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Selective Adsorption of Glucose-Derived Carbon Precursor on Amino-Functionalized Porous Silica for Fabrication of Hollow Carbon Spheres with Porous Walls
Chemistry of Materials (2007)
  • Shigeru Ikeda
  • Koji Tachi
  • Yun Hau Ng
  • Yoshimitsu Ikoma
  • Takao Sakata
  • Hirotaro Mori
  • Takahashi Harada
  • Michio Matsumura
Abstract

Coating of polysuccharide (PS) generated by hydrothermal treatment of glucose on Sto¨ber’s silica particles was examined. Uniform surface coverage of PS was achieved when the silica particles, the surfaces of which had been modified with amino groups, were mixed during the hydrothermal reaction of glucose. On the other hand, bare silica could not be coated with PS upon addition to the hydrothermal reaction solution; instead, this produced spherical PS particles with diameters of a few tens of nanometers beside silica particles. The significant effect of surface amino-functionalization of silica particles on the coverage of PS is attributable to induction of an electrostatic attraction between the positively charged amino-functionalized silica surface and negatively charged PS. When silica (core)-porous silica(shell) spheres were used instead of Sto¨ber’s silica, efficient filling of the pores of the silica shell with PS could also be achieved by amino-functionalization of the surface of the porous silica shell. The silica (core)- PS (shell) materials as-obtained were converted into isolated hollow carbon spheres with well-developed porous shell structures by heat treatment under a vacuum followed by treatment with aqueous hydrofluoric acid.

Keywords
  • Hollow Carbon
Publication Date
August, 2007
Citation Information
Shigeru Ikeda, Koji Tachi, Yun Hau Ng, Yoshimitsu Ikoma, et al.. "Selective Adsorption of Glucose-Derived Carbon Precursor on Amino-Functionalized Porous Silica for Fabrication of Hollow Carbon Spheres with Porous Walls" Chemistry of Materials Vol. 19 Iss. 17 (2007)
Available at: http://works.bepress.com/yunhau_ng/13/