Increased Colloidal Stability and Decreased Solubility-Sol-Gel Synthesis of Zinc Oxide Nanoparticles with Humic Acids.

Author(s) Šebesta, M.; Koleněcík, M.; Urík, M.; Bujdoš, M.; Vávra, I.; Dobroěcka, E.; Smilek, J.; Kalina, M.; Diviš, P.; Pavúk, M.; Miglierini, M.; Kratošová, G.; Matúš, P.
Journal J Nanosci Nanotechnol
Date Published 2019 May 01
Abstract

Adding the humic acid coating to the nanoparticles of zinc oxide (ZnO-NP) may improve the properties necessary for their colloidal stability. To show how humic acid coating affects the properties of ZnO-NP, three differently sol-gel synthesized ZnO-NP were synthesized: pristine zinc oxide nanoparticles without coating (p-ZnO-NP) and humic acid coated zinc oxide nanoparticles at two different initial concentrations of 20 mg/L (HA20-ZnO-NP) and 200 mg/L (HA200-ZnO-NP) of humic acids in the starting solution. All ZnO-NP were found to be nanocrystals of mineral zincite exhibiting wurtzite crystal symmetry. Transmission electron microscopy showed that capping by humic acids during synthesis decreased the size of HA20-ZnO-NP and HA200-ZnO-NP compared to p-ZnO-NP nanoparticles. Via experiments, HA20-ZnO-NP were found to dissolve less and have a similar or higher stability than both p-ZnO-NP and HA200-ZnO-NP.

DOI 10.1166/jnn.2019.15868
ISSN 1533-4880
Citation Šebesta M, Koleněcík M, Urík M, Bujdoš M, Vávra I, Dobroěcka E, et al. Increased Colloidal Stability and Decreased Solubility-Sol-Gel Synthesis of Zinc Oxide Nanoparticles with Humic Acids. J Nanosci Nanotechnol. 2019;19(5):3024-3030.

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