INFLUENCE OF ACTIVE ACIDITY OF THE MEDIUM ON THE STABILITY OF MnO2 NANOPARTICLES
A.V. Blinov, D.G. Maglakelidze, A.A. Kravtsov and 5 more
Физико-химические аспекты изучения кластеров, наноструктур и наноматериалов · 2020
doi:10.26456/pcascnn/2020.12.033 (opens in a new tab)
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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.
Abstract licence: CC BY-NC-ND
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