Preparing undoped and Mn-doped ZnO nanoparticles: a comparison between sol–gel and gel-combustion methods

Undoped and Mn doped ZnO nanoparticles were synthesized by two wet chemical techniques: sol–gel and gel-combustion. We were able to prepare Mn-doped ZnO nanoparticles free from the second phases at calcining temperatures 400 and 500 °C using sol–gel and gel combustion, respectively. Complete crystal...

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Bibliographic Details
Published in:	Journal of sol-gel science and technology Vol. 62; no. 2; pp. 153 - 159
Main Authors:	Ebrahimizadeh Abrishami, M., Kompany, A., Hosseini, S. M., Ghajari Bardar, N.
Format:	Journal Article
Language:	English
Published:	Boston Springer US 01-05-2012 Springer Springer Nature B.V
Subjects:	Ceramics Chemical synthesis Chemistry Chemistry and Materials Science Colloidal gels. Colloidal sols Colloidal state and disperse state Combustion Composites Crystallization Energy gap Exact sciences and technology General and physical chemistry Glass Inorganic Chemistry Manganese Materials Science Nanoparticles Nanotechnology Natural Materials Optical and Electronic Materials Optical properties Organic chemistry Original Paper Physical and chemical studies. Granulometry. Electrokinetic phenomena Sol-gel processes Solid solutions Zinc oxide ZnO Gel-combustion Sol–gel Optical properties Mn doping Binary compound Particle size Nanoparticle Transition element compounds Crystallization Doping Combustion Lattice parameters Solid solution Calcining Characterization Infrared spectrometry Sol―gel Transmission electron microscopy Energy Sol gel process Ultraviolet visible spectrometry
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Summary:	Undoped and Mn doped ZnO nanoparticles were synthesized by two wet chemical techniques: sol–gel and gel-combustion. We were able to prepare Mn-doped ZnO nanoparticles free from the second phases at calcining temperatures 400 and 500 °C using sol–gel and gel combustion, respectively. Complete crystallization occurs in both methods, but it is found that the crystallization is better performed in the ZnO based solid solution prepared by the sol–gel method. TEM images show that the average size of the nanoparticles synthesized by gel-combustion is smaller than that of prepared by sol–gel method. Optical characterizations such as vibrational properties, lattice dynamical parameters, absorption edges and optical band gap energies were also carried out by FTIR and UV–Vis spectroscopies. The quantitative estimations led to the conclusion that the effects of the method on the particle size and the optical band gap energy of the prepared samples are very significant.
Bibliography:	ObjectType-Article-1 SourceType-Scholarly Journals-1 ObjectType-Feature-2 content type line 23
ISSN:	0928-0707 1573-4846
DOI:	10.1007/s10971-012-2701-2