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Enhanced Visible-Light Driven Photocatalytic Activity of Ag@TiO2 Photocatalyst Prepared in Chitosan Matrix

Grčić, Ivana; Gajović, Andreja; Plodinec, Milivoj; Šimunković, Kristina; Ivanković, Hrvoje; Willinger, Marc-Georg (2020) Enhanced Visible-Light Driven Photocatalytic Activity of Ag@TiO2 Photocatalyst Prepared in Chitosan Matrix. Catalysts, 10 (7). ISSN 2073-4344

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Abstract

Ag doped TiO2 photocatalysts (Ag@TiO2) were prepared with an aim to extend the absorption range of TiO2 into the visible region, for tentative application under solar irradiation. Photocatalyst synthesized by the novel method using chitosan for reduction of Ag+ to Ag0 nanoparticles was compared to similar catalysts previously reported. The photocatalytic activity of Ag@TiO2 obtained by a simple novel method was evaluated based on degradation of salicylic acid as a model compound. The higher activity under visible irradiation can be attributed to the surface plasmon resonance and suppression of the electron-hole recombination when deposition of Ag nanoparticles on TiO2 was achieved using chitosan. The photocatalysts were characterized by X-ray diffraction (XRD), Raman spectroscopy, transmission electron microscopy (TEM), high resolution TEM (HRTEM), energy dispersive X-ray spectroscopy (EDXS), selected area diffraction (SAED), and diffuse reflectance spectroscopy (DRS). The photochromism of Ag was observed and explained.

Item Type: Article
Uncontrolled Keywords: Ag-doped TiO2 ; chitosan ; solar photocatalysis ; photochromism
Subjects: TECHNICAL SCIENCES > Interdisciplinary Technical Sciences
Divisions: Division of Materials Physics
Depositing User: Andreja Gajović
Date Deposited: 07 Dec 2020 13:21
Last Modified: 07 Dec 2020 13:21
URI: http://fulir.irb.hr/id/eprint/6087
DOI: 10.3390/catal10070763

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