Affordable Access

Publisher Website

Silica Gel Modified Due to Pyrolysis of Acetylacetone and Metal (Ti, Cr, Co, Ni, Zn, Zr) Acetylacetonates

Authors
Journal
Journal of Colloid and Interface Science
0021-9797
Publisher
Elsevier
Publication Date
Volume
231
Issue
1
Identifiers
DOI: 10.1006/jcis.2000.7119
Keywords
  • Mesoporous Silica Gel
  • Metal (Ti
  • Cr
  • Co
  • Ni
  • Zn
  • Zr) Acetylacetonate Pyrolysis
  • Carbon Deposit
  • Carbon–Metal Compound Deposit
  • Pore Size Distribution
  • Fractal Dimension Distribution
  • Tem
  • Tpd-Dtg
  • Water Desorption
  • Activation Energy Distribution
Disciplines
  • Mathematics

Abstract

Abstract Mesoporous silica gels modified due to pyrolysis of acetylacetone or acetylacetonates (AcAc) of zirconium [Zr(AcAc)4], titanium [titanyl TiO(AcAc)2], nickel [Ni(AcAc)2], zinc [Zn(AcAc)2], chromium [Cr(AcAc)3], and cobalt [Co(AcAc)2] were studied using nitrogen adsorption–desorption, TPD-DTG, TEM, XRD, and XRF methods. Grafted C/X phases consist of metal compounds (X denotes oxide, silicate, or metal crystallites) and pregraphite pyrocarbon, whose characteristics can be varied by changing the metal in M(AcAc)n. The structural parameters of C/X/SiO2, such as the specific surface area of micro- and mesopores, pore volume, pore size and fractal dimension distributions, and adsorptive ability, depend nonlinearly on the concentrations of the C/X deposit due to alterations in the topology of grafted matters with increased concentrations and a possible catalytic effect of the X phase on pyrolysis.

There are no comments yet on this publication. Be the first to share your thoughts.