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Photocatalytic Route for Synthesis of Hollow Porous Carbon/Pt Nanocomposites with Controllable Density and Porosity
Chemistry of Materials (2008)
  • Yun Hau Ng
  • Shigeru Ikeda
  • Takashi Harada
  • Sangin Park
  • Takao Sakata
  • Hirotaro Mori
  • Michio Matsumura
Abstract

Simultaneous photoreduction of Pt(IV) ions and photooxidative polymerization of phenol on the surface of titanium(IV) oxide (TiO2) under ultraviolet light irradiation induced the formation of a composite, Pt-loaded TiO2 covered with a layer of phenolic polymer. Subsequent carbonization of the polymer layer and removal of TiO2 core particles yielded hollow carbon incorporated with platinum nanoparticles (nPt@hC). By varying the photoirradiation time, appreciable changes in density and porosity of the polymer layer and the carbon shell in nPt@hC were observed: prolonged irradiation induced a densification of the carbon matrix, resulting in a decrease in pore volume. Mainly due to the modulation of active surface of Pt nanoparticles, the densification of carbon was found to influence catalytic activity for hydrogenation of normal olefins.

Publication Date
February, 2008
Citation Information
Yun Hau Ng, Shigeru Ikeda, Takashi Harada, Sangin Park, et al.. "Photocatalytic Route for Synthesis of Hollow Porous Carbon/Pt Nanocomposites with Controllable Density and Porosity" Chemistry of Materials Vol. 20 Iss. 3 (2008)
Available at: http://works.bepress.com/yunhau_ng/14/