Transparent monolithic metal ion containing nanophase aerogels

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The formation of monolithic and transparent transition metal containing aerogels has been achieved through cooperative interactions of high molecular weight functionalized carbohydrates and silica precursors, which strongly influence the kinetics of gelation. After initial gelation, subsequent modification of the ligating character of the system, coordination of the group VIII metal ions, and supercritical extraction afford the aerogels. The structures at the nanophase level have been probed by photon and electron transmission and neutron scattering techniques to help elucidate the basis for structural integrity together with the small entity sizes that permit transparency in the visible range. They also help with ... continued below

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13 p.

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Risen, W. M., Jr.; Hu, X.; Ji, S. & Littrell, K. December 1, 1999.

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Description

The formation of monolithic and transparent transition metal containing aerogels has been achieved through cooperative interactions of high molecular weight functionalized carbohydrates and silica precursors, which strongly influence the kinetics of gelation. After initial gelation, subsequent modification of the ligating character of the system, coordination of the group VIII metal ions, and supercritical extraction afford the aerogels. The structures at the nanophase level have been probed by photon and electron transmission and neutron scattering techniques to help elucidate the basis for structural integrity together with the small entity sizes that permit transparency in the visible range. They also help with understanding the chemical reactivities of the metal-containing sites in these very high surface area materials. These results are discussed in connection with new reaction studies.

Physical Description

13 p.

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OSTI as DE00750610

Medium: P; Size: 13 pages

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  • 2000 MRS Spring Meeting, San Francisco, CA (US), 04/24/2000--04/28/2000

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  • Report No.: ANL/IPNS/CP-100631
  • Grant Number: W-31109-ENG-38
  • Office of Scientific & Technical Information Report Number: 750610
  • Archival Resource Key: ark:/67531/metadc704385

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Office of Scientific & Technical Information Technical Reports

Reports, articles and other documents harvested from the Office of Scientific and Technical Information.

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  • December 1, 1999

Added to The UNT Digital Library

  • Sept. 12, 2015, 6:31 a.m.

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  • April 7, 2017, 1:19 p.m.

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Risen, W. M., Jr.; Hu, X.; Ji, S. & Littrell, K. Transparent monolithic metal ion containing nanophase aerogels, article, December 1, 1999; Illinois. (digital.library.unt.edu/ark:/67531/metadc704385/: accessed December 15, 2017), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.