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  • 1 Budapest University of Technology and Economics Materials Structure and Modeling Research Group of the Hungarian Academy of Sciences 1111 Budapest Szt. Gellért tér 4 Hungary
  • | 2 Budapest University of Technology and Economics Department of Inorganic and Analytical Chemistry 1111 Budapest Szt. Gellért tér 4 Hungary
  • | 3 GE Hungary ZRt., GE Consumer and Industrial — Lighting 1340 Budapest Váci út 77 Hungary
  • | 4 University of Pannonia NMR Laboratory 8200 Veszprém Egyetem u. 10 Hungary
  • | 5 Hungarian Academy of Sciences Research Institute for Technical Physics and Materials Science 1121 Budapest Konkoly-Thege út 29-33, Budapest Hungary
  • | 6 Budapest University of Technology and Economics Department of Atomic Physics 1111 Budapest Budafoki út 8 Hungary
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Abstract  

This paper discusses the changes in the structure and thermal reduction of nanosize hexagonal ammonium tungsten bronze (HATB), (NH4)0.33−xWO3−y, which were caused by K+ ion exchange (doping) and studied by XRD, XPS, 1H-MAS NMR, FTIR, SEM and TG/DTA-MS. Comparison of the cell parameters of undoped and doped HATB revealed that both a and c cell parameters decreased after the ion exchange reaction, which showed that smaller K+ ions partly replaced the larger NH4+ ions in the hexagonal channels of HATB. After the reaction, from the hexagonal channels less NH3 evolved, which also supported the incorporation of K+ ions into the hexagonal channels.

Manuscript Submission: HERE

  • Impact Factor (2019): 2.731
  • Scimago Journal Rank (2019): 0.415
  • SJR Hirsch-Index (2019): 87
  • SJR Quartile Score (2019): Q3 Condensed Matter Physics
  • SJR Quartile Score (2019): Q3 Physical and Theoretical Chemistry
  • Impact Factor (2018): 2.471
  • Scimago Journal Rank (2018): 0.634
  • SJR Hirsch-Index (2018): 78
  • SJR Quartile Score (2018): Q2 Condensed Matter Physics
  • SJR Quartile Score (2018): Q2 Physical and Theoretical Chemistry

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Journal of Thermal Analysis and Calorimetry
Language English
Size A4
Year of
Foundation
1969
Volumes
per Year
4
Issues
per Year
24
Founder Akadémiai Kiadó
Founder's
Address
H-1117 Budapest, Hungary 1516 Budapest, PO Box 245.
Publisher Akadémiai Kiadó
Springer Nature Switzerland AG
Publisher's
Address
H-1117 Budapest, Hungary 1516 Budapest, PO Box 245.
CH-6330 Cham, Switzerland Gewerbestrasse 11.
Responsible
Publisher
Chief Executive Officer, Akadémiai Kiadó
ISSN 1388-6150 (Print)
ISSN 1588-2926 (Online)

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