Innovative preparation of MoS sub(2)-graphene heterostructures based on alginate containing (NH sub(4)) sub(2)MoS sub(4 ) and their photocatalytic activity for H sub(2) generation

Films and particles of MoS sub(2) on graphene (G) showing synergy for photocatalytic H sub(2) evolution due to the strong interaction between the two layered components have been obtained by pyrolysis at 900 [degrees]C under argon flow of ammonium alginate, films or powders, containing variable prop...

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Bibliographic Details
Published in:Carbon (New York) 2015-01, Vol.81, p.587-596
Main Authors: Latorre-Sanchez, Marcos, Esteve-Adell, Ivan, Primo, Ana, Garcia, Hermenegildo
Format: Article
Language:English
Subjects:
Alginates
Carbon
Evolution
Graphene
Heterostructures
Molybdenum disulfide
Noble metals
Photocatalysis
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Summary:Films and particles of MoS sub(2) on graphene (G) showing synergy for photocatalytic H sub(2) evolution due to the strong interaction between the two layered components have been obtained by pyrolysis at 900 [degrees]C under argon flow of ammonium alginate, films or powders, containing variable proportions of (NH sub(4)) sub(2)MoS sub(4 ). X-ray diffraction shows that under these conditions (NH sub(4)) sub(2)MoS sub(4 ) decomposes to MoS sub(2), while simultaneously alginate forms few layers G or graphitic carbon residues. Sonication of MoS sub(2)-G powders in water produces exfoliation of the material leading to few-layers platelets of MoS sub(2)-G heterostructures. MoS sub(2) is considered as an alternative of noble metals for H sub(2) evolution in dye-sensitized photocatalytic systems. In the present case, MoS sub(2)-G heterostructures exhibit more than double photocatalytic activity for H sub(2) generation than pristine MoS sub(2) particles.
ISSN:0008-6223
DOI:10.1016/j.carbon.2014.09.093