Graphene Nanomesh by ZnO Nanorod Photocatalysts
- 15 June 2010
- journal article
- research article
- Published by American Chemical Society (ACS) in ACS Nano
- Vol. 4 (7), 4174-4180
- https://doi.org/10.1021/nn1007429
Abstract
Local photodegradation of graphene oxide sheets at the tip of ZnO nanorods was used to achieve semiconducting graphene nanomeshes. The chemically exfoliated graphene oxide sheets, with a thickness of ∼0.9 nm, were deposited on quartz substrates. Vertically aligned ZnO nanorod arrays with diameters of 140 nm and lengths of <1 μm were grown on a glass substrate by using a hydrothermal method. The graphene oxide sheets were physically attached to the tip of the ZnO nanorods by assembling the sheets on the nanorods. UV-assisted photodegradation of the graphene oxide sheets (with dimension of ∼5 × 5 μm) at a contact place with the ZnO nanorods resulted in graphene nanomeshes with a pore size of ∼200 nm. The graphene nanomeshes prepared by using the photocatalytic property of the ZnO nanorods contained smaller oxygen-containing carbonaceous bonds and higher defects as compared to the as-prepared graphene oxide sheets. When chemical reduction of the graphene nanomeshes by hydrazine was used, the oxygen bonds of the nanomeshes more decreased while their graphitization increased. Based on X-ray photoelectron spectroscopy at low binding energies, the graphene nanomeshes reduced by hydrazine exhibited as a broad sheet a p-type semiconductor with an ∼1.2 eV energy gap between the valence band and the Fermi level.This publication has 57 references indexed in Scilit:
- Graphene-like nano-sheets for surface acoustic wave gas sensor applicationsChemical Physics Letters, 2009
- Reduced Graphene Oxide Molecular SensorsNano Letters, 2008
- Transparent Carbon Films as Electrodes in Organic Solar CellsAngewandte Chemie-International Edition, 2008
- Electronic Transport Properties of Individual Chemically Reduced Graphene Oxide SheetsNano Letters, 2007
- A Chemical Route to Graphene for Device ApplicationsNano Letters, 2007
- Detection of individual gas molecules adsorbed on grapheneNature Materials, 2007
- Synthesis of graphene-based nanosheets via chemical reduction of exfoliated graphite oxideCarbon, 2007
- Graphene: New bridge between condensed matter physics and quantum electrodynamicsSolid State Communications, 2007
- The structure of suspended graphene sheetsNature, 2007
- Two-dimensional gas of massless Dirac fermions in grapheneNature, 2005