High activity of Ag-doped Cd0.1Zn0.9S photocatalyst prepared by the hydrothermal method for hydrogen production under visible-light irradiation

Leny, Yuliati and Melody, Kimi and Mustaffa, Shamsuddin (2014) High activity of Ag-doped Cd0.1Zn0.9S photocatalyst prepared by the hydrothermal method for hydrogen production under visible-light irradiation. Beilstein Journal of Nanotechnology, 5. pp. 587-595. ISSN 2190-4286

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Abstract

Background: The hydrothermal method was used as a new approach to prepare a series of Ag-doped Cd0.1Zn0.9S photocatalysts. The effect of Ag doping on the properties and photocatalytic activity of Cd0.1Zn0.9S was studied for the hydrogen production fromwater reduction under visible light irradiation. Results: Compared to the series prepared by the co-precipitation method, samples prepared by the hydrothermal method performed with a better photocatalytic activity. The sample with the optimum amount of Ag doping showed the highest hydrogen production rate of 3.91 mmol/h, which was 1.7 times higher than that of undoped Cd0.1Zn0.9S. With the Ag doping, a red shift in the optical response was observed, leading to a larger portion of the visible light absorption than that of without doping. In addition to the larger absorption in the visible-light region, the increase in photocatalytic activity of samples with Ag doping may also come from the Ag species facilitating electron–hole separation. Conclusion: This study demonstrated that Ag doping is a promising way to enhance the activity of Cd0.1Zn0.9S photocatalyst.

Item Type: Article
Uncontrolled Keywords: Ag doping, Cd0.1Zn0.9S, hydrogen production, hydrothermal, visible light, research, Universiti Malaysia Sarawak, unimas, university, universiti, Borneo, Malaysia, Sarawak, Kuching, Samarahan, ipta, education, undergraduate, postgraduate,
Subjects: Q Science > QD Chemistry
Divisions: Academic Faculties, Institutes and Centres > Centre for Pre-University Studies
Depositing User: Farah Liyana bt Azizan
Date Deposited: 14 Apr 2015 08:17
Last Modified: 10 Sep 2015 03:37
URI: http://ir.unimas.my/id/eprint/7012

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