One-step synthesis, characterization and oxidative desulfurization of 12-tungstophosphoric heteropolyanions immobilized on amino functionalized SBA-15

Xuan Nui Pham*, Dinh Linh Tran, Tuan Dat Pham, Quang Man Nguyen, Van Thi Tran Thi, Huan Doan Van

*Corresponding author for this work

Research output: Contribution to journalArticle (Academic Journal)

16 Citations (Scopus)
98 Downloads (Pure)

Abstract

Keggin-type 12-tungstophosphoric [PW12O40]3− heteropolyanions were successfully immobilized onto mesoporous material surface of SBA-15 functionalized using the (3-aminopropyl)triethoxysilane (APTES) synthesized by one-pot co-condensation method, also called one-step synthesis. The synthesized PW-NH3 +-SBA-15 catalyst was characterized by XRD, N2 adsorption–desorption, FT-IR, TGA, SEM, TEM, EDS, XPS methods. The results indicated that ordered hexagonal mesostructure for SBA-15 support was still maintained after being functionalized with amine groups, while the specific surface area of SBA-15 was decreased. The active species of phosphotungstic acid H3PW12O40 (HPW) retained its Keggin structure of the heteropolyanions on the amine-modified SBA-15. The PW+H3N–SBA–15 catalyst exhibited a high catalytic activity for oxidative desulfurization process of sulfur-containing model fuel. The dibenzothiophene (DBT) conversion of almost 100% was achieved with reaction conditions of 40 mg of catalyst dosage, 2 mL of hydrogen peroxide, 90 °C of reaction temperature, and 120 min of reaction time.

Original languageEnglish
Pages (from-to)58-65
Number of pages8
JournalAdvanced Powder Technology
Volume29
Issue number1
Early online date31 Oct 2017
DOIs
Publication statusPublished - 1 Jan 2018

Keywords

  • Dibenzothiophene
  • Functional mesoporous materials
  • Heteropoly acid
  • One-pot synthesis
  • Oxidative desulfurization

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