光催化剂Bi3．84W0．16O6.24在模拟太阳光下对双酚A的降解  

Photocatalytic degradation of bisphenol A by a new photocatalyst Bi_(3.84)W_(0.16)O_(6.24) under simulated solar light irradiation

作　　者：王春英[1,2] 单国强[1] 陈鹏[1] 宋超[1] 祝凌燕[1] 

机构地区：[1]南开大学环境科学与工程学院,环境污染过程与基准教育部重点实验室,天津市城市生态环境修复与污染防治重点实验室,天津300071 [2]江西理工大学资源与环境工程学院,江西赣州341000

出　　处：《中国环境科学》2011年第12期1977-1982,共6页China Environmental Science

基　　金：教育部重大培育项目(708020);国家科技部重大专项(2008ZX07526-003,2009DFA91910)

摘　　要：采用水热合成法在pH12的条件下合成圆片状Bi3.84W0.16O6.24催化剂.通过XRD、FESEM、TEM、UV-vis漫反射等表征分析Bi3.84W0.16O6.24的物相、形貌和吸光性能.以双酚A(BPA)为目标污染物,研究了Bi3.84W0.16O6.24在模拟太阳光辐射下的光催化反应活性.设计L18(37)正交试验研究了BPA初始浓度、催化剂投入量、反应溶液pH值以及光催化反应时间对Bi3.84W0.16O6.24光催化降解BPA的影响.正交试验的极差和方差分析结果表明,BPA初始浓度和反应时间影响非常显著,催化剂用量影响显著,反应溶液pH值影响不显著,初始浓度和催化剂量的交互作用很小.在BPA初始浓度为20mg/L、催化剂量2g/L、反应溶液pH7、反应时间为90min的条件下Bi3.84W0.16O6.24对BPA去除率达99.5%,TOC去除率为86.0%,BPA的降解符合一级反应动力学.A new photocatalyst Bi3.84W0.16O6.24 with disk morphology was synthesized by hydrothermal method at pH 12. The catalyst phase, morphology and light absorption property were characterized by XRD, FESEM, TEM, UV-vis DRS. Bisphenol A （BPA） was used as a target compound to investigate the photocatalytic activity of Bi3.84W0.16O6.24 under simulated solar light irradiation. An orthogonal test L18（37） was design to study the impacts of BPA initial concentration, catalyst amount, pH of reaction solution, reaction time and the interaction of BPA initial concentration and catalyst amount on the degradation efficiency. Range analysis and variance analysis indicate that BPA initial concentration, reaction time and catalyst amount affected the degradation efficiency significantly, while pH of reaction solution and the interaction of BPA initial concentration and catalyst amount displayed slight impacts. 99.5% of BPA and 86.0% of TOC were removed from the reaction solution with BPA initial concentration at 20 mg/L, catalyst amount 2 g/L, pH 7 and 90 min irradiation. The reaction of Bi3.84W0.16O6.24 photodegradation on BPA followed a first-order reaction kinetic.

关 键 词：Bi3.84W0.16O6.24 模拟太阳光 双酚A 正交试验 TOC 

分 类 号：X703.5[环境科学与工程—环境工程]