Research output: Contribution to journal › Article › peer-review
Nanocrystalline Complex Oxides ZnxCo3−xO4 : Cobalt and Zinc Ions Impact on Large Growth of Conductivity. / Martyshov, Mikhail N.; Konstantinova, Elizaveta A.; Ilin, Alexander S.; Kozlovskaya, Ksenia E.; Koroleva, Alexandra V.; Bozhev, Ivan V.; Rumyantseva, Marina N.; Kashkarov, Pavel K.
In: Journal of Physical Chemistry C, Vol. 126, No. 26, 07.07.2022, p. 10800–10806.Research output: Contribution to journal › Article › peer-review
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TY - JOUR
T1 - Nanocrystalline Complex Oxides ZnxCo3−xO4
T2 - Cobalt and Zinc Ions Impact on Large Growth of Conductivity
AU - Martyshov, Mikhail N.
AU - Konstantinova, Elizaveta A.
AU - Ilin, Alexander S.
AU - Kozlovskaya, Ksenia E.
AU - Koroleva, Alexandra V.
AU - Bozhev, Ivan V.
AU - Rumyantseva, Marina N.
AU - Kashkarov, Pavel K.
N1 - Publisher Copyright: © 2022 American Chemical Society. All rights reserved.
PY - 2022/7/7
Y1 - 2022/7/7
N2 - Cobalt oxide based nanostructures are perspective materials for gas sensors, photocatalysts, and other devices for ecology applications due to the high concentration of chemisorbed oxygen and catalytic activity in oxidation reactions. Finely dispersed nanocrystalline oxides ZnxCo3−xO4 (0 ≤ x ≤ 1) with a high level of conductivity have been synthesized by the chemical precipitation of oxalates with subsequent thermal treatment. Comprehensive studies of the morphology, electrophysical properties, nature and concentration of defects in the obtained materials were carried out. It is shown that the introduction of zinc atoms to the Co3O4 structure leads to a sharp increase in conductivity by more than 5 orders of magnitude. In addition, the zinc-induced interplay of Co2+ spin centers between tetrahedral and octahedral sites was revealed using the EPR method. The correlation between the conductivity and the concentration of Co2+ ions in tetrahedral and octahedral environments was established for the first time. The obtained results open up the possibility of fine-tuning the electronic properties of nanostructured ZnxCo3−xO4 by variation of zinc concentration in the samples.
AB - Cobalt oxide based nanostructures are perspective materials for gas sensors, photocatalysts, and other devices for ecology applications due to the high concentration of chemisorbed oxygen and catalytic activity in oxidation reactions. Finely dispersed nanocrystalline oxides ZnxCo3−xO4 (0 ≤ x ≤ 1) with a high level of conductivity have been synthesized by the chemical precipitation of oxalates with subsequent thermal treatment. Comprehensive studies of the morphology, electrophysical properties, nature and concentration of defects in the obtained materials were carried out. It is shown that the introduction of zinc atoms to the Co3O4 structure leads to a sharp increase in conductivity by more than 5 orders of magnitude. In addition, the zinc-induced interplay of Co2+ spin centers between tetrahedral and octahedral sites was revealed using the EPR method. The correlation between the conductivity and the concentration of Co2+ ions in tetrahedral and octahedral environments was established for the first time. The obtained results open up the possibility of fine-tuning the electronic properties of nanostructured ZnxCo3−xO4 by variation of zinc concentration in the samples.
UR - http://www.scopus.com/inward/record.url?scp=85135248968&partnerID=8YFLogxK
UR - https://www.mendeley.com/catalogue/d4b9462d-da3d-3458-85d0-bb2def9d3cfc/
U2 - 10.1021/acs.jpcc.2c01034
DO - 10.1021/acs.jpcc.2c01034
M3 - Article
AN - SCOPUS:85135248968
VL - 126
SP - 10800
EP - 10806
JO - Journal of Physical Chemistry C
JF - Journal of Physical Chemistry C
SN - 1932-7447
IS - 26
ER -
ID: 97568985