Effect of calcination atmosphere on the structure and photocatalytic properties of titania mesoporous powder

Samiee, L., Beitollahi, A. and Vinu, A. (2012) Effect of calcination atmosphere on the structure and photocatalytic properties of titania mesoporous powder. Research on Chemical Intermediates, 38 7: 1467-1482. doi:10.1007/s11164-011-0477-6


Author Samiee, L.
Beitollahi, A.
Vinu, A.
Total Author Count Override 3
Title Effect of calcination atmosphere on the structure and photocatalytic properties of titania mesoporous powder
Journal name Research on Chemical Intermediates   Check publisher's open access policy
ISSN 0922-6168
1568-5675
Publication date 2012-09
Sub-type Critical review of research, literature review, critical commentary
DOI 10.1007/s11164-011-0477-6
Volume 38
Issue 7
Start page 1467
End page 1482
Total pages 16
Place of publication Dordrecht, Netherlands
Publisher Springer
Collection year 2013
Language eng
Formatted abstract
In the work presented here, mesoporous titania (MTO) powders are synthesised by the sol-gel method using amphiphilic triblock copolymer as a template in two different calcination atmospheres, N 2 and air. Various techniques such as sequential thermal analysis (STA), small-angle X-ray diffraction (SAXRD), wide-angle X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS), ultraviolet (UV)-visible spectroscopy, high-resolution transmission electron microscopy (HRTEM) and N 2-adsorption/desorption analysis were utilised to study the prepared samples. Furthermore, the photocatalytic activities of the prepared samples were evaluated from the photo-degradation analysis of methylene blue (MB). For the sample calcined at N 2, the formation of an ordered mesostructure with a high specific surface area (172 m 2 g -1), mesoporosity (48%) and enhanced photocatalytic activity were obtained compared to that of the sample calcined in air. The observed increased MB degradation for the latter is mainly attributed to the formation of higher specific surface area and mesoporosity. The availability of highly ordered open-pore channels could provide increased contacts between reactants in the solution and the active sites on the surface of titania mesoporous particles. Considering the photoactivities of the samples, it is revealed that the photocatalytic activity is enhanced, together with an increase in the surface defects in N 2 atmosphere.
Keyword Titania mesoporous
Calcination atmosphere
Ti3+
Surface defect
Q-Index Code C1
Q-Index Status Confirmed Code
Institutional Status UQ
Additional Notes Published online: 17 January 2012.

Document type: Journal Article
Sub-type: Critical review of research, literature review, critical commentary
Collections: Official 2013 Collection
Australian Institute for Bioengineering and Nanotechnology Publications
 
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