Visible light-sensitive MnO2- and CeO2-loaded ZrO2/carbon cluster/Pt nanocomposite materials |
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| Authors: | H Matsui M Ikegami S Karuppuchamy MA Hassan M Yoshihara |
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| Institution: | 1. Department of Applied Chemistry, Faculty of Science and Engineering, Kinki University, 3-4-1, Kowakae, Higashiosaka, Osaka 577-8502, Japan;2. Institute of Bioscience, Universiti Putra Malaysia, 43400 Serdang, Selangor, Malaysia |
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| Abstract: | Nano-sized ZrO2/carbon cluster composite materials (Ic’s) were successfully prepared by the calcination of ZrOCl2/starch complex I. Ic’s were found to reduce methylene blue under the irradiation of visible light (λ > 460 nm). The materials obtained by calcining at 400 and 500 °C were selectively loaded with Pt particles to obtain Pt-loaded ZrO2/carbon cluster composite materials denoted as Ic400Pt and Ic500Pt, respectively. In addition, the resultant materials were modified with MnO2 and CeO2 particles to achieve MnO2- and CeO2-loaded ZrO2/carbon cluster/Pt composite materials denoted as Ic400PtMn, Ic500PtMn, Ic400PtCe and Ic500PtCe, respectively. The metal oxides-loaded ZrO2/carbon cluster/Pt composite materials thus synthesized could decompose an aqueous silver nitrate solution by visible light irradiation to give Ag and O2 with the Ag]/O2] ratios of ca. 4. Visible light-irradiated water splitting examinations with Ic400PtMn and Ic400PtCe were also investigated and found to yield H2 and O2 with the H2]/O2] ratios of ca. 2. |
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| Keywords: | Carbon cluster Metal oxide Nanocomposite Sensitization Photocatalytic activity |
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