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Updated: May 5, 2026
Surface Properties of Synthesized Nanoporous Carbon and Silica Matrices
Published on: March 27, 2019
Inverse gas chromatography applied in the surface properties evaluation of mesocellular silica foams modified by
Linping Qian1, Ximeng Lv, Yu Ren
1Department of Chemistry, Shanghai Key Laboratory of Molecular Catalysis and Innovative Materials, Fudan University, Shanghai, 200433, PR China; State Key Laboratory of Molecular Engineering of Polymers, Department of Macromolecular Science, Fudan University, Shanghai, 200433, PR China.
Abstract:
The mesocellular silica foams (MCF) modified by different sized Ni nanoparticles (≤27.4nm) were prepared through the wetness impregnation of low metal content (0.5-2.0wt%). The technology of inverse gas chromatography (IGC) was used to evaluate the size effect of Ni nanoparticles on the surface property of Ni/MCF and the probes of four n-alkanes (C6-C9), cyclohexane, benzene, toluene, trichloroethylene, and tetrachloroethylene were tested in the 463.2-493.2K temperature range. High free energy of adsorption and enthalpy of adsorption for the aromatic hydrocarbons were found over 1.0wt% Ni/MCF with small nanoparticles of ca. 5nm. The dispersive interaction parameter γS(D), and specific interaction parameter I(sp) increase with Ni nanoparticle size decreasing over Ni/MCF. The results indicate that Ni species highly dispersed on MCF support significantly promote the surface property of the specific interaction with the aromatic structure.
