Exfoliation of graphite into graphene in aqueous solution: an application as graphene/TiO2 nanocomposite to improve visible light photocatalytic activity

被引:25
作者
Giovannetti, R. [1 ]
Rommozzi, E. [1 ]
Zannotti, M. [1 ]
D'Amato, C. A. [1 ]
Ferraro, S. [1 ]
Cespi, M. [2 ]
Bonacucina, G. [2 ]
Minicucci, M. [3 ]
Di Cicco, A. [3 ]
机构
[1] Univ Camerino, Div Chem, Sch Sci & Technol, Via S Agostino 1, I-62032 Camerino, Italy
[2] Univ Camerino, Sch Pharm, Via S Agostino 1, I-62032 Camerino, Italy
[3] Univ Camerino, Div Phys, Sch Sci & Technol, Via Madonna Carceri 9, I-62032 Camerino, Italy
关键词
DEGRADATION; PERFORMANCE; NANOPARTICLES; COMPOSITES; DYES;
D O I
10.1039/c6ra07617c
中图分类号
O6 [化学];
学科分类号
0703 ;
摘要
The aim of this study was the preparation of a graphene/TiO2 heterogeneous catalyst supported on polypropylene for visible light photocatalysis. Aqueous graphene dispersions were prepared by liquid-phase exfoliation of graphite in the presence of a non-ionic surfactant, Triton X-100. The obtained graphene dispersion was characterized by X-ray diffraction, dynamic light scattering and UV-Visible spectroscopy and was subsequently used for the preparation of graphene/TiO2 photocatalyst. As-prepared photocatalysts were tested for the photocatalytic degradation of a refractory dye, Alizarin Red S, in water solutions as target pollutant. Graphene/TiO2 nanocomposites showed higher adsorption of Alizarin Red S on the catalyst surface and higher photocatalytic activity for its degradation under visible light irradiation, in respect to those obtained with pure TiO2.
引用
收藏
页码:93048 / 93055
页数:8
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