Copper-Zinc-Titania Nanocomposite as Catalyst for CO₂ Photo-Reduction: A Surface Deactivation Study

Abstract:

In this paper, a surface deactivation study of Cu_1.0-Zn_0.5-Ti_98.5 oxide nanocomposite (CZT-ONC) as catalyst for photo-reduction of CO₂ in aqueous solution is reported. The photo-reduction experiments were conducted through five experimental cycles. The results demonstrated that the activity of the CZT-ONC decreased by increasing the number of testing cycle. The causes for declining the activity of the CZT-ONC catalyst was studied by investigating the surface condition of the catalyst before and after used by mean X-ray photoelectron spectroscopy (XPS) and field emission-scanning electron spectroscopy (FE-SEM) techniques and the results are discussed. It was found that the surface conditions (chemical state of the elements and morphology) of the CZT-ONC catalyst have been critically altered. Change in surface condition pointed that the deactivation process on the surface of the CZT-ONC was occurred and it could be considered to be the reasons for declining of the activity.

• Periodical: Advanced Materials Research (Volume 896)
• Pages: 134-140
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.896.134
• Online since: February 2014
• Authors: Oman Zuas, Yuni Krisyuningsih Krisnandi, Widayanti Wibowo, Jin Seog Kim, Jarnuzi Gunlazuardi*
• Keywords: Carbon Dioxide, Composite, Copper-Zinc-Titania, Nanostructure, Photocatalytic

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