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LaNiO_3/石墨烯复合薄膜的制备及光催化性能

Preparation and Photocatalytic Performance of the LaNiO_3/Graphene Composite Film
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摘要 采用改进的Hummer法制备出薄层石墨烯材料,采用溶胶-凝胶法结合旋转涂膜技术以玻璃基底制备出石墨烯基LaNiO3复合薄膜。采用X射线衍射(XRD)仪,透射电镜(TEM),扫描电镜(SEM),拉曼光谱,X射线衍射光电子能谱(XPS)、紫外-可见(UV-Vis)吸收光谱和荧光光谱(PL)等测试手段对复合薄膜进行表征。结果表明,晶粒粒径约为20 nm的LaNiO3较均匀地生长在了石墨烯片上。光催化性能研究表明,LaNiO3/石墨烯复合薄膜的光催化活性显著优于LaNiO3薄膜,当石墨烯的含量约为4%时,复合薄膜4 h内对酸性红的降解效率比LaNiO3薄膜提高了1倍。 Thin layer graphene materials were produced by the improved Hummer method. The graphene-based LaNiO3 composite films were prepared by a sol-gel method combined with a spin coating technique on glass substrate. The composite films were characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM), transmission electron microscopy (TEM), Raman spectroscopy, X-ray photoelectron spectroscopy (XPS), UV-Vis absorbance spectroscopy, and photoluminescence (PL) spectroscopy. The result shows that the LaNiO3 crystalline grains of about 20 nm particle size uniformly grow on the graphene sheet. The photocatalytic activity of the film sample was tested by Acid red A degradation. Comparing with LaNiO3 films, the LaNiO3/graphene composite films show better photo-catalysis. When the content of graphene is about 4%, the photo-catalytic efficiency of the LaNiOJgraphene composite films is double that of the LaNiO3 films.
出处 《稀有金属材料与工程》 SCIE EI CAS CSCD 北大核心 2014年第7期1736-1741,共6页 Rare Metal Materials and Engineering
基金 河北省自然科学基金资助项目(E2011203031) 河北省高等学校自然科学研究指导项目(Z2011146) 秦皇岛市科技支撑计划(201101A127)
关键词 钙钛矿 石墨烯 复合薄膜 光催化 perovskite graphene composite film photocatalysis
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