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Received April 2, 2018
Accepted July 18, 2018
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Template-free preparation of TiO2 microspheres for the photocatalytic degradation of organic dyes
Mouza Al Ruqaishy
Faisal Al Marzouqi
Kezhen Qi1
Shu-yuan Liu2
Sreejith Karthikeyan3
Younghun Kim4
Salma Mohamed Zahran Al-Kindy
Alex Tawanda Kuvarega5
Rengaraj Selvaraj†
Department of Chemistry, College of Science, Sultan Qaboos University, Muscat, Sultanate of Oman 1Institute of Catalysis for Energy and Environment, College of Chemistry and Chemical Engineering, Shenyang Normal University, Shenyang, 110034, China 2Department of Pharmacology, Shenyang Medical College, Shenyang City, Liaoning Province 110034, China 3Department of Physics and Nanotechnology, SRM Research Institute, SRM University, Kattankulathur, Tamil Nadu - 603 203, India 4Department of Chemical Engineering, Kwangwoon University, 20 Kwangwoon-ro, Nowon-gu, Seoul 01897, Korea 5Nanotechnology and Water Sustainability Research Unit, College of Science, Engineering and Technology, University of South Africa, Florida Science Campus, Johannesburg, South Africa
rengaraj@squ.edu.om
Korean Journal of Chemical Engineering, November 2018, 35(11), 2283-2289(7), 10.1007/s11814-018-0122-9
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Abstract
TiO2 microspheres were successfully synthesised by simple solution phase method by using various amount of titanium butoxide as precursor. The prepared TiO2 were characterized by X-ray diffraction (XRD), UV-vis diffuse reflectance absorption spectra (UV-DRS), X-ray photoelectron spectroscopy (XPS) and scanning electron microscopy (SEM). XRD analysis revealed that the as-synthesized TiO2 microsphere poses an anatase phase. The photocatalytic degradation experiments were carried out with three different dyes, such as methylene blue, brilliant black, reactive red-120 for four hours under UV light irradiation. The results show that TiO2 morphology had great influence on photocatalytic degradation of organic dyes. The experimental results of dye mineralization indicated the concentration was reduced by a high portion of up to 99% within 4 hours. On the basis of various characterization of the photocatalysts, the reactions involved to explain the photocatalytic activity enhancement due to the concentration of titanium butoxide and morphology include a better separation of photogenerated charge carriers and improved oxygen reduction inducing a higher extent of degradation of aromatics.
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Sharif SH, Aldo AR, Ind. Eng. Chem. Res., 47, 6598 (2008)
