钒-氮共掺杂TiO_2光催化降解苯酚试验研究  

EXPERIMENTAL RESEARCH ON PHOTOCATALYTIC DEGRADATION OF PHENOL BY V-N CODOPED TiO_2

作　　者：安兴才[1] 陈作雁[1] 韩立娟[1] 刘刚[1] 喜文华[1] 

机构地区：[1]甘肃省科学院自然能源研究所,甘肃兰州730046

出　　处：《水处理技术》2012年第9期17-20,25,共5页Technology of Water Treatment

基　　金：甘肃省科技支撑项目(1011GKCA043)

摘　　要：采用溶胶-凝胶法制备了钒-氮共掺杂TiO2光催化剂,对苯酚溶液进行了光催化降解试验研究,考察了在模拟太阳光条件下,pH、曝气量、苯酚溶液初始和催化剂投加量对钒-氮共掺杂TiO2光催化剂降解苯酚溶液的影响。结果表明,在试验条件下,以800 W氙灯为光源,反应溶液pH=6,曝气体积流量75 mL/min,苯酚溶液初始质量浓度小于80mg/L,催化剂投加量1.5 g/L时,苯酚溶液降解率最高;钒-氮共掺杂TiO2光催化剂重复使用7次后,对苯酚的光催化活性没有明显下降,具有良好的重复使用性。可为钒-氮共掺杂TiO2的应用推广提供依据。V-N co-doped TiO2 photocatalytst was prepared by sol-gel method, photocatalytie degradation of phenol was studied. Under simulated sunlight conditions, the effect of pH value and aeration and initial concentration of phenol and catalyst dosage on V-N co-doped TiO2 photocatalyst degradation of phenol were investigated. The results showed that when the light source was 800W xenon lamp, pH was 6, aeration volume flow was 75 mL/min, initial concentration of phenol was less than 80 mg/L, catalyst dosage was 1.5 g/L, The degradation rate of phenol was highest in this experimental conditions. The photocatalytic activity to phenol was not significantly decreased after V-N co-doped TiO2 photocatalytst reused for seven times, which had good reusability. It provided the basis for the application and popularization of V-N co-doped TiO2 photocatalytst.

关 键 词：钒-氮共掺杂TiO2 溶胶凝胶法 光催化降解 苯酚 

分 类 号：TQ031.7[化学工程]