中文摘要：

采用柠檬酸络合法合成了系列纳米钙钛矿型La1-xAgxMnO3（x=0，0．05，0．1，0．2，0．3，0．4）复合氧化物，利用TG-DTA和XRD技术对该系列氧化物进行了结构表征，发现所制样品具有钙钛矿构型。并以其为光催化剂在荧光汞灯照射下水溶性染料进行降解实验，结果表明Ag^＋掺杂使LaMnO3的催化活性得到了很大的提高，并且在掺杂量为5％时催化剂的活性达到最高。XPS结果表明系列La1-xAgxMnO3的光催化活性与表面吸附氧的含量有关。

英文摘要：

Perovskite oxides La1-xAgxMnO3 were prepared by citric acid complex method and analyzed by TG-DTA and XRD. It shown that the construction of prepared samples is perovskite-type. Using a luminous Hg lamp as irradiator, the degradation experiments of various water-soluble dyes were carried out in the suspension system of La1-xAgxMnO3. The results show that the photo-catalytic activity of La1-xAgxMnO3 is improved notably because of doping of Ag and La0.95Ag0.05MnO3 is the best one. The result of XPS shows photo-catalytic activity of La1-xAgxMnO3 is relative with the chemical adsorbed oxygen on surface.