Crystal quality and optical property of MnWO4 nanoparticles synthesized by microwave-assisted method

Pham Van Hanh, Luc Huy Hoang, Pham Van Hai, Nguyen Van Minh, Xiang Bai Chen, In Sang Yang

Research output: Contribution to journalArticlepeer-review

21 Scopus citations

Abstract

MnWO4 nanoparticles were prepared using a microwave-assisted method followed by low-temperature treatment. The crystal quality and optical property of the MnWO4 nanoparticles were investigated by X-ray diffraction (XRD), scanning electron microscopy (SEM), Raman spectroscopy, and ultraviolet-visible (UV-vis) absorption spectroscopy. Our results show that good crystal quality MnWO4 nanoparticles can be prepared by the microwave-assisted method, and best crystal quality nanoparticles can be obtained with synthesizing pH value of 7. Furthermore, by calcination treatments, crystal quality can be further improved with less defect states and the particle size increases when the calcining temperature increases from 150 to 600 °C. In addition, our study shows that the MnWO4 nanoparticles have strong absorption in the visible light region, suggesting that these nanoparticles are promising for photocatalytic applications.

Original languageEnglish
Pages (from-to)426-430
Number of pages5
JournalJournal of Physics and Chemistry of Solids
Volume74
Issue number3
DOIs
StatePublished - Mar 2013

Bibliographical note

Funding Information:
The authors would like to thank the Vietnam's National Foundation for Science and Technology Development (NAFOSTED) , Grant 103.02.2010.04, for financial support. X.B.C. acknowledges the support by Konkuk University of 2012, I.S.Y. was supported by Leading Foreign Research Institute Recruitment Program, the Ministry of Education, Science and Technology ( 2011-00267 ).

Keywords

  • A. Nanostructures
  • B. Chemical synthesis
  • C. Raman spectroscopy
  • D. Defects
  • D. Optical properties

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