Photocatalytic decomposition of acetaldehyde gas on TiO2-SiO2 thin film photocatalyst ― a kinetic analysis
TiO2-SiO2 thin film photocatalysts with 5 (TF95/5) and 10 w/w% (TF90/10) SiO2 contents have been prepared via sol-gel method. Characterization using X-ray diffractormeter and field emission scanning electron microscopy is performed to investigate the effect of SiO2 doping on the TiO2 thin film’s phy...
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| Format: | Article |
| Language: | English |
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National Institute of Science Communication and Information Resources (CSIR)
2013
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| Online Access: | http://irep.iium.edu.my/29952/ http://irep.iium.edu.my/29952/1/IJCT_20%282%29_137-144.pdf |
| _version_ | 1848780214365061120 |
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| author | Abdul Aziz , Radhiyah Sopyan, Iis |
| author_facet | Abdul Aziz , Radhiyah Sopyan, Iis |
| author_sort | Abdul Aziz , Radhiyah |
| building | IIUM Repository |
| collection | Online Access |
| description | TiO2-SiO2 thin film photocatalysts with 5 (TF95/5) and 10 w/w% (TF90/10) SiO2 contents have been prepared via sol-gel method. Characterization using X-ray diffractormeter and field emission scanning electron microscopy is performed to investigate the effect of SiO2 doping on the TiO2 thin film’s physico-chemical properties. The photocatalytic performance of the thin films is evaluated using the degradation of acetaldehyde gas at various initial concentrations under fixed intensity UV irradiation. A Langmuir-Hinshelwood kinetic model is used to analyze the kinetics of the photocatalytic reaction. It is found that the first order reaction rate constant (k) of the TF95/5 thin film photocatalyst (1.2438 µmol dm-3 min-1) is higher than that of TF90/10 thin film (0.3648 µmol dm-3 min-1). This is attributed to higher crystallinity of the TF95/5 thin film, resulting in more active charge carrier generation. However, TF90/10 thin film photocatalyst with smaller TiO2 particles shows four times stronger adsorbability of acetaldehyde than TF95/5 due to its higher surface area. |
| first_indexed | 2025-11-14T15:30:07Z |
| format | Article |
| id | iium-29952 |
| institution | International Islamic University Malaysia |
| institution_category | Local University |
| language | English |
| last_indexed | 2025-11-14T15:30:07Z |
| publishDate | 2013 |
| publisher | National Institute of Science Communication and Information Resources (CSIR) |
| recordtype | eprints |
| repository_type | Digital Repository |
| spelling | iium-299522016-12-08T01:40:45Z http://irep.iium.edu.my/29952/ Photocatalytic decomposition of acetaldehyde gas on TiO2-SiO2 thin film photocatalyst ― a kinetic analysis Abdul Aziz , Radhiyah Sopyan, Iis TP1080 Polymers, plastics and their manufacture TP155 Chemical engineering TiO2-SiO2 thin film photocatalysts with 5 (TF95/5) and 10 w/w% (TF90/10) SiO2 contents have been prepared via sol-gel method. Characterization using X-ray diffractormeter and field emission scanning electron microscopy is performed to investigate the effect of SiO2 doping on the TiO2 thin film’s physico-chemical properties. The photocatalytic performance of the thin films is evaluated using the degradation of acetaldehyde gas at various initial concentrations under fixed intensity UV irradiation. A Langmuir-Hinshelwood kinetic model is used to analyze the kinetics of the photocatalytic reaction. It is found that the first order reaction rate constant (k) of the TF95/5 thin film photocatalyst (1.2438 µmol dm-3 min-1) is higher than that of TF90/10 thin film (0.3648 µmol dm-3 min-1). This is attributed to higher crystallinity of the TF95/5 thin film, resulting in more active charge carrier generation. However, TF90/10 thin film photocatalyst with smaller TiO2 particles shows four times stronger adsorbability of acetaldehyde than TF95/5 due to its higher surface area. National Institute of Science Communication and Information Resources (CSIR) 2013-03 Article PeerReviewed application/pdf en http://irep.iium.edu.my/29952/1/IJCT_20%282%29_137-144.pdf Abdul Aziz , Radhiyah and Sopyan, Iis (2013) Photocatalytic decomposition of acetaldehyde gas on TiO2-SiO2 thin film photocatalyst ― a kinetic analysis. Indian Journal of Chemical Technology, 20 (2). pp. 137-144. ISSN 0975-0991 E-ISSN 0971-457X http://www.niscair.res.in/sciencecommunication/ResearchJournals/rejour/ijct/ijct0.asp |
| spellingShingle | TP1080 Polymers, plastics and their manufacture TP155 Chemical engineering Abdul Aziz , Radhiyah Sopyan, Iis Photocatalytic decomposition of acetaldehyde gas on TiO2-SiO2 thin film photocatalyst ― a kinetic analysis |
| title | Photocatalytic decomposition of acetaldehyde gas on TiO2-SiO2 thin film photocatalyst ― a kinetic analysis |
| title_full | Photocatalytic decomposition of acetaldehyde gas on TiO2-SiO2 thin film photocatalyst ― a kinetic analysis |
| title_fullStr | Photocatalytic decomposition of acetaldehyde gas on TiO2-SiO2 thin film photocatalyst ― a kinetic analysis |
| title_full_unstemmed | Photocatalytic decomposition of acetaldehyde gas on TiO2-SiO2 thin film photocatalyst ― a kinetic analysis |
| title_short | Photocatalytic decomposition of acetaldehyde gas on TiO2-SiO2 thin film photocatalyst ― a kinetic analysis |
| title_sort | photocatalytic decomposition of acetaldehyde gas on tio2-sio2 thin film photocatalyst ― a kinetic analysis |
| topic | TP1080 Polymers, plastics and their manufacture TP155 Chemical engineering |
| url | http://irep.iium.edu.my/29952/ http://irep.iium.edu.my/29952/ http://irep.iium.edu.my/29952/1/IJCT_20%282%29_137-144.pdf |