钙钛矿(ABO_3)型复合氧化物的光催化活性变化趋势与分析  

Change Tendency of Photocatalytic Activity in System of Perovskite(ABO_3) Type Oxide and Analysis

作　　者：白树林[1] 傅希贤[1] 桑丽霞[1] 杨秋华[1] 王俊珍[1] 曾淑兰[1] 

机构地区：[1]天津大学理学院化学系,天津300072

出　　处：《高等学校化学学报》2001年第4期663-665,共3页Chemical Journal of Chinese Universities

基　　金：国家自然科学基金! (批准号 :5 9770 19)资助

摘　　要：The perovskite(ABO 3) type oxides have a photocatalytic activity that can be characterized with decolorization of some organic dyes under irradiation of mercury lamp. The experimental results show that the photocatalytic activity of ABO 3 increases with increasing atomic number of atom B(Ti—Co) when A site atom keeps constant. It is connected with the rise of Allred Rochow electronegativity of atom B, the decrease of ABO 3 energy gap(energy defference between the filled p bands of O 2- and the unoccupied 3 d band of neighboring atom B) and the increase of the third atomic ionizaton potentials of atom B. It has been also proved that the photocatalytic activity of ABO 3 compounds increases with increasing χ AR of atom A(Ca, Cd, Pb).The perovskite(ABO 3) type oxides have a photocatalytic activity that can be characterized with decolorization of some organic dyes under irradiation of mercury lamp. The experimental results show that the photocatalytic activity of ABO 3 increases with increasing atomic number of atom B(Ti—Co) when A site atom keeps constant. It is connected with the rise of Allred Rochow electronegativity of atom B, the decrease of ABO 3 energy gap(energy defference between the filled p bands of O 2- and the unoccupied 3 d band of neighboring atom B) and the increase of the third atomic ionizaton potentials of atom B. It has been also proved that the photocatalytic activity of ABO 3 compounds increases with increasing χ AR of atom A(Ca, Cd, Pb).

关 键 词：钙钛矿型复合氧化物 光催化活性 Allred-Rochow电负性 能隙 有机染料 脱色率 

分 类 号：O643.361[理学—物理化学]