Enhanced Visible and Ultraviolet Light-Induced Gas-Phase Photocatalytic Activity of TiO<sub>2</sub> Thin Films Modified by Increased Amount of Acetylacetone in Precursor Solution for Spray Pyrolysis
TiO<sub>2</sub> 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 vi...
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MDPI AG
2020-09-01
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| Online Access: | https://www.mdpi.com/2073-4344/10/9/1011 |
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| author | Jekaterina Spiridonova Arvo Mere Malle Krunks Merilin Rosenberg Anne Kahru Mati Danilson Marina Krichevskaya Ilona Oja Acik |
| author_facet | Jekaterina Spiridonova Arvo Mere Malle Krunks Merilin Rosenberg Anne Kahru Mati Danilson Marina Krichevskaya Ilona Oja Acik |
| author_sort | Jekaterina Spiridonova |
| collection | DOAJ |
| description | TiO<sub>2</sub> 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 TiO<sub>2</sub> films in oxidation of air pollutants was three times higher compared to the industrial glass Pilkington Activ<sup>TM</sup>. Moreover, all the synthesized films indicate antibacterial efficiency against <i>E. coli</i> of over 99% under ultraviolet. TiO<sub>2</sub> film, with TTIP:AcacH molar ratio 1:8 having great possibility for its commercial use as a material for indoor air purification. |
| first_indexed | 2024-03-10T16:35:35Z |
| format | Article |
| id | doaj.art-255cef8e467446909a2da7c08a9fc7fb |
| institution | Directory Open Access Journal |
| issn | 2073-4344 |
| language | English |
| last_indexed | 2024-03-10T16:35:35Z |
| publishDate | 2020-09-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Catalysts |
| spelling | doaj.art-255cef8e467446909a2da7c08a9fc7fb2023-11-20T12:26:01ZengMDPI AGCatalysts2073-43442020-09-01109101110.3390/catal10091011Enhanced Visible and Ultraviolet Light-Induced Gas-Phase Photocatalytic Activity of TiO<sub>2</sub> Thin Films Modified by Increased Amount of Acetylacetone in Precursor Solution for Spray PyrolysisJekaterina Spiridonova0Arvo Mere1Malle Krunks2Merilin Rosenberg3Anne Kahru4Mati Danilson5Marina Krichevskaya6Ilona Oja Acik7Laboratory of Thin Films Chemical Technologies, Department of Materials and Environmental Technology, Tallinn University of Technology, Ehitajate tee 5, 19086 Tallinn, EstoniaLaboratory of Thin Films Chemical Technologies, Department of Materials and Environmental Technology, Tallinn University of Technology, Ehitajate tee 5, 19086 Tallinn, EstoniaLaboratory of Thin Films Chemical Technologies, Department of Materials and Environmental Technology, Tallinn University of Technology, Ehitajate tee 5, 19086 Tallinn, EstoniaLaboratory of Environmental Toxicology, National Institute of Chemical Physics and Biophysics, Akadeemia tee 23, 12618 Tallinn, EstoniaLaboratory of Environmental Toxicology, National Institute of Chemical Physics and Biophysics, Akadeemia tee 23, 12618 Tallinn, EstoniaLaboratory of Optoelectronic Materials Physics, Department of Materials and Environmental Technology, Tallinn University of Technology, Ehitajate tee 5, 19086 Tallinn, EstoniaLaboratory of Environmental Technology, Department of Materials and Environmental Technology, Tallinn University of Technology, Ehitajate tee 5, 19086 Tallinn, EstoniaLaboratory of Thin Films Chemical Technologies, Department of Materials and Environmental Technology, Tallinn University of Technology, Ehitajate tee 5, 19086 Tallinn, EstoniaTiO<sub>2</sub> 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 TiO<sub>2</sub> films in oxidation of air pollutants was three times higher compared to the industrial glass Pilkington Activ<sup>TM</sup>. Moreover, all the synthesized films indicate antibacterial efficiency against <i>E. coli</i> of over 99% under ultraviolet. TiO<sub>2</sub> film, with TTIP:AcacH molar ratio 1:8 having great possibility for its commercial use as a material for indoor air purification.https://www.mdpi.com/2073-4344/10/9/1011TiO<sub>2</sub> thin filmspray pyrolysisindoor air purificationVOC eliminationantimicrobial activity |
| spellingShingle | Jekaterina Spiridonova Arvo Mere Malle Krunks Merilin Rosenberg Anne Kahru Mati Danilson Marina Krichevskaya Ilona Oja Acik Enhanced Visible and Ultraviolet Light-Induced Gas-Phase Photocatalytic Activity of TiO<sub>2</sub> Thin Films Modified by Increased Amount of Acetylacetone in Precursor Solution for Spray Pyrolysis Catalysts TiO<sub>2</sub> thin film spray pyrolysis indoor air purification VOC elimination antimicrobial activity |
| title | Enhanced Visible and Ultraviolet Light-Induced Gas-Phase Photocatalytic Activity of TiO<sub>2</sub> Thin Films Modified by Increased Amount of Acetylacetone in Precursor Solution for Spray Pyrolysis |
| title_full | Enhanced Visible and Ultraviolet Light-Induced Gas-Phase Photocatalytic Activity of TiO<sub>2</sub> Thin Films Modified by Increased Amount of Acetylacetone in Precursor Solution for Spray Pyrolysis |
| title_fullStr | Enhanced Visible and Ultraviolet Light-Induced Gas-Phase Photocatalytic Activity of TiO<sub>2</sub> Thin Films Modified by Increased Amount of Acetylacetone in Precursor Solution for Spray Pyrolysis |
| title_full_unstemmed | Enhanced Visible and Ultraviolet Light-Induced Gas-Phase Photocatalytic Activity of TiO<sub>2</sub> Thin Films Modified by Increased Amount of Acetylacetone in Precursor Solution for Spray Pyrolysis |
| title_short | Enhanced Visible and Ultraviolet Light-Induced Gas-Phase Photocatalytic Activity of TiO<sub>2</sub> Thin Films Modified by Increased Amount of Acetylacetone in Precursor Solution for Spray Pyrolysis |
| title_sort | enhanced visible and ultraviolet light induced gas phase photocatalytic activity of tio sub 2 sub thin films modified by increased amount of acetylacetone in precursor solution for spray pyrolysis |
| topic | TiO<sub>2</sub> thin film spray pyrolysis indoor air purification VOC elimination antimicrobial activity |
| url | https://www.mdpi.com/2073-4344/10/9/1011 |
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