掺杂Cu^(2+)对钙钛矿型LaFeO_3光催化分解水制氢性能的影响  

Effect of Doping Cu^(2+) on Photocatalytic Activity of Perovskite Oxides LaFeO_3 for Hydrogen Evolution from Water

作　　者：桑丽霞[1] 李群伟[1] 胥利先[1] 刘宇[1] 马重芳[1] 

机构地区：[1]北京工业大学传热强化与过程节能教育部重点实验室及传热与能源利用北京市重点实验室,北京100022

出　　处：《西安交通大学学报》2008年第5期626-629,共4页Journal of Xi'an Jiaotong University

基　　金：国家重点基础研究发展计划资助项目(2003CB214500)

摘　　要：利用柠檬酸法制备了系列钙钛矿型复合氧化物LaFe1-xCuxO3(x=0~0.07),通过XRD、TEM、UV-VIS DRS、XPS和PLS等表征手段对其晶相结构、形貌、吸光特性和表面性质进行了表征,并结合光催化分解水反应评价了其产氢活性.结果表明:柠檬酸法制得的钙钛矿型LaFeO3为纳米级材料,其在紫外-可见光区具有较宽的吸收带,掺杂Cu2+可增强对可见光的吸收;在紫外光的激发下,系列纳米钙钛矿型LaFe1-xCuxO3(x=0~0.07)具有一定的光催化分解水产氢活性,且掺杂Cu2+可在一定程度上提高产氢量,其掺杂的最佳摩尔分数为0.05.Perovskite oxides LaFe1-xCuxO3 （x = 0-0.07） was prepared by a conventional citrate complex method. The structure, shape, particle size, the photon absorption performance and surface property of the prepared LaFe1-xCuxO3 （x=0-0.07）were investigated by using XRD, TEM, UV-VIS DRS, XPS and PLS techniques. Perovskite oxides LaFeO3 prepared is a kind of nano-sized material. Perovskite oxides LaFeO3 has the good absorption property in UV-visible region, and a series of Cu-doped LaFeO3 have more respondence to the visible light. Under UV light irradiation, H2can be produced by photocatalytic decomposing of water over the prepared LaFe1-xCuxO3（x=0-0.07）. Doping Cu^2＋ can enhance the photocatalytic activity of LaFeO3 to a certain extent, and the optimal doping molar fraction of catalyst is 0. 05.

关 键 词：LaFe1-xCuxO3 光催化 氢 掺杂 

分 类 号：O64[理学—物理化学]