宽带隙p区金属氧化物/氢氧化物对苯的光催化降解(英文)

Wide Bandgap p-Block Metal Oxides/Hydroxides for Photocatalytic Benzene Degradation

苯具有高毒性和致病性,是空气中常见的一种挥发性有机污染物,对健康和环境危害大.以TiO2为代表的半导体光催化氧化技术是一种理想的环境治理技术,已广泛应用于一般室内挥发性有机物(VOCs)的去除.然而在处理苯等难降解有机污染物时,由于在催化剂表面生成难被降解的聚合物中间产物,往往导致TiO2光催化剂的失活.开发可在常温下使用的降解苯系污染物的高效光催化剂对于推广光催化技术在苯污染治理中的应用具有重大的意义.最近我们研究所开发出一系列宽带隙p区金属氧化物/氢氧化物光催化剂,它们对苯系污染物的光催化降解显示出很好的活性和稳定性,是一类极具应用前景的降解苯系污染物的新型光催化剂.在这篇文章中,我们总结这类宽带隙p区金属氧化物/氢氧化物光催化剂的制备及其光催化降解苯的活性,对其不同于TiO2的光催化机理,及其结构和光催化性能之间的关系进行初步的探讨.

Benzene has severe health and environmental consequences because of its high toxicity and carcinogenicity.Although TiO2-based photocatalytic oxidation （PCO） has been established as one of the most promising technologies for environmental remediation and has been successful in treating a wide variety of volatile organic compounds （VOCs）,PCO has only limited success in the treatment of aromatic compounds like benzene because of the deactivation of TiO2.The development of high performance photocatalysts for benzene degradation is indispensable for benzene treatment.Recently a series of wide bandgap p-block metal oxides/hydroxides with superior performance for the photocatalytic degradation of benzene have been developed in our institute.These wide bandgap p-block metal oxides/hydroxides are a series of promising photocatalysts for benzene degradation.In this article,the preparations of these p-block metal oxides/hydroxides,their photocatalytic activity and mechanism for benzene degradation as well as the structure-activity relationship are summarized.