title: Inverse gas chromatography applied in the surface properties evaluation of mesocellular silica foams modified by sized nickel nanoparticles.
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.
authors.affiliation: Department 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. Electronic address: lpqian@fudan.edu.cn.
authors.forename: Linping
authors.initials: L
authors.lastname: Qian
authors.forename: Ximeng
authors.initials: X
authors.lastname: Lv
authors.forename: Yu
authors.initials: Y
authors.lastname: Ren
authors.forename: Haitao
authors.initials: H
authors.lastname: Wang
authors.forename: Guoping
authors.initials: G
authors.lastname: Chen
authors.forename: Yuanli
authors.initials: Y
authors.lastname: Wang
authors.forename: Jianzhong
authors.initials: J
authors.lastname: Shen
mesh_terms: D002384:Catalysis; D002849:Chromatography, Gas / Q000379:methods*; D053768:Metal Nanoparticles / Q000737:chemistry* / Q000648:ultrastructure; D046529:Microscopy, Electron, Transmission; D009532:Nickel / Q000737:chemistry*; D012822:Silicon Dioxide / Q000737:chemistry*; D013499:Surface Properties
chemical_list: D012822:Silicon Dioxide; D009532:Nickel
keywords: Adsorption; Inverse gas chromatography; MCF; Nickel; Surface properties