Flexible graphene composites for removal of methylene blue dye-contaminant from water

被引：34
作者：
Oliva, J. [1 ]
Martinez, A. I. [2 ]
Oliva, A. I. [3 ]
Garcia, C. R. [4 ]
Martinez-Luevanos, A. [1 ]
Garcia-Lobato, M. [1 ]
Ochoa-Valiente, R. [4 ]
Berlanga, A. [1 ]
机构：
[1] Univ Autonoma Coahuila, CONACYT, Fac Ciencias Quim, Saltillo 25280, Coahuila, Mexico
[2] CINVESTAV, Unidad Saltillo, Parque Ind, Ramos Arizpe 25900, Coahuila, Mexico
[3] CINVESTAV, Unidad Merida, Dept Fis Aplicada, Merida 97310, Yucatan, Mexico
[4] Univ Autonoma Coahuila, Fac Ciencias Fis Matemat, Saltillo 25000, Coahuila, Mexico
来源：
APPLIED SURFACE SCIENCE | 2018年 / 436卷
关键词：
Graphene nanoplatelets; Acrylic monomer; Flexible composite; Photocatalysis; Methylene blue; PHOTOCATALYTIC ACTIVITY; COMBUSTION;
D O I：
10.1016/j.apsusc.2017.12.084
中图分类号：
O64 [物理化学（理论化学）、化学物理学];
学科分类号：
070304 ; 081704 ;
摘要：
This work presents the use of flexible graphene composites (FGCs) fabricated by a casting method for the removal of Methylene blue (MB) dye from water. Those FGCs with elastic modulus of 15 MPa had enough mechanical resistance to support the Al2O3:Eu3+ and SrAl2O4:Bi3+ photocatalytic powders. After the incorporation of those powders in the FGCs, their photocatalytic activity was evaluated by monitoring the degradation of MB dye under solar irradiation. Scanning electron microscopy (SEM) images demonstrate that the surface of FGCs with catalysts powders presents pores with sizes in the range of 15-40 mu m, which favored the sunlight absorption by scattering effects. Moreover, X-Ray diffraction measurements confirmed the formation of the composites by displacements of their diffraction peaks. The MB dye was completely removed (by photocatalysis and by physical adsorption) from the water after 180 min and 270 min by using the FGCs with Al2O3:Eu3+ and SrAl2O4:Bi3+ catalysts respectively. Hence, the results of photocatalytic activity suggest that our FGCs could be used as an effective support of catalyst powders for the easy removal of dye contaminants in wastewater treatment plants. (C) 2017 Elsevier B.V. All rights reserved.
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页码：739 / 746
页数：8
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