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Article

Enhanced Visible and Ultraviolet Light-Induced Gas-Phase Photocatalytic Activity of TiO2 Thin Films Modified by Increased Amount of Acetylacetone in Precursor Solution for Spray Pyrolysis

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Laboratory of Thin Films Chemical Technologies, Department of Materials and Environmental Technology, Tallinn University of Technology, Ehitajate tee 5, 19086 Tallinn, Estonia
2
Laboratory of Environmental Toxicology, National Institute of Chemical Physics and Biophysics, Akadeemia tee 23, 12618 Tallinn, Estonia
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Department of Chemistry and Biotechnology, Tallinn University of Technology, Akadeemia tee 15, 12618 Tallinn, Estonia
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Estonian Academy of Sciences, Kohtu 6, 10130 Tallinn, Estonia
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Laboratory of Optoelectronic Materials Physics, Department of Materials and Environmental Technology, Tallinn University of Technology, Ehitajate tee 5, 19086 Tallinn, Estonia
6
Laboratory of Environmental Technology, Department of Materials and Environmental Technology, Tallinn University of Technology, Ehitajate tee 5, 19086 Tallinn, Estonia
*
Authors to whom correspondence should be addressed.
Catalysts 2020, 10(9), 1011; https://doi.org/10.3390/catal10091011
Received: 23 July 2020 / Revised: 23 August 2020 / Accepted: 1 September 2020 / Published: 3 September 2020
(This article belongs to the Special Issue TiO2 for Photocatalytic Applications)
TiO2 thin films, modified by acetylacetone (AcacH) in solution, were deposited on glass substrate by ultrasonic spray pyrolysis and tested for photocatalytic activity in a multi-section continuous flow reactor by degradation of acetone and acetaldehyde under ultraviolet and visible light. The increase in molar ratio of AcacH in respect of titanium (IV) isopropoxide (TTIP) from 1:5 to 1:8 modified the electronic structure of the films, favoring enhanced photocatalytic activity. The photocatalytic activity was enhanced approximately twofold on the film with molar ratio 1:8 under both irradiations; the film completely oxidized 10 ppm of acetone and acetaldehyde. The photocatalytic efficacy of TiO2 films in oxidation of air pollutants was three times higher compared to the industrial glass Pilkington ActivTM. Moreover, all the synthesized films indicate antibacterial efficiency against E. coli of over 99% under ultraviolet. TiO2 film, with TTIP:AcacH molar ratio 1:8 having great possibility for its commercial use as a material for indoor air purification. View Full-Text
Keywords: TiO2 thin film; spray pyrolysis; indoor air purification; VOC elimination; antimicrobial activity TiO2 thin film; spray pyrolysis; indoor air purification; VOC elimination; antimicrobial activity
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MDPI and ACS Style

Spiridonova, J.; Mere, A.; Krunks, M.; Rosenberg, M.; Kahru, A.; Danilson, M.; Krichevskaya, M.; Oja Acik, I. Enhanced Visible and Ultraviolet Light-Induced Gas-Phase Photocatalytic Activity of TiO2 Thin Films Modified by Increased Amount of Acetylacetone in Precursor Solution for Spray Pyrolysis. Catalysts 2020, 10, 1011. https://doi.org/10.3390/catal10091011

AMA Style

Spiridonova J, Mere A, Krunks M, Rosenberg M, Kahru A, Danilson M, Krichevskaya M, Oja Acik I. Enhanced Visible and Ultraviolet Light-Induced Gas-Phase Photocatalytic Activity of TiO2 Thin Films Modified by Increased Amount of Acetylacetone in Precursor Solution for Spray Pyrolysis. Catalysts. 2020; 10(9):1011. https://doi.org/10.3390/catal10091011

Chicago/Turabian Style

Spiridonova, Jekaterina, Arvo Mere, Malle Krunks, Merilin Rosenberg, Anne Kahru, Mati Danilson, Marina Krichevskaya, and Ilona Oja Acik. 2020. "Enhanced Visible and Ultraviolet Light-Induced Gas-Phase Photocatalytic Activity of TiO2 Thin Films Modified by Increased Amount of Acetylacetone in Precursor Solution for Spray Pyrolysis" Catalysts 10, no. 9: 1011. https://doi.org/10.3390/catal10091011

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