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Low-cost synthesis of Cu-modified immobilized nanoporous TiO2 for photocatalytic degradation of 1H-benzotriazole

Čižmar, Tihana; Panžić, Ivana; Salamon, Krešimir; Grčić, Ivana; Radetić, Lucija; Marčec, Jan; Gajović, Andreja (2020) Low-cost synthesis of Cu-modified immobilized nanoporous TiO2 for photocatalytic degradation of 1H-benzotriazole. Catalysts, 10 (1). ISSN 2073-4344

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Abstract

Cu-modification of immobilised nanoporous TiO2 photocatalysts, prepared by electrochemical anodization of titanium foils, were obtained via three different synthesis methods: hydrothermal synthesis, electrodeposition and spin-coating, using two different copper sources, Cu(NO3)2 and Cu(acac)2. Objective of this research was to investigate how copper modifications can improve the photocatalytic activity of immobilised nanoporous TiO2 under the UV/solar light irradiation. The best photocatalytic performances were obtained for Cu-modifications using spin coating. Therefore, the effect of irradiated catalyst surface size on the adsorption of model pollutants, methylene blue (MB) and 1H-benzotriazole (BT), was examined for samples with Cu-modification by spin-coating technique. The mechanisms responsible for increased degradation of MB and BT at high Cu concentrations (0.25 M and 0.5 M) and decreased degradation at low Cu loadings (0.0625 M and 0.125 M) were explained. 1H- benzotriazole was used to study photocatalytic activity of the given samples because it is highly toxic and present in most water systems. Characterization of the synthesized Cu-modified photocatalysts in the terms of phase composition, crystal structure and morphology was examined using X- ray Diffraction, Raman Spectroscopy, Scanning Electron Microscopy and Energy Dispersive X-ray spectroscopy.

Item Type: Article
Uncontrolled Keywords: immobilized nanoporous TiO2 ; electrochemical anodization ; Cu-modification ; photocatalytic activity ; spin-coating ; 1H-benzotriazole
Subjects: NATURAL SCIENCES > Physics
Divisions: Division of Materials Physics
Projects:
Project titleProject leaderProject codeProject type
Nanokompoziti s perovskitima za fotovoltaike, fotokatalizu i senzoriku-NanoPeroPhotoSensAndreja GajovićIP-2018-01-5246HRZZ
Depositing User: Sofija Konjević
Date Deposited: 15 Jan 2020 08:10
Last Modified: 15 Jan 2020 08:10
URI: http://fulir.irb.hr/id/eprint/5294
DOI: 10.3390/catal10010019

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