为提高纳米钙钛矿型氧化物薄膜的光催化性能，应用改进的Hummer法制备出薄层石墨烯材料，并采用溶胶-凝胶法结合旋转涂膜技术在玻璃上制备出石墨烯基 LaBO3(B=Ni, Mn, Fe)复合薄膜。利用 XRD、FTIR、FESEM和TEM对薄膜样品的结构、晶粒尺寸及微观形貌进行表征，利用显微拉曼光谱仪测量制备出的石墨烯和薄膜样品在激光功率为400 mW时位于100～3000 cm-1之内的拉曼光谱。将该复合薄膜作为光催化剂，研究石墨烯用量、不同B位元素对该复合薄膜光催化活性的影响。结果表明：复合薄膜的光催化活性显著优于纯钙钛矿薄膜的光催化活性；当石墨烯悬浮液的浓度为0.1 g/L，Ni作为B位阳离子时，该复合薄膜的光催化活性最好。
In order to improve the photocatalytic properties of nano perovskite type oxide film, LaBO3 (B=Ni, Mn, Fe)/graphene thin films were prepared by using sol-gel and spin coating method on glass substrate. The thin layer graphene materials were produced by the sol-gel method. The structure, grain size and morphology were characterized by X-ray diffraction (XRD), Fourier transform infrared (FTIR) spectra, field emission scanning electron microscopy (FESEM) and transmission electron microscopy (TEM). The Raman spectra of the samples were carried out by micro-Raman spectrometer in the range of 100-3 000 cm-1 with the laser power of 400 mW. The photo-catalytic activity of thin films was studied when there were different graphene contents and B-sit elements. The results show that, compared with pure perovskite films, LaBO3 (B=Ni, Mn, Fe)/graphene thin films show better photo-catalysis. When the concentration of graphene suspension is 0.1 g/L using Ni as the B-sit cation, it has the greatest photocatalytic activity.
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