Sol–Gel Synthesis of Au/Cu-TiO2 Nanocomposite and Their Morphological and Optical Properties
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06544609.pdf
Description
Published version
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786.46 KB
Format
Adobe PDF
Checksum (MD5)
1784f9659931cbe3633adf6e76a88280
Author(s)
Gondal, MA
Rashid, SG
Dastageer, MA
Zubair, SM
Ali, MA
Lienhard, John H
McKinley, GH
Varanasi, KK
Date Issued
2013
Journal
Photonics ,IEEE Journal
Publisher
Institute of Electrical and Electronics Engineers (IEEE)
Citation
Gondal, M. A., et al. "Sol-Gel Synthesis of Au/Cu-Tio2 Nanocomposite and Their Morphological and Optical Properties." IEEE Photonics Journal 5 3 (2013).
Version
Final published version
Abstract
A facile single-step method was adopted to synthesize gold-modified copper-doped titania nanocomposites. Physicochemical properties of the synthesized material were characterized by X-ray diffraction (XRD), diffuse reflectance spectroscopy, photoluminescence (PL), and TEM-based techniques. Our characterizations show that the material consisted of anatase-phase qausi-spherical titania nanoparticles (NPs), with 3-4-nm gold particles anchored on titania surface. According to diffuse UV-visible spectroscopic analysis, gold-modified copper-doped titania shows enhanced absorption in the visible-light spectrum compared with copper-doped titania and pure titania. Furthermore, a decrease in PL emission intensity is observed, and this is due to decreased electron-hole recombination, which is an attribute desired for the enhancement of photocatalytic activity. Our present results highlight that these nanocomposites could be used as a photocatalyst for various applications in conjunction with visible solar radiation. The surface modifications make this material for many applications such as gas sensing and photodetection. © 2009-2012 IEEE.
MIT Department
Massachusetts Institute of Technology. Department of Mechanical Engineering
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Article is made available in accordance with the publisher's policy and may be subject to US copyright law. Please refer to the publisher's site for terms of use.
Persistent DSpace Link
DOI of Published Version
10.1109/JPHOT.2013.2262674
https://doi.org/10.1109/JPHOT.2013.2262674
