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Enhanced photocatalytic activity of ultra-high aspect ratio ZnO nanowires due to Cu induced defects

Sugavaneshwar, Ramu Pasupathi and Dao, Thang Duy and Nanda, Karuna Kar and Nagao, Tadaaki and Hishita, Shunichi and Sakaguchi, Isao (2016) Enhanced photocatalytic activity of ultra-high aspect ratio ZnO nanowires due to Cu induced defects. In: RADIATION EFFECTS AND DEFECTS IN SOLIDS, 170 (12). pp. 939-944.

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Official URL: http://dx.doi.org/10.1080/10420150.2015.1123258

Abstract

We report the synthesis of ZnO nanowires in ambient air at 650 degrees C by a single-step vapor transport method using two different sources Zn (ZnO nanowires-I) and Zn:Cu (ZnO nanowires-II). The Zn:Cu mixed source co-vaporize Zn with a small amount of Cu at temperatures where elemental Cu source does not vaporize. This method provides us a facile route for Cu doping into ZnO. The aspect ratio of the grown ZnO nanowires-II was found to be higher by more than five times compared ZnO nanowires-I. Photocatalytic activity was measured by using a solar simulator and its ultraviolet-filtered light. The ZnO nanowires-II shows higher catalytic activity due to increased aspect ratio and higher content of surface defects because of incorporation of Cu impurities.

Item Type: Journal Article
Additional Information: Copy right for this article belongs to the TAYLOR & FRANCIS LTD, 4 PARK SQUARE, MILTON PARK, ABINGDON OX14 4RN, OXON, ENGLAND
Keywords: nanostructures; doping; metal oxides
Department/Centre: Division of Chemical Sciences > Materials Research Centre
Depositing User: Id for Latest eprints
Date Deposited: 12 May 2016 05:19
Last Modified: 12 May 2016 05:19
URI: http://eprints.iisc.ac.in/id/eprint/53824

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