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.
出处
《水处理技术》
CAS
CSCD
北大核心
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)
关键词
钒-氮共掺杂TiO2
溶胶凝胶法
光催化降解
苯酚
V-N co-doped TiO2 photocatalytst
sol-gel method
photocatalytie degradation
phenol
