Influence of Hydrolysis Rate on Properties of Nanosized TiO2 Synthesized via Sol-Gel Hydrothermal

Robabeh Bashiri; Norani Muti Mohamed; Chong Fai Kait; Suriati Sufian

doi:10.4028/www.scientific.net/AMR.1109.286

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HomeAdvanced Materials ResearchAdvanced Materials Research Vol. 1109Influence of Hydrolysis Rate on Properties of...

Influence of Hydrolysis Rate on Properties of Nanosized TiO₂ Synthesized via Sol-Gel Hydrothermal

Abstract:

This paper presents the effect of different H₂O: TTIP (Titanium tetraisopropoxide) molar ratios of 8 to 64 during the synthesis using sol-gel associated hydrothermal method on the physical properties. Characterization of all synthesized TiO₂were accomplished by X-ray diffraction (XRD), Brunauer–Emmett–Teller (BET) and total surface area measurement, transmission electron microscopy analysis (TEM) and diffuse reflectance UV–Vis spectroscopy (DR-UV-Vis). The XRD analysis showed that anatase (101) was the major phase for all photocatalysts as verified by TEM results. The growth of crystallites with sizes ranging between 10 to 12 nm can be controlled by adjusting the H₂O: TTIP molar ratios. Furthermore, no phase transformation from anatase to rutile observed by increasing the H₂O: TTIP molar ratio. BET data displayed that all prepared photocatalysts are mesoporous materials with type IV adsorption behaviour. DR-UV-Vis spectroscopy revealed that the hydrolysis rate does not give any significant changes on the band gap energies. Among different photocatalysts, the prepared photocatalyst with the H₂O: TTIP molar ratio 32 had the smallest crystal size, particle size, and the highest surface area which are suitable for better photocatalytic performance.

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Periodical:

Advanced Materials Research (Volume 1109)

Pages:

286-290

DOI:

https://doi.org/10.4028/www.scientific.net/AMR.1109.286

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Online since:

June 2015

Authors:

Robabeh Bashiri*, Norani Muti Mohamed, Chong Fai Kait, Suriati Sufian

Keywords:

Hydrolysis, Photocatalyst, Sol-Gel Hydrothermal, TiO₂

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