行为。结果表明催化反应符合兰格缪尔-修斯伍德动力方程。在模拟可见光照射下,对氯苯酚底液浓度为50 mg/L、催化剂用量为1.5 g/L,溶液p H为3、室温下光照反应2 h,对氯苯酚的降解率为100%。Nano Bi-N-F-TiO2 photo catalysts were prepared by a sol-hydrothermal method with tetrabutyl titanateas precursor, ammonium fluoride with bismuth nitrate as dopants. Kinetics of nano TiO2 were studied by analyzing theinfluence of initial 4-chlorophenol concentration, catalyst amount and pH value on photochemical catalysis speed. Thedegrading speed showed first-order kinetics under experimental conditions： initial 4- chlorophenol concentration with50 rag/L, a catalyst dosage of 1.5 g/L, pH value of 3, and an illumination time with 2 h at room temperature. Thephotocatalytic process of 4-chlorophenol conformed to the rule of Langmuir-Hinshelwood kinetics, which followed the first-order reaction.

关 键 词：Bi-N-F-TiO2 共掺杂 对氯苯酚 动力学 

分 类 号：O643.3[理学—物理化学]