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中国有色金属学报

ZHONGGUO YOUSEJINSHU XUEBAO

第24卷    第1期    总第178期    2014年1月

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文章编号:1004-0609(2014)01-0152-08
LaBO3(B=Ni, Mn, Fe)/石墨烯复合薄膜的制备及光催化性能
胡 婕1, 2,王丽娜1,马嘉华1,黄 浩2

(1. 燕山大学 环境与化学工程学院 河北省应用化学重点实验室,秦皇岛 066004;
2. 燕山大学 亚稳材料制备技术与科学国家重点实验室,秦皇岛 066004
)

摘 要: 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100~3 000 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。

 

关键词: 钙钛矿;石墨烯;复合薄膜;光催化

Preparation and photocatalytic performance of LaBO3(B=Ni, Mn, Fe)/graphene composite thin film
HU Jie1, 2, WANG Li-na1, MA Jia-hua1, HUANG Hao2

1. Hebei Key Laboratory of Applied Chemistry, College of Environment and Chemistry,
Yanshan University, Qinhuangdao 066004, China;
2. State Key Laboratory of Metastable Materials Science and Technology, Yanshan University, Qinhuangdao 066004, China

Abstract: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.

 

Key words: perovskite; graphene; composite thin film; photocatalysis

ISSN 1004-0609
CN 43-1238/TG
CODEN: ZYJXFK

ISSN 1003-6326
CN 43-1239/TG
CODEN: TNMCEW

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