Uddin, M. Rahim and Khan, Maksudur R. and Rahman, M. Wasikur and Yousuf, Abu and Cheng, C. K. (2015) Photocatalytic Reduction of CO2 Into Methanol Over CuFe2O4/TiO2 under Visible Light Irradiation. Reaction Kinetics, Mechanisms and Catalysis, 116 (2). pp. 589-604. ISSN 1878-5190. (Published)
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Photocatalytic Reduction of CO2 into Methanol over CuFe2O4-TiO2 under Visible Light Irradiation.pdf Download (43kB) | Preview |
Abstract
The present study aims to focus the photocatalytic reduction of carbon dioxide (CO2) into methanol on TiO2 loaded copper ferrite (CuFe2O4) photocatalyst under visible light (500 W xenon lamp) irradiation. In this perspective, CuFe2O4 and CuFe2O4/TiO2 photocatalysts were synthesized following the sol–gel method from copper(II) nitrate, Cu(NO3)2·3H2O (99 %) and iron(III) nitrate, Fe(NO3)3·9H2O (99 %) as precursors. The phases and crystallite size of the photocatalysts were characterized by X-ray diffraction (XRD), morphology by scanning electron microscopy (SEM), absorption spectrum by ultraviolet–visible spectroscopy (UV–Vis), electron–hole (e−/h+) recombination process by photoluminescence spectrophotometer, and elemental compositions by energy dispersive X-ray spectroscopy (EDX) instruments. The loading of TiO2 on CuFe2O4 enhanced the photocatalytic activity in the visible light range. The enhanced photoactivity in CuFe2O4/TiO2 semiconductor catalyst can be attributed to interfacial transfer of photogenerated charges, which led to effective charge separation and inhibited the recombination of photogenerated electron–hole (e−/h+) pairs. Methanol was observed as the main product over CuFe2O4/TiO2 and the photocatalytic activity of CuFe2O4/TiO2 for CO2 reduction was found to be about three times higher (651 μmol/gcat L) than that of CuFe2O4 photocatalyst which might be due to the modification of band gap through TiO2 loading.
| Item Type: | Article |
|---|---|
| Uncontrolled Keywords: | CO2 reduction; Visible light irradiation; CuFe2O4/TiO2 photocatalyst; Band gap energy; Methanol |
| Subjects: | T Technology > TP Chemical technology |
| Faculty/Division: | Faculty of Chemical & Natural Resources Engineering Faculty of Engineering Technology |
| Depositing User: | Dr. MD Maksudur Rahman Khan |
| Date Deposited: | 05 Apr 2016 02:31 |
| Last Modified: | 11 Jan 2018 01:19 |
| URI: | http://umpir.ump.edu.my/id/eprint/12594 |
| Download Statistic: | View Download Statistics |
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