The influence of calcination temperature on (photo)electrochemical property of TiO2prepared by the sol-gel method

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Author list: Poo-Arporn Y., Luengprasert K., Tonlublao S., Loiha S., Ruangvittayanon A., Poo-Arporn R.P.

Publisher: IOP Publishing Ltd

Publication year: 2020

Title of series: IOP Conf. Series: Materials Science and Engineering

Volume number: 965

Issue number: 1

Start page: 012005

ISSN: 17578981

URL: https://www.scopus.com/inward/record.uri?eid=2-s2.0-85099219275&doi=10.1088%2f1757-899X%2f965%2f1%2f012005&partnerID=40&md5=f37485a64a346d27a6e8f740d442b3f6

Languages: English-Great Britain (EN-GB)

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Abstract

In this work, titanium dioxide (TiO2) was successfully synthesized via the sol-gel method using Titanium (IV) isopropoxide as a precursor. The mixture was heated to 115°C to obtain the solid powder of TiO2. Ti K-edge XANES measurement was performed to determine its structure. Three pre-edge peaks at energy levels between 5460-5480 eV were clearly observed. These features correlated to 1s?d electronic transition in the distorted-octahedral structure of anatase TiO2. The in situ XANES experiment at 700°C revealed no phase transformation from anatase to rutile. There was no characteristic of the rutile phase on the XRD pattern of TiO2 calcined at 700°C. This result confirmed the stability of anatase. SEM images revealed the circular shape of TiO2 particles with a diameter of around 50 nm. The highest (photo)electrochemical activity of TiO2 was obtained at the calcination temperature of 300°C as investigated by a cyclic voltammetry. © Published under licence by IOP Publishing Ltd.

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