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。
Perovskite-type La1-x Ag MnO3 （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 La1-xAgxMnO3. 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 La1-xAgxMnO3 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.
出处
《实验室研究与探索》
CAS
北大核心
2009年第8期19-21,117,共4页
Research and Exploration In Laboratory
基金
国家自然科学基金资助项目(20671069)
关键词
纳米晶
掺杂
吸附氧
光催化活性
X射线光电子能谱
Nanocrystallites
doping
adsorbed oxygen
photocatalytic activity
X-rays photoelectron spectrum
