Novel hierarchically ordered porous vanado-silicate nanocomposites for the application in industrial catalysis

Matthew Howard, Jacob Whittle, Fan Zhang, Dongyuan Zhao, Tapas Sen

Research output: Chapter in Book/Report/Conference proceedingConference PaperResearchpeer-review

Abstract

Hierarchically ordered porous vanado-silicate (HOPVS) nanocomposties were prepared by multiple templating route such as polystyrene latex spheres, tri-block copolymer F 127 (EO 107PO 70EO 107) in the presence of a co-solvent (n-butanol). Novel materials exhibited high surface area consisting of macropores of diameter ∼330nm with interconnecting windows of ∼80nm The walls of the macropores were formed with disordered meso (∼7 nm diameter) and microporosity (< 2 nm diameter). Vanadyl (VO 4+) species were homogeneously dispersed in the uncalcined nanocomposites (8 line hyperfine patterns in 51V EPR signal) whereas calcined form exhibited no hyperfine pattern due to the aerial oxidation of paramagnetic (VO 4+) species to diamagnetic vanadium species. The calcined form exhibited good catalytic activity for the (i) oxidation of toluene to benzaldehyde, benzyl alcohol and cresols; (ii) oxidation of cis-cyclooctene to cyclooctene oxide; (iii) oxidation of phenanthrene to biphenyl 2,2′-dicarbaldehyde and 9,10 phenantrhaquinone in the presence of hydrogen peroxide.

Original languageEnglish
Title of host publicationTechnical Proceedings of the 2012 NSTI Nanotechnology Conference and Expo, NSTI-Nanotech 2012
PublisherNSTI
Pages495-498
Number of pages4
ISBN (Print)9781466562745
Publication statusPublished - 2012
Externally publishedYes
EventNanotechnology Conference and Trade Show (Nanotech) 2012 - Santa Clara, United States of America
Duration: 18 Jun 201221 Jun 2012

Conference

ConferenceNanotechnology Conference and Trade Show (Nanotech) 2012
Abbreviated titleNanotech 2012
CountryUnited States of America
CitySanta Clara
Period18/06/1221/06/12
OtherNanotechnology 2012: Advanced Materials, CNTs, Particles, Films and Composites - 2012 NSTI Nanotechnology Conference and Expo, NSTI-Nanotech 2012

Keywords

  • Catalysis
  • Macroporous
  • Nanoporous
  • Oxidation
  • Vanado-silicate

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