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电泳沉积制备LaMnO3/石墨烯薄膜及其光催化性能

DOI: 10.7521/j.issn.0454-5648.2014.03.21

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Abstract:

采用电泳沉积技术在氧化铟锡(indiumtinoxide,ITO)导电玻璃基底上制备出LaMnO3/石墨烯薄膜。通过扫描电子显微镜、透射电子显微镜、X射线衍射、Raman光谱、紫外-可见吸收光谱和荧光光谱等测试手段探讨了电场强度、溶液的浓度、沉积时间等参数对薄膜结构和表面形貌的影响。结果表明,晶粒粒径约为20nm的LaMnO3较均匀地生长在石墨烯片上,且复合膜的厚度受到电场强度、电泳时间和悬浮液浓度的共同作用。光催化性能研究表明,LaMnO3/石墨烯薄膜的光催化活性显著优于纯LaMnO3薄膜,且还原氧化石墨烯的含量为2%时,该薄膜的光催化性能最好,3h内对直接绿的脱色率达到了98.8%。

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