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Relationship between Synthesis Conditions and Photocatalytic Activity of Nanocrystalline TiO2
Joint Authors
Han, Yosep
Kim, Hyung-Seok
Kim, Hyunjung
Source
Issue
Vol. 2012, Issue 2012 (31 Dec. 2012), pp.1-10, 10 p.
Publisher
Hindawi Publishing Corporation
Publication Date
2012-07-24
Country of Publication
Egypt
No. of Pages
10
Main Subjects
Abstract EN
The degradation efficiency of methylene blue by TiO2 nanoparticles, which were synthesized under different synthesis conditions (i.e., molar ratio of water and titanium tetraisopropoxide (TTIP), pH, and calcination temperature) in a sol-gel process, was systematically investigated.
The results showed that increasing the molar ratio of water and TTIP led to the enhanced photocatalytic activity of TiO2 nanoparticles, which were likely attributed to the increased specific surface area of TiO2 nanoparticles synthesized with high molar ratio.
The results were supported by the relative increase in the size of interaggregated pores of the aggregated TiO2 nanoparticles.
The best photocatalytic activity of TiO2 nanoparticles was observed at acidic synthesis conditions; however, the results were not consistent with physical properties for the crystallinity and the crystallite size of TiO2 nanoparticles but rather explained by the presence of abundant hydroxyl groups and water molecules existing on the surface of TiO2 under acidic synthesis environments.
Furthermore, methylene blue degradation experiments revealed that the photocatalytic activity of TiO2 nanoparticles was maximized at the calcination temperature of 700°C.
The trend was likely due to the combined effect of the anatase crystallinity which showed the highest value at 700°C and the crystallite size/specific surface area which did not excessively increase up to 700°C.
American Psychological Association (APA)
Han, Yosep& Kim, Hyung-Seok& Kim, Hyunjung. 2012. Relationship between Synthesis Conditions and Photocatalytic Activity of Nanocrystalline TiO2. Journal of Nanomaterials،Vol. 2012, no. 2012, pp.1-10.
https://search.emarefa.net/detail/BIM-997685
Modern Language Association (MLA)
Han, Yosep…[et al.]. Relationship between Synthesis Conditions and Photocatalytic Activity of Nanocrystalline TiO2. Journal of Nanomaterials No. 2012 (2012), pp.1-10.
https://search.emarefa.net/detail/BIM-997685
American Medical Association (AMA)
Han, Yosep& Kim, Hyung-Seok& Kim, Hyunjung. Relationship between Synthesis Conditions and Photocatalytic Activity of Nanocrystalline TiO2. Journal of Nanomaterials. 2012. Vol. 2012, no. 2012, pp.1-10.
https://search.emarefa.net/detail/BIM-997685
Data Type
Journal Articles
Language
English
Notes
Includes bibliographical references
Record ID
BIM-997685