Journal
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
Volume 37, Issue 6, Pages 4880-4888Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.ijhydene.2011.12.045
Keywords
Graphene; Triphenylamine; 1,3-Dipolar cycloaddition; Electron transfer; Photocatalysis; Hydrogen production
Categories
Funding
- National Natural Science Foundation of China [20673075, 50973077, 51073114]
- Natural Science Foundation of Jiangsu Province [BK2010209]
- Priority Academic Program Development of Jiangsu Higher Education Institutions (PAPD)
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A new type of graphene-based nanohybrid was prepared from graphene nanosheets and 4-(diphenylamino)benzaldehyde (TPA-CHO) through 1,3-dipolar cycloaddition. The nanohybrid was modified by platinum nanoparticles via photodeposition. The nanohybrid and its Pt modified nanocomposite were characterized by atomic force microscopy (AFM), scanning electron microscopy (SEM), and transmission electron microscopy (TEM). Ultraviolet-visible absorption (UV-vis), Fourier transform infrared (FTIR), and Raman spectra confirmed that triphenylamine moiety grafted on the graphene surface. The results of fluorescence quenching and photocurrent enhancement of the triphenylamine-functionalized graphene revealed that photoinduced electron transfer from triphenylamine moiety to the graphene sheet. The investigation of using the Pt modified graphene-based nanocomposite as a photocatalyst for H-2 evolution showed that under UV-vis light irradiation, the average H-2 evolution rate and the quantum efficiency is 2.3 mu mol h(-1) and 0.45% mol E-1 respectively. This work demonstrated a potential application of an organic sensitizer covalently functionalized graphene as a novel photocatalyst in the field of solar energy conversion. Copyright (C) 2011, Hydrogen Energy Publications, LLC. Published by Elsevier Ltd. All rights reserved.
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