Polymer Sol–Gel Synthesis of Hybrid Nanocomposites
T1 - Sol-gel synthesis and gas adsorption properties of CuCl modified mesoporous alumina
Several articles in the Journal of Sol-Gel Science and Technology
N2 - Mesoporous yttria stabilized zirconia (YSZ) membranes can be used as supports for ultrathin dense ceramic or metallic membranes, and for ultrafiltration (UF) applications in harsh environments. This paper reports synthesis and characterization of sol-gel derived UF YSZ membranes. 0.25 M zirconia sol was prepared by hydrolysis and condensation of zirconium n-propoxide. A solution-sol mixing method was used to dope 8 mol% yttria in zirconia. Supported YSZ membranes were prepared by dip-coating the yttrium doped zirconia sol on the porous α-alumina substrate, followed by drying and calcining under controlled conditions. The membranes prepared in this study are of cubic fluorite phase. Helium permeation experiments show that the supported membranes are pin-hole (or crack) free. The 5 time dip-coated membrane determined by SEM micrograph is about 3.5 μm in thickness, with an average pore diameter of 3 nm.
A nonhydrolytic sol−gel reaction between titanium(IV) isopropoxide and oleic acid at 270 °C generated 3.4 nm (diameter) × 38 nm (length) sized TiO2 nanocrystals.
Sol-Gel Science: The Physics and Chemistry of Sol-Gel Processing.
The alkoxide sol−gel synthesis of nanostructured TiO2 has been studied systematically to examine the processing parameters that control crystallite size and phase. Nonagglomerated, ultrafine anatase particles have been generated by hydrothermally treating the sol−gel-derived hydrous oxides. The degree of crystallinity and purity of the synthesized materials could affect their structural evolution during heat treatment. It was found that the 10-nm anatase TiO2 sample derived by hydrothermal processing at 180 °C underwent neither phase change nor significant grain growth up to 800 °C. Nanocrystalline rutile TiO2 particles have also been attained via hydrothermal treatment in an acidic medium. They possessed an ultrafine rutile grain size and a high surface area, which could not be achieved via phase transformation from thermal treatment of anatase particles.
The ISGS is proud to announce that the recipients of the Ulrich Award for 2017 are:
- Vladimir and Alexandr Vinogradov, ITMO University , Russia
- Tim Fellinger, Chalmers University of Technology, Sweden.
The ISGS board decided in collaboration with the selection committee (Head: Prof. David Avnir) to give 2 prizes for 3 recipients.
Single prize is shared by Vladimir and Alexandr Vinogradov for their joint achievements.
Those recipients will give award lectures at Sol-Gel conference in Liege, Thursday morning award session.
T1 - Sol-gel synthesis and luminescent properties of oxyfluoride LaOF
Fellows of the ISGS shall be persons of good reputation who have reached their 45th birthday and who shall have been members of the Society at least four years continuously at the established nomination deadline date when nominated. They shall prove qualified for elevation to the grade of Fellow by reason of outstanding contributions to the sol-gel sciences and technology; through broad and productive scholarship in sol-gel science and technology, by conspicuous achievement in sol-gel industry or by outstanding service to the ISGS.
Applicants should provide an Executive Summary of their PhD thesis (up to 15 pages), highlighting the relevance and contribution of the work to the sol-gel chemistry field. This Executive Summary will be the primary source of the PhD Award Committee’s consideration.
Polymer Sol?Gel Synthesis of hybrid nanocomposites
Sol−Gel Synthesis and Hydrothermal Processing of …
T1 - Sol-gel synthesis and characterization of yttria stabilized zirconia membranes
Sol gel Synthesis of Nanomaterials | Colloid | Gel
KW - Sol-gel synthesis
Sol-Gel Synthesis of Titanium Dioxide | SpringerLink
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Preparation of a Sol Gel - YouTube
The ISGS will award annually a prize to the student who has produced the best PhD thesis and made the most outstanding contribution to scientific and/or technological knowledge in the field of sol-gel chemistry and related fields.
Sonochemical Effects on Sol-Gel Processes - Hielscher
Organic-Inorganic materials Since 1980, a new family of gels, named hybrids, has been studied. Thanks to the wide potentialities of organic chemistry, it was possible to synthesize suitable chemical precursors which consist of inorganic and organic groups. According to the morphology of the starting molecule (like hyper-branched precursors) or the nature of some bonds (hydrophobic Si-CH3 or Si-H groups), it is possible to build up a network with controlled pore size. Moreover Si-R groups lead to more compliant xerogels. During drying the shrinkage of the network is of great extent and stresses which act on the solid part are lowered. Finally a nearly fully dense xerogel is obtained. The pore size decreases and reaches low values. The material is transparent and has properties close to those of glass. Accordingly, the diffusion of oxygen molecules is very low. Consequently specific organic molecules may be incorporated to this matrix.
By changing the nature of R, it is possible to control the interaction between the xerogel matrix which plays the role of a host material and the optically active molecules embedded in such a transparent matrix. The field of optically organic molecules covers a lot of applications. These new hybrid xerogels show very attractive applications (tunable lasers using dye molecules, photochromism using spiropyrane molecules...).
Synthesis of silica nanoparticles by sol-gel
AB - Eu3+-doped LaOF oxyfluoride thin films were prepared by the sol-gel method using trifluoroacetic acid as the fluorine source. The photoluminescent properties of the films depended on the heating temperature as well as the Eu3+ concentration. The optimum concentration of Eu3+ for the strong visible emission at 611 nm was shown to be 10 mol%.
Sol-Gel Technology - IK4-TEKNIKER
N2 - Eu3+-doped LaOF oxyfluoride thin films were prepared by the sol-gel method using trifluoroacetic acid as the fluorine source. The photoluminescent properties of the films depended on the heating temperature as well as the Eu3+ concentration. The optimum concentration of Eu3+ for the strong visible emission at 611 nm was shown to be 10 mol%.
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