Preparation of Fe3+-doped TiO2 catalysts by controlled hydrolysis of titanium alkoxide and study on their photocatalytic activity for methyl orange degradation

Journal of Hazardous Materials
Tianzhong TongDannong He

Abstract

Fe3+-doped TiO2 (Fe-TiO2) porous microspheres were prepared by controlled hydrolysis of Ti(OC4H9)4 with water generated "in situ" via an esterification reaction between acetic acid and ethanol, followed by hydrothermal treatment. The samples were characterized by X-ray diffraction (XRD), transmission electron microscopy (TEM), atomic absorption flame emission spectroscopy (AAS), electron paramagnetic resonance (EPR) spectrum, X-ray photoelectron spectroscopy (XPS), UV-vis diffuse reflectance spectroscopy (DRS), and nitrogen adsorption-desorption methods. All of the undoped TiO2 and Fe-TiO2 samples exclusively consist of primary anatase crystallites, which further form porous microspheres with diameters ranging from 150 to 500 nm. The photocatalytic activity of Fe-TiO2 catalysts was evaluated from the photodegradation of methyl orange (MO) aqueous solution both under UV and visible light irradiation. Fe3+ doping effectively improves the photocatalytic activity under both UV light irradiation and visible light irradiation with an optimal doping concentration of 0.1 and 0.2%, respectively. The photocatalytic mechanisms of Fe-TiO2 catalysts were tentatively discussed.

References

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Citations

Mar 7, 2014·Journal of Environmental Health Science & Engineering·Mansooreh DehghaniAmir Anushiravani
Jan 8, 2014·Journal of Environmental Health Science & Engineering·Mojtaba SafariReza Aminzadeh
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Aug 26, 2016·Environmental Science and Pollution Research International·Justin Chun-Te LinMing-Chun Lu
Mar 11, 2016·Chemical Society Reviews·Xin LiMietek Jaroniec
Jun 8, 2018·Dalton Transactions : an International Journal of Inorganic Chemistry·Zhongfu LiShiying Zhang
Nov 17, 2010·Science and Technology of Advanced Materials·Mathieu Grandcolas, Jinhua Ye
Sep 9, 2018·Journal of Molecular Modeling·Julio César González-TorresOscar Olvera-Neria
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Nov 28, 2012·Chemistry of Materials : a Publication of the American Chemical Society·Sergio SandovalWilliam C Trogler

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