Open AccessNanostructured mesoporous g-Fe2O3: a novel photocatalyst for degradation of organic pollutants
Author(s) -
A. B. Hrubiak,
О.Y. Khyzhun,
B. K. Ostafiychuk,
V.V. Moklyak,
Y. V. Yavorskyi,
R. P. Lisovsky,
L.G. Keush,
B.B. Onyskiv
Publication year - 2021
Publication title -
fìzika ì hìmìâ tverdogo tìla
Language(s) - English
Resource type - Journals
eISSN - 2309-8589
pISSN - 1729-4428
DOI - 10.15330/pcss.22.1.101-109
Subject(s) - maghemite , mesoporous material , photocatalysis , materials science , specific surface area , x ray photoelectron spectroscopy , chemical engineering , band gap , degradation (telecommunications) , conductivity , particle size , nanoparticle , nanotechnology , catalysis , chemistry , organic chemistry , telecommunications , optoelectronics , computer science , engineering
The modified sol-gel synthesis technique was used to created of nanostructured maghemite (γ-Fe2O3). It has been shown that the molar concentration of the original precursors during synthesis affects on the average particle sizes, specific surface area, pore size distributions, optical and conductivity properties. The XPS metod allowed to establish features of electronic structure of the synthesized materials. Optimal conditions for the synthesis of nanostructured maghemite with mesoporous structure were selected. The mechanism of electrical conductivity formation for synthesized mesoporous materials was established. The width of the band gap is determined and its dependence on the molar concentration of precursors is established. The positive correlation between the specific surface area of γ-Fe2O3 samples and photocatalytic activity was installed - the photocatalytic activity of synthesized γ-Fe2O3 increase with growth of specific surface area of γ-Fe2O3 samples.