Journal
MATERIALS LETTERS
Volume 108, Issue -, Pages 336-339Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/j.matlet.2013.06.102
Keywords
Semiconductor; Carbon nanotubes; Photocatalysis; Graphene; CdS
Funding
- national key basic research development program (973 project) of China [2010CB429006]
- National Science Fund for Distinguished Young Scholars [51225901]
- National Natural Science Foundation of China [51108158]
- Major Science and Technology Program for Water Pollution Control and Treatment [2012ZX07101-008]
- outstanding youth fund of Jiangsu Province [BK2012037]
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CdS-deposited graphene-CNTs hybrid photocatalysts were synthesized by a simple one-step hydrothermal method. The obtained materials were characterized by X-ray diffraction, scanning electron microscopy, UV-vis diffuse reflectance spectroscopy. The photocatalytic activity was investigated by the degradation of methylene blue (MB) under visible light irradiation. An enhanced photoactivity was observed for graphene-CNTs-CdS composites compared to graphene-CdS. The improvement was ascribed to the introduction of CNTs, which could reduce the aggregation of graphene and accelerate the electron transmission rate (reducing the recombination of photo-generated holes and electrons). The results also showed that the optimal mass ratio of CNTs: CdS was 2%. The mechanism of the enhancement in photocatalytic activity was also investigated. (C) 2013 Elsevier B.V. All rights reserved.
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