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Characterization and Photocatalytic Activity of CeO2-TiO2 for Photoreduction of CO2 to Methanol under Visible Light

Hamidah, Abdullah and Syarifah, Abd Rahim and Zahira, Yaakob and Khan, Maksudur R. and Nur Aminatulmimi, Ismail (2015) Characterization and Photocatalytic Activity of CeO2-TiO2 for Photoreduction of CO2 to Methanol under Visible Light. In: 28th Symposium Of Malaysian Chemical Engineers (SOMCHE) 2015, 20-22 Oct 2015 , Putrajaya. . (Unpublished)

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Abstract

A visible light-driven photocatalyst, CeO2-TiO2 catalyst was synthesized by impregnation method between TiO2 powder and cerium oxide nanoparticles slurry. The prepared catalyst samples were characterized by X-ray diffraction (XRD), UV-vis absorption spectroscopy and photoluminescence spectroscopy (PL). The band gap of CeO2-TiO2 catalyst was found to be 2.2-2.25 eV, which is significantly lower than the TiO2 catalyst (2.7eV). The band gap reduction clearly indicated the successful loading of CeO2 on TiO2 which was further confirmed by XRD. The photocatalytic activity was determined by measuring the photoreduction of CO2 to methanol in aqueous solution under visible light. The effect of cerium loading in the range of 0 to 5 wt% on the photocatalytic activity was studied and 2 wt. % CeO2-TiO2 was found to exhibit the maximum photoactivity of 18.6 μmol/g.catalyst after 6 hours irradiation. Results showed that the prepared photocatalyst is visible light active and may be used as effective catalyst in photoreduction of CO2 to methanol.

Item Type: Conference or Workshop Item (Speech)
Uncontrolled Keywords: metal oxide;photocatalyst;band gap;nanoparticles
Subjects: T Technology > TP Chemical technology
Faculty/Division: Faculty of Chemical & Natural Resources Engineering
Depositing User: Mrs. Neng Sury Sulaiman
Date Deposited: 22 Oct 2015 02:07
Last Modified: 27 Mar 2018 04:21
URI: http://umpir.ump.edu.my/id/eprint/10511
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