CeO2-TiO2 for photoreduction of CO2 to methanol under visible light: Effect of ceria loading

Hamidah Abdullah, Nur Aminatulmimi Ismail, Zahira Yaakob, Maksudur R. Khan, Syarifah Abd Rahim

Research output: Contribution to journalArticle

Abstract

A visible light-driven photocatalyst, CeO2-TiO2 catalyst with different ceria loading was synthesized by impregnation method between TiO2 powder and cerium oxide nanoparticles slurry. The prepared catalyst samples were characterized by X-ray diffraction (XRD), surface area analysis, UV-vis absorption spectroscopy and photoluminescence spectroscopy (PL). The band gap of CeO2-TiO2 catalyst was found to be 2.15-2.4 eV. The band gap reduction clearly indicated the successful loading of CeO2 on TiO2. 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 1 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.

Translated title of the contributionCeO2-TiO2 for photoreduction of CO2 to methanol under visible light : Effect of ceria loading
LanguageMalay
Pages166-172
Number of pages7
JournalMalaysian Journal of Analytical Sciences
Volume21
Issue number1
DOIs
StatePublished - 1 Feb 2017

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Cerium compounds
Carbon Monoxide
Methanol
Catalysts
Photocatalysts
Energy gap
Cerium
Photoluminescence spectroscopy
Ultraviolet spectroscopy
Absorption spectroscopy
Impregnation
Powders
Irradiation
Nanoparticles
X ray diffraction

Keywords

    ASJC Scopus subject areas

    • Analytical Chemistry

    Cite this

    (CeO2-TiO2 untuk penurunan CO2 kepada metanol di bawah radiasi cahaya nampak : Kesan pemuatan ceria). / Abdullah, Hamidah; Ismail, Nur Aminatulmimi; Yaakob, Zahira; Khan, Maksudur R.; Rahim, Syarifah Abd.

    In: Malaysian Journal of Analytical Sciences, Vol. 21, No. 1, 01.02.2017, p. 166-172.

    Research output: Contribution to journalArticle

    Abdullah, Hamidah ; Ismail, Nur Aminatulmimi ; Yaakob, Zahira ; Khan, Maksudur R. ; Rahim, Syarifah Abd. / (CeO2-TiO2 untuk penurunan CO2 kepada metanol di bawah radiasi cahaya nampak : Kesan pemuatan ceria). In: Malaysian Journal of Analytical Sciences. 2017 ; Vol. 21, No. 1. pp. 166-172
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    abstract = "A visible light-driven photocatalyst, CeO2-TiO2 catalyst with different ceria loading was synthesized by impregnation method between TiO2 powder and cerium oxide nanoparticles slurry. The prepared catalyst samples were characterized by X-ray diffraction (XRD), surface area analysis, UV-vis absorption spectroscopy and photoluminescence spectroscopy (PL). The band gap of CeO2-TiO2 catalyst was found to be 2.15-2.4 eV. The band gap reduction clearly indicated the successful loading of CeO2 on TiO2. 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 1 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.",
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