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- Title
Synthesis of TiO<sub>2</sub>/rGO Nanocomposites with Enhanced Photoelectrochemical Performance and Photocatalytic Activity.
- Authors
Kong, Dewang; Zhao, Min; Li, Shikuo; Huang, Fangzhi; Song, Jiming; Yuan, Yupeng; Shen, Yuhua; Xie, Anjian
- Abstract
In this paper, a facile and efficient method combined sol-gel method with hydrothermal process was employed for preparing titanium dioxide (TiO/reduced graphene oxide (rGO) nanocomposites without using any reductants or surfactants. This approach leads to the reduction of graphene oxide (GO) and the growth of TiO2 nanorods simultaneously. The results reveal that the TiO2 short nanorods with average size of 15nm in length and 10nm in diameter were uniformly grown on the rGO sheets with high dispersion. Compared with the pure TiO2 nanoparticles, the TiO2/rGO composites exhibit strong absorption in the visible light range. The photocurrent density of nanocomposites reached 0.826mA/cm2 under the simulated sunlight illumination, which is 3.5 times than that of pure TiO2. An enhancement of photocatalytic hydrogen formation rate for the water splitting was observed over the TiO2/rGO composite photocatalysts, the fastest formation rate can reach 889.28molgh when TiO2 coupling with 1wt.% rGO. Also the hydrogen production rate is about 3.27 times larger than pure TiO2 and 2.23 times than P25 due to the excellent electron trapping and transportation properties of rGO and the synergistic effect between TiO2 and rGO. TiO2 nanocomposites were prepared by employing a modifued sol-gel technology, combined with hydrothermal method. The TiO2 short nanorods, with average size of 15nm in length and 10nm in diameter, were uniformly grown on the rGO sheets with high dispersion. The obtained TiO2/rGO nanocomposites with 1 wt% rGO exhibit high photoelectrochemical performance and excellent photocatalytic activity towards water splitting.
- Subjects
PHOTOCATALYSIS; GRAPHENE oxide; CATALYSIS; TITANIUM dioxide; TITANIUM oxides
- Publication
NANO, 2016, Vol 11, Issue 1, p-1
- ISSN
1793-2920
- Publication type
Article
- DOI
10.1142/S1793292016500077