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钙钛矿型A位掺杂复合氧化物La1-xSrxCoO3-δ的光催化活性研究
Studies on Photocatalysis Activity of Perovskite Type Composite oxides Doped in A sites La1-xSrx CoO3-δ
【摘要】 用柠檬酸溶胶-凝胶法制备了钙钛矿型La1-xSrxCoO3-δ复合氧化物,用XRD、XPS、EDS、红外、紫外等技术进行了表征,测定了其对活性艳红等水溶性染料光催化脱色的活性.结果表明:在A位掺Sr2+,由于产生较多氧空位,表面非晶格活性氧量增加,使LaCoO3的光催化活性明显提高,其中La0.9Sr0.1CoO3-δ效果最佳.
【Abstract】 A series of composite oxides La1-xSrxCoO3-δ （x=0,0.02,0.04,0.06,0.08,0.1,0.2,0.3,0.4,0.5） were prepared by citrate sol-gel method.The LaCoO3 and La1-xSrxCoO3-δ was studied with XRD,XPS,EDS,IR,UV.The photodegradation experiments of water-soluble dyes were carried out in the suspension of La1-xSrxCoO3-δ as the photocatalysts.The results show that the doping can notly improve the photocatalysis activity of LaCoO3 and La0.9Sr0.1CoO3-δ were the best one.
【关键词】 溶胶-凝胶法；
钙钛矿结构；
掺杂；
La0.9Sr0.1CoO3-&；
光催化活性；
【Key words】 Sel-gol method； Perovskite structure； Doping； La1-xSrxCoO3-δ； Photocatalysis activity；
【Key words】 Sel-gol method； Perovskite structure； Doping； La1-xSrxCoO3-δ； Photocatalysis activity；
- 【文献出处】 分子催化 ,Journal of Molecular Catalysis , 编辑部邮箱 ,2005年06期
- 【分类号】O643.36
- 【被引频次】29
- 【下载频次】422