Influence of active acidity of the medium on the stability of MnO2 nanoparticles
A.V. Blinov1, D.G. Maglakelidze1, A.A. Kravtsov1,2, A.A. Blinova1, A.A. Gvozdenko1, A.B. Golik1, V.V. Raffa1, E.V. Konovalova1
1 North Caucasus Federal University
2 Federal Research Centre The Southern Scientific Centre of the Russian Academy of Sciences
Abstract: In this work, for the first time the results of studying the microstructure of manganese dioxide nanoparticles stabilized with sulfur-containing amino acids are presented. According to the results of scanning electron microscopy, nanoparticles with a diameter of 15-30 nm were presented in the samples. The optimal mass ratios of precursors were established by means of spectrophotometry, to obtain stable sols of manganese dioxide nanoparticles. The optimal mass ratios were: KMnO4: methionine – 1:1 and KMnO4: cysteine – 3:1. Investigation of the effect of the medium active acidity on the stability of manganese dioxide nanoparticles showed that MnO2 samples obtained with methionine are stable at 4 ≤ pH ≤ 11, and with cysteine – at 5 ≤ pH ≤ 8.
Keywords: active acidity of the medium, manganese dioxide, nanoparticles, spectrophotometry
- Andrey V. Blinov – Senior Lecturer of the Department of Electronics and Nanotechnology of the Engineering Institute, North Caucasus Federal University
- David G. Maglakelidze – 1st year student of the Department of Electronics and Nanotechnology of the Engineering Institute, North Caucasus Federal University
- Alexander A. Kravtsov – Researcher, Research Laboratory of Ceramics and Technochemistry, Research and Laboratory Complex of Clean Zones of the Engineering Institute, North Caucasus Federal University, Ph. D., Senior Researcher of the Laboratory of Physics and Technology of Semiconductor Nanoheterostructures for Microwave Electronics and Photonics Federal Research Centre The Southern Scientific Centre of the Russian Academy of Sciences
- Anastasiya A. Blinova – Ph. D., Docent of the Department of Electronics and Nanotechnology of the Engineering Institute, North Caucasus Federal University
- Aleksey A. Gvozdenko – 3rd year student of the Department of Electronics and Nanotechnology of the Engineering Institute, North Caucasus Federal University
- Aleksey B. Golik – 3rd student of the Department of Electronics and Nanotechnology of the Engineering Institute, North Caucasus Federal University
- Vladislav V. Raffa – 2nd year student of the Department of Electronics and Nanotechnology of the Engineering Institute, North Caucasus Federal University
- Ekaterina V. Konovalova – , North Caucasus Federal University
Blinov, A.V. Influence of active acidity of the medium on the stability of MnO2 nanoparticles / A.V. Blinov, D.G. Maglakelidze, A.A. Kravtsov, A.A. Blinova, A.A. Gvozdenko, A.B. Golik, V.V. Raffa, E.V. Konovalova // Physical and chemical aspects of the study of clusters, nanostructures and nanomaterials. — 2020. — I. 12. — P. 33-41. DOI: 10.26456/pcascnn/2020.12.033. (In Russian).
Full article (in Russian): download PDF file
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