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Photocatalytic Activity of Titanium Dioxide Immobilized in Polyacrylamide Hydrogels with Different Degrees of Crosslinking

Authors
  • Mansurov, R. R.1
  • Safronov, A. P.1, 2
  • Chernyuk, S. D.1
  • Zverev, V. S.1
  • 1 Yeltsin Ural Federal University, Yekaterinburg, 620002, Russia , Yekaterinburg (Russia)
  • 2 Institute of Electrophysics, Ural Branch, Russian Academy of Sciences, Yekaterinburg, 620016, Russia , Yekaterinburg (Russia)
Type
Published Article
Journal
Russian Journal of Applied Chemistry
Publisher
Pleiades Publishing
Publication Date
Jun 01, 2021
Volume
94
Issue
6
Pages
706–714
Identifiers
DOI: 10.1134/S1070427221060021
Source
Springer Nature
Keywords
Disciplines
  • Catalysis
License
Yellow

Abstract

AbstractComposite filamentary hydrogels based on cross-linked polyacrylamide, filled with TiO2 particles, were synthesized. The degree of crosslinking of the hydrogel matrix was set by the molar ratio of the cross-linking agent and monomer: 1 : 50, 1 : 100, 1 : 200, or 1 : 300. The diffusion of Methyl Orange dye in the polymer matrix as a function of the degree of crosslinking was studied by spectrophotometry, and the diffusion coefficient was calculated: 1.4 × 10–6, 1.8 × 10–6, 3.4 × 10–6, and 4.8 × 10–6 cm2 s–1, respectively. The photocatalytic activity of the composite hydrogels toward UV-induced degradation of a model dye, Methyl Orange, was studied. The effective rate constants of the photocatalytic degradation of the dye under the action of polyacrylamide/TiO2 composite hydrogels and aqueous TiO2 suspensions were determined. The presence of the hydrogel polymer matrix reduces the photocatalytic activity of TiO2 particles compared to the aqueous suspension containing the same amount of the particles. The photocatalytic activity of both aqueous TiO2 suspension and polyacrylamide/TiO2 composite hydrogel linearly depends on the total amount of TiO2 particles in the system.

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