Abstract
ZnO–SnO2 nanostructures are of great interest in practical applications such as optoelectronic devices, gas sensors and catalyst supports due to their excellent optoelectronic and highly sensitive gas sensing properties. In the present work, oxide powders of Sn, Sn/Zn = 1:1, Sn/Zn = 1:2 and Zn were synthesized by sol–gel method. Thermal behavior of the obtained gels was determined by thermogravimetry and differential thermal analysis coupled on-line with mass spectrometry (TG/DTA–MS) in air and nitrogen atmosphere. In air, endothermic effects due to the decomposition of the precursors and exothermic effects due to the oxidation of the organic part were observed. In the case of nitrogen atmosphere, only endothermic effects take place. The XRD and FTIR investigations have shown the same structure both for DTA resulted residues in air and for samples isothermally treated at 500 °C for 1 h. Based on the obtained results, the thermal treatment of the samples was established depending on their intended applications. In the experimental conditions used, the formation of ZnSnO3 was not confirmed.
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Acknowledgements
I. M. Szilágyi thanks for a János Bolyai Research Fellowship of the Hungarian Academy of Sciences and an ÚNKP-17-4-IV-BME-188 grant supported by the ÚNKP-17-4-IV New National Excellence Program of the Ministry of Human Capacities, Hungary. The research within project No. VEKOP-2.3.2-16-2017-00013 was supported by the European Union and the State of Hungary, co-financed by the European Regional Development Fund. An NRDI K 124212 and an NRDI TNN_16 123631 grants are acknowledged. A Romanian Academy–Hungarian Academy of Sciences Joint Research Project for Research Mobility is acknowledged. We acknowledge as well the support of the EU (ERDF) and Romanian Government that allowed for the acquisition of the research infrastructure under POS-CCE O 2.2.1 project INFRANANOCHEM—No. 19/01.03.2009, and PN-II-PT-PCCA-2013-4-1487 project, Electronic Nose for detection of low concentration pollutant and explosive gases.
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Vladut, C.M., Mihaiu, S., Szilágyi, I.M. et al. Thermal investigations of the Sn–Zn–O gels obtained by sol–gel method. J Therm Anal Calorim 136, 461–470 (2019). https://doi.org/10.1007/s10973-018-7641-9
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DOI: https://doi.org/10.1007/s10973-018-7641-9