Effect of Calcination Temperature on the Structural, Thermodynamic, and Optical Properties of MoO3 Nanoparticles

Effect of Calcination Temperature on the Structural, Thermodynamic, and Optical Properties of... Temperature dependence of the structural, thermodynamic, and optical properties of MoO3 nanoparticles synthesized using sol–gel and sonication methods were studied. MoO3 nanoparticles showed variation in crystallite shape from hexagonal to orthorhombic and crystallite size in the range 3.05–5.21 nm with bandgap in the range 4.11–4.36 eV with change in the calcination temperature and the method of synthesis. Rietveld refinement of the X‐ray diffraction (XRD) data confirmed the crystallite phase transition with space group PE and Pbnm with change in the lattice parameter ratio. Activation energy was calculated using XRD and TGA–DSC (thermogravimetry–differential thermal analysis) data and was found to be close to 4 kJ/mol. The bandgap fluctuation was due to the size dependence of the blue shift, which indicates strong quantum confinement due to the Bohr radius effect. Optical parameters such as the extinction coefficient, refractive index, optical conductivity, dielectric functions, and Urbach energy were calculated and found to depend on electron–phonon interactions. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Journal of the Chinese Chemical Society Wiley

Effect of Calcination Temperature on the Structural, Thermodynamic, and Optical Properties of MoO3 Nanoparticles

Loading next page...
 
/lp/wiley/effect-of-calcination-temperature-on-the-structural-thermodynamic-and-P0yYMr0Cke
Publisher
Wiley
Copyright
© 2018 The Chemical Society Located in Taipei & Wiley‐VCH Verlag GmbH & Co. KGaA, Weinheim
ISSN
0009-4536
eISSN
2192-6549
D.O.I.
10.1002/jccs.201700163
Publisher site
See Article on Publisher Site

Abstract

Temperature dependence of the structural, thermodynamic, and optical properties of MoO3 nanoparticles synthesized using sol–gel and sonication methods were studied. MoO3 nanoparticles showed variation in crystallite shape from hexagonal to orthorhombic and crystallite size in the range 3.05–5.21 nm with bandgap in the range 4.11–4.36 eV with change in the calcination temperature and the method of synthesis. Rietveld refinement of the X‐ray diffraction (XRD) data confirmed the crystallite phase transition with space group PE and Pbnm with change in the lattice parameter ratio. Activation energy was calculated using XRD and TGA–DSC (thermogravimetry–differential thermal analysis) data and was found to be close to 4 kJ/mol. The bandgap fluctuation was due to the size dependence of the blue shift, which indicates strong quantum confinement due to the Bohr radius effect. Optical parameters such as the extinction coefficient, refractive index, optical conductivity, dielectric functions, and Urbach energy were calculated and found to depend on electron–phonon interactions.

Journal

Journal of the Chinese Chemical SocietyWiley

Published: Jan 1, 2018

Keywords: ; ; ; ;

References

You’re reading a free preview. Subscribe to read the entire article.


DeepDyve is your
personal research library

It’s your single place to instantly
discover and read the research
that matters to you.

Enjoy affordable access to
over 18 million articles from more than
15,000 peer-reviewed journals.

All for just $49/month

Explore the DeepDyve Library

Search

Query the DeepDyve database, plus search all of PubMed and Google Scholar seamlessly

Organize

Save any article or search result from DeepDyve, PubMed, and Google Scholar... all in one place.

Access

Get unlimited, online access to over 18 million full-text articles from more than 15,000 scientific journals.

Your journals are on DeepDyve

Read from thousands of the leading scholarly journals from SpringerNature, Elsevier, Wiley-Blackwell, Oxford University Press and more.

All the latest content is available, no embargo periods.

See the journals in your area

DeepDyve

Freelancer

DeepDyve

Pro

Price

FREE

$49/month
$360/year

Save searches from
Google Scholar,
PubMed

Create lists to
organize your research

Export lists, citations

Read DeepDyve articles

Abstract access only

Unlimited access to over
18 million full-text articles

Print

20 pages / month

PDF Discount

20% off