Journal
NANO LETTERS
Volume 10, Issue 2, Pages 577-583Publisher
AMER CHEMICAL SOC
DOI: 10.1021/nl9035109
Keywords
Graphene composite; catalysts; photocatalysis; metal nanoparticles; carbon support; electron storage
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Funding
- Department of Energy, Office of Basic Energy Sciences
- Notre Dame Radiation Laboratory [4829]
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Using reduced graphene oxide (RGO) as a two-dimensional support, we have succeeded in selective anchoring of semiconductor and metal nanoparticles at separate sites. Photogenerated electrons from UV-irradiated TiO2 are transported across RGO to reduce silver ions into silver nanoparticles at a location distinct from the TiO2 anchored site. The ability of RGO to store and shuttle electrons, as visualized via a stepwise electron transfer process, demonstrates its capability to serve as a catalyst nanomat and transfer electrons on demand to adsorbed species. These findings pave the way for the development of next generation catalyst systems and can spur advancements in graphene-based composites for chemical and biological sensors.
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