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The Effect of Sintering Temperature on Mesoporous Structure of WO3 Doped Tio(2) Powders

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2018
2347.pdf (742.6Kb)
Authors
Petrović, Srđan
Rožić, Ljiljana
Stojadinović, Stevan
Grbić, Boško
Vasilic, Rastko
Vuković, Zorica
Radić, Nenad
Article (Published version)
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Abstract
In this study, WO3 doped TiO2 powders were synthesized via sol-gel method combined with a hydrothermal process. The effect of sintering temperature on mesoporous structure and catalytic activities of these powders were investigated. The physical analysis via X-ray diffraction indicates that prepared samples are a mixture of anatase and rutile TiO2 phases. X-ray peak analysis is used to evaluate the crystallite size and lattice strain by the Williamson-Hall analysis. Considering all the reflections of the anatase phase the lattice strain ranging from c = 9.505 to c = 9.548 is calculated, suggesting that microstrain decreases when calcination temperature increases. N-2 adsorption-desorption analysis shows that the surface area and pore volume decrease with increasing temperature and that WOx-TiO2 powders primarily consist of mesopores. Sintering temperature induced a change in textural properties causing a systematic shift towards larger mesopores. Simultaneously, photoactivity in decolo...rization of methyl orange increases with increasing calcination temperature up to 700 degrees C, followed by significant decrease with its further increase.

Keywords:
WOx-TiO2 powders / Sintering / Mesoporous structure / Photocatalytic / degradation / Azo dye
Source:
Science of Sintering, 2018, 50, 1, 123-132
Publisher:
  • International Institute for the Science of Sintering, Beograd
Projects:
  • The development of efficient chemical-engineering processes based on the transport phenomena research and process intensification principles (RS-172022)
  • Chemical and structural designing of nanomaterials for application in medicine and tissue engineering (RS-172026)
  • Dynamics of nonlinear physicochemical and biochemical systems with modeling and predicting of their behavior under nonequilibrium conditions (RS-172015)
  • Oxide-based environmentally-friendly porous materials for genotoxic substances removal (RS-172018)
  • The study of physicochemical and biochemical processes in living environment that have impacts on pollution and the investigation of possibilities for minimizing the consequences (RS-172001)
  • Nanostructured Functional and Composite Materials in Catalytic and Sorption Processes (RS-45001)

DOI: 10.2298/SOS1801123P

ISSN: 0350-820X

WoS: 000429909100011

Scopus: 2-s2.0-85053941693
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URI
http://cer.ihtm.bg.ac.rs/handle/123456789/2349
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