Influence of Various Sol–Gel Parameters on the Physico-Chemical Properties of Sulfuric Acid Chelated Zirconia Aerogels Dried at Ambient Pressure

Uzma K.H. Bangi, Bhushan Patil, Rajendra C. Pawar, Hyung Ho Park

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5 Citations (Scopus)

Abstract

This work represents the influence of various sol–gel parameters on the physico-chemical properties of sulfuric acid chelated zirconia aerogels dried at ambient pressure. The sol–gel parameters such as concentrations of precursor, chelating agent and catalyst are found to be the dominant factors which influence the physical, chemical and textural properties of the aerogels. Therefore, the influence of concentration of Zr precursor, ZrPr:H2SO4 molar ratio and ZrPr:H2O molar ratio on these properties of zirconia aerogels is studied. Zirconia lacogels are formed by the hydrolysis and condensation of zirconium n-propoxide in n-propanol chelated with sulfuric acid (18.4 M) and catalyzed with deionized water. Aerogels are obtained by subsequent solvent exchange, silylation, washing and ambient pressure drying. The physico-chemical properties of as synthesized zirconia aerogels are carried out using FESEM, EDS, BET analysis and FTIR spectroscopy. The good quality zirconia aerogels are obtained using the molar ratio of ZrPr:PrOH:H2SO4:H2O:HMDZ::1:2.93:1.18:1.77:0.59. They possess the density of 0.54 g cm-3, BET surface area of 328 m2 g-1 and micropore volume of 0.028 cm3 g-1. These aerogels can be applied as heterogeneous catalysts in many fields.

Original languageEnglish
Article number2000025
JournalMacromolecular Symposia
Volume393
Issue number1
DOIs
Publication statusPublished - 2020 Oct 1

Bibliographical note

Publisher Copyright:
© 2020 Wiley-VCH GmbH

All Science Journal Classification (ASJC) codes

  • Condensed Matter Physics
  • Organic Chemistry
  • Polymers and Plastics
  • Materials Chemistry

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