【摘要】 采用柠檬酸法合成了系列纳米钙钛矿型La1-xAgxMnO3(x=0,0.05,0.1,0.2,0.3,0.4,0.5)稀土复合氧化物,并以其为光催化剂,对不同水溶性染料进行光催化降解实验。利用TG-DTA和XRD技术对该系列氧化物进行了结构表征,采用XPS技术测其表面吸附氧的含量。结果表明,La1-xAgxMnO3表面吸附氧的含量随掺杂比的不同而有规律的改变,进而影响其光催化活性;吸附氧的含量越高,对应的催化剂活性越强。更多还原

【Abstract】 Perovskite-type La_1-xAg_xMnO₃（x=0,0.05,0.1,0.2,0.3,0.4,0.5）were prepared by citrate method.Using afluoreceent Hg lamp as irradiator,the degradation experiments of various water-soluble dyes were carried out in the suspension system of La_1-xAg_xMnO₃.The productions were characterized by means of TG-DTA and XRD.And also using XPS to measure their surface adsorbed oxygen.The result shows that the surface adsorbed oxygen of perovskite composite La_1-xAg_xMnO₃ changes regularly by different rate of doping.Then it will affect the photocatalytic activity.It is concluded that the more surface adsorbed oxygen the higher photocatalytic activity is.更多还原