TiO2-graphene nanocomposites. UV-assisted photocatalytic reduction of graphene oxide.
By Graeme P. Williams, B. Seger, Prashant Kamat. ACS Nano, 2008
2,368 citations recorded by the source corpus.
Graphene oxide suspended in ethanol undergoes reduction as it accepts electrons from UV-irradiated TiO(2) suspensions. The reduction is accompanied by changes in the absorption of the graphene oxide, as the color of the suspension shifts from brown to black. The direct interaction between TiO(2) particles and graphene sheets hinders the collapse of exfoliated sheets of graphene. Solid films cast on a borosilicate glass gap separated by gold-sputtered terminations show an order of magnitude decrease in lateral resistance following reduction with the TiO(2) photocatalyst. The photocatalytic methodology not only provides an on-demand UV-assisted reduction technique but also opens up new ways to obtain photoactive graphene-semiconductor composites.
Subfields: Biomedical Engineering, Materials Chemistry, Renewable Energy, Sustainability and the Environment
View Paper: https://www.semanticscholar.org/paper/47165c24ee11bc71a1e4c4f04c1171af8e621eb9
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Citations in the corpus
- One-step, solvothermal synthesis of graphene-CdS and graphene-ZnS quantum dot nanocomposites and their interesting photovoltaic properties (2010, background): “It is now known that semiconductor nanoparticles interact with GO through its carboxylic acid functional groups [18].”
- Restoration of graphene from graphene oxide by defect repair (2012, background): “been developed, including thermal annealing [8,11–16], chemical [17–21], photocatalytic [22,23] and plasma reduction [7,24], and it turns out to be efficient.”
- UV light exposure of aqueous graphene oxide suspensions to promote their direct reduction, formation of graphene–metal nanoparticle hybrids and dye degradation (2012, background): “[21] Williams G, Seger B, Kamat PV.”