Effect of microwave power on energy gap of ZnO nanoparticles synthesized by microwaving through aqueous solutions

© 2014 Elsevier Ltd. All rights reserved. Hexagonal wurtzite ZnO nanoparticles were successfully synthesized in aqueous solutions containing zinc acetate (Zn(OAc)2) and sodium hydroxide (NaOH) by microwaving at 400, 600 and 800 W for 6 min. The as-synthesized products analyzed by X-ray diffraction (...

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Main Authors: Promnopas,W., Thongtem,T., Thongtem,S.
Format: Article
Published: Academic Press Inc. 2015
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http://cmuir.cmu.ac.th/handle/6653943832/38841
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spelling th-cmuir.6653943832-388412015-06-16T07:54:22Z Effect of microwave power on energy gap of ZnO nanoparticles synthesized by microwaving through aqueous solutions Promnopas,W. Thongtem,T. Thongtem,S. Electrical and Electronic Engineering Materials Science (all) Condensed Matter Physics © 2014 Elsevier Ltd. All rights reserved. Hexagonal wurtzite ZnO nanoparticles were successfully synthesized in aqueous solutions containing zinc acetate (Zn(OAc)2) and sodium hydroxide (NaOH) by microwaving at 400, 600 and 800 W for 6 min. The as-synthesized products analyzed by X-ray diffraction (XRD), scanning electron microscopy (SEM) and Raman spectroscopy were pure hexagonal wurtzite ZnO nanostructure with sharp and strong optical phonon Raman-active mode of E2H at 438.7 cm-1 and in the shape of nanoparticles clustered together as nanoplate-nanorod mixture with different orientations. The central photoluminescence (PL) emission was detected at 378.9-382.4 nm of UV region, due to the recombination of excitons. The energy band gap of the as-synthesized products characterized by UV-visible absorption spectroscopy was decreased form 3.20 eV to 3.01 eV by increasing in the microwaving power from 400 W to 800 W, due to the decreasing in the full width at half maximum (FWHM) of the XRD main peaks and the improvement of crystalline degree of the products. 2015-06-16T07:54:22Z 2015-06-16T07:54:22Z 2015-01-01 Article 07496036 2-s2.0-84919625625 10.1016/j.spmi.2014.11.021 http://www.scopus.com/inward/record.url?partnerID=HzOxMe3b&scp=84919625625&origin=inward http://cmuir.cmu.ac.th/handle/6653943832/38841 Academic Press Inc.
institution Chiang Mai University
building Chiang Mai University Library
country Thailand
collection CMU Intellectual Repository
topic Electrical and Electronic Engineering
Materials Science (all)
Condensed Matter Physics
spellingShingle Electrical and Electronic Engineering
Materials Science (all)
Condensed Matter Physics
Promnopas,W.
Thongtem,T.
Thongtem,S.
Effect of microwave power on energy gap of ZnO nanoparticles synthesized by microwaving through aqueous solutions
description © 2014 Elsevier Ltd. All rights reserved. Hexagonal wurtzite ZnO nanoparticles were successfully synthesized in aqueous solutions containing zinc acetate (Zn(OAc)2) and sodium hydroxide (NaOH) by microwaving at 400, 600 and 800 W for 6 min. The as-synthesized products analyzed by X-ray diffraction (XRD), scanning electron microscopy (SEM) and Raman spectroscopy were pure hexagonal wurtzite ZnO nanostructure with sharp and strong optical phonon Raman-active mode of E2H at 438.7 cm-1 and in the shape of nanoparticles clustered together as nanoplate-nanorod mixture with different orientations. The central photoluminescence (PL) emission was detected at 378.9-382.4 nm of UV region, due to the recombination of excitons. The energy band gap of the as-synthesized products characterized by UV-visible absorption spectroscopy was decreased form 3.20 eV to 3.01 eV by increasing in the microwaving power from 400 W to 800 W, due to the decreasing in the full width at half maximum (FWHM) of the XRD main peaks and the improvement of crystalline degree of the products.
format Article
author Promnopas,W.
Thongtem,T.
Thongtem,S.
author_facet Promnopas,W.
Thongtem,T.
Thongtem,S.
author_sort Promnopas,W.
title Effect of microwave power on energy gap of ZnO nanoparticles synthesized by microwaving through aqueous solutions
title_short Effect of microwave power on energy gap of ZnO nanoparticles synthesized by microwaving through aqueous solutions
title_full Effect of microwave power on energy gap of ZnO nanoparticles synthesized by microwaving through aqueous solutions
title_fullStr Effect of microwave power on energy gap of ZnO nanoparticles synthesized by microwaving through aqueous solutions
title_full_unstemmed Effect of microwave power on energy gap of ZnO nanoparticles synthesized by microwaving through aqueous solutions
title_sort effect of microwave power on energy gap of zno nanoparticles synthesized by microwaving through aqueous solutions
publisher Academic Press Inc.
publishDate 2015
url http://www.scopus.com/inward/record.url?partnerID=HzOxMe3b&scp=84919625625&origin=inward
http://cmuir.cmu.ac.th/handle/6653943832/38841
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