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Synthesis of carbon self-doped titanium dioxide and its activity in the photocatalytic oxidation of styrene under visible light irradiation

Alias, Siti Hajar and Mohamed, Nurul Najidah and Leaw, Wai Loon and Chandren, Sheela (2019) Synthesis of carbon self-doped titanium dioxide and its activity in the photocatalytic oxidation of styrene under visible light irradiation. Malaysian Journal of Fundamental and Applied Sciences, 15 (2). pp. 291-297. ISSN 2289-5981

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Official URL: https://dx.doi.org/10.11113/mjfas.v15n2.1592

Abstract

Carbon self-doped titanium dioxide (C/TiO2) photocatalyst was synthesized by a simple sol-gel method using titanium isopropoxide as both the titanium precursor and carbon source. The effects of calcination temperatures in the range of 300 to 700 °C to the structure and physicochemical properties of the C/TiO2 were investigated by X-ray diffraction (XRD), field emission scanning electron microscopy (FESEM) coupled with energy dispersive X-ray (EDX), Fourier transform infrared (FTIR) spectroscopy, UV-visible diffuse reflectance (UV-Vis DR) spectroscopy, photoluminescence spectroscopy, N2 adsorption-desorption and X-ray photoelectron spectroscopy (XPS). XPS results proved the presence of self-doped carbon at the interstitial and substitutional lattice of TiO2. The C/TiO2 calcined at 300 and 400 °C (C/TiO2-300 and C/TiO2-400, respectively) showed mesoporous characteristic and large surface area of about 100 m2 g-1. The C/TiO2 photocatalysts were then tested in the photo-oxidation of styrene under visible light irradiation with aqueous hydrogen peroxide as the oxidizing agent. The C/TiO2 photocatalysts were successfully activated under the irradiation of visible light, where C/TiO2-300 and C/TiO2-400 showed the highest total concentration of products (benzaldehyde and styrene oxide) at 1.1 mmol and 1.0 mmol, respectively.

Item Type:Article
Uncontrolled Keywords:Titanium dioxide, carbon doped, photocatalytic activity, styrene, photo-oxidation
Subjects:Q Science > QC Physics
Divisions:Science
ID Code:84976
Deposited By: Fazli Masari
Deposited On:29 Feb 2020 13:49
Last Modified:29 Feb 2020 13:49

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