High quality graphene oxide–CdS–Pt nanocomposites for efficient photocatalytic hydrogen evolution
Graphene oxide–CdS–Pt (GO–CdS–Pt) nanocomposites with different amounts of Pt nanoparticles were successfully synthesized via the formic acid reduction process followed by a two-phase mixing...
| Main Authors: | , , , , |
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| Other Authors: | |
| Format: | Journal Article |
| Language: | English |
| Published: |
2012
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| Subjects: | |
| Online Access: | https://hdl.handle.net/10356/100812 http://hdl.handle.net/10220/7455 |
| Summary: | Graphene oxide–CdS–Pt (GO–CdS–Pt) nanocomposites with different amounts of Pt nanoparticles
were successfully synthesized via the formic acid reduction process followed by a two-phase mixing
method. The morphology, crystal phase and optical properties of obtained composites were well
characterized by atomic force microscopy (AFM), transmission electron microscopy (TEM), X-ray
diffraction (XRD), UV-vis spectroscopy, Fourier transform IR spectroscopy (FT-IR) and X-ray
photoelectron spectroscopy (XPS), respectively. The photocatalytic activity of GO–CdS–Pt composites
for hydrogen generation was investigated. The results show that the GO–CdS–Pt composite containing
0.5 at% of Pt exhibits the highest hydrogen evolution rate of 123 mL h 1 g 1 with strong photostability,
which is about 2.5 times higher than that of GO–CdS and 10.3 times higher than that of CdS. The
increased photocatalytic hydrogen generation efficiency is attributed to the effective charge separation
and decreased anti-recombination with the addition of GO and Pt, as well as the low overpotential of Pt
for water splitting. Our findings pave a way to design multi-component graphene-based composites for
highly efficient H2 generation and other applications. |
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