Abstract
Synthesis of ultradisperse spherical ZnO powders was accomplished by spray solution combustion, employing four distinct fuels, namely methenamine, glycine, urea, and citric acid. Using X-ray diffraction analysis, scanning electron microscopy, and low-temperature nitrogen adsorption, the impact of the main process parameters (composition and concentration of fuel, temperature and rate of the carrier gas flow) on the structure and morphology of ZnO particles was demonstrated. A synthesis temperature of 700°C was found to be sufficient to generate crystalline ZnO with a homogeneous phase composition, regardless of the type and amount of fuel. It was shown that the initial pH of the precursor solution does not affect the formation of the ZnO phase. At rates of carrier gas flow above 4 L min–1, the presence of by-products is detected. It has been determined that the excess and type of fuel significantly affect the morphology of the synthesized ZnO microspheres and can be used to control the technological characteristics of the powder and the kinetics of sintering.
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ACKNOWLEDGMENTS
The team of authors expresses special gratitude to the project leader S.N. Yudin for an informative discussion of the results of the work and useful comments. The team also thanks the scientific editor of the journal M.L. Khrushcheva for the painstaking work done, which helped to significantly improve the quality of the article.
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This work was supported by the Russian Science Foundation under grant no. 22 79-10278.
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Zh.S. Yermekova, S.I. Roslyakov, and S.V. Savilov: develo** the experimental methodology and concept of the article; Zh.S. Yermekova, E.V. Chernyshova: collecting literature data to substantiate the relevance of the study; Zh.S. Yermekova, S.S. Yurlov: synthesis of the samples; D.V. Bindyug, E.V. Chernyshova, S.I. Roslyakov: conduction of research using X-ray diffraction analysis with a description and analysis of the results obtained; E.V. Chernyshova, S.S. Yurlov: conduction of research using scanning electron microscopy.
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Translated from Zhurnal Prikladnoi Khimii, No. 4, pp. 330–336, August, 2023 https://doi.org/10.31857/S0044461823040011
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Yermekova, Z.S., Roslyakov, S.I., Yurlov, S.S. et al. Effect of the Nature and Concentration of the Fuel on the Structure and Morphology of ZnO Microspheres Produced via Spray Solution Combustion Synthesis. Russ J Appl Chem 96, 403–409 (2023). https://doi.org/10.1134/S1070427223040018
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DOI: https://doi.org/10.1134/S1070427223040018