Sm-N-P-TiO2纳米光催化剂在模拟太阳光下光催化降解4-氯酚的动力学

应用化学, 2014, 31(3): 310-315. doi: 10.3724/SP.J.1095.2014.30201

Sm-N-P-TiO2纳米光催化剂在模拟太阳光下光催化降解4-氯酚的动力学

王庆元 ^1, , 姜洪泉 ^2, , 李井申 ^3, , 王巧凤 ^4, , 李振宇 ^5,

1.哈尔滨师范大学功能材料设计合成与绿色催化黑龙江省高校重点实验室哈尔滨150025

2.哈尔滨师范大学功能材料设计合成与绿色催化黑龙江省高校重点实验室哈尔滨150025

3.哈尔滨师范大学功能材料设计合成与绿色催化黑龙江省高校重点实验室哈尔滨150025

4.哈尔滨师范大学功能材料设计合成与绿色催化黑龙江省高校重点实验室哈尔滨150025

5.哈尔滨师范大学功能材料设计合成与绿色催化黑龙江省高校重点实验室哈尔滨150025

基金项目: the Science and Technology Research Program of Education Bureau of Heilongjiang Province(12531213) 黑龙江省高校科技创新团队建设计划(2011TD010) Surpported by the Program for Scientific and Technological Innovation Team Construction in Universities of Heilongjiang Province(2011TD010) 黑龙江省教育厅科学技术研究资助项目(12531213)

关键词： TiO2 , Sm-N-P共掺杂 , 氯酚 , 光催化 , 动力学

Kinetics of Nano-Sm-N-P-TiO2 Induced Photocatalytic Degradation of 4-Chlorophenol Under Simulated Sunlight Irradiation

Keywords： TiO2 , Sm-N-P tridoping , chlorophenol , photocatalysis , kinetics

采用改进的溶胶-水热技术,制备了新型高性能Sm-N-P-TiO2纳米光催化剂.考察了条件因素对4-氯酚(4-CP)溶液在模拟太阳光下光催化降解的影响规律,并对不同催化剂的光活性进行了对比研究.结果表明,在实验条件下,4-CP光催化降解行为符合准一级动力学规律；随着4-CP溶液浓度增大,一级反应速率常数不断降低.在4-CP溶液初始浓度40 mg/L、催化剂用量1.5 g/L、溶液pH =5.2、溶液温度36℃、500 W氙灯照射2h条件下,4-CP完全分解,表观速率常数Kapp为5.32×10-2 min-1,Sm-N-P-TiO2的光催化活性是混晶型纳米TiO2(P25)的3.49倍；TOC去除率达到96.8％.

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