Effects of ultrasonic irradiation on crystallization and structural properties of EMT-type zeolite nanocrystals

Research output: Journal Publications and Reviews (RGC: 21, 22, 62)21_Publication in refereed journalNot applicablepeer-review

22 Scopus Citations
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Author(s)

  • Eng-Poh Ng
  • Hussein Awala
  • Jia-Pei Ghoy
  • Aurélie Vicente
  • Tau Chuan Ling
  • Svetlana Mintova
  • Farook Adam

Detail(s)

Original languageEnglish
Pages (from-to)38-45
Journal / PublicationMaterials Chemistry and Physics
Volume159
Online published10 Apr 2015
Publication statusPublished - 1 Jun 2015
Externally publishedYes

Abstract

Synthesis of EMT zeolite nanocrystals from rice husk ash biomass (RHA) under continuous ultrasonic irradiation is reported. The aging, nucleation and crystallization stages of EMT zeolite in the system were monitored at ambient temperature, and compared with the conventional hydrothermal method. It was found that ultrasonic wave induced rapid crystal growth of the nanosized EMT zeolite. Complete crystallization of EMT nanocrystals was achieved within 24 h which was much faster than conventional hydrothermal synthesis (36 h). Furthermore, XRD and TEM analyses revealed that more nuclei were formed during the nucleation stage, allowing the preparation of smaller zeolite nanocrystals with high crystallinity. The results also showed that sonocrystallization produced EMT zeolite with high yield (ca. 80%). The ultrasound-prepared EMT nanocrystals were also found to have high porosity and high hydrophilicity, making the material promising for water sorption applications including vapor sensing, heat pump and adsorption technologies.

Research Area(s)

  • Crystal growth, Crystallization, Microporous materials, Ultrasonic techniques

Citation Format(s)

Effects of ultrasonic irradiation on crystallization and structural properties of EMT-type zeolite nanocrystals. / Ng, Eng-Poh; Awala, Hussein; Ghoy, Jia-Pei; Vicente, Aurélie; Ling, Tau Chuan; Ng, Yun Hau; Mintova, Svetlana; Adam, Farook.

In: Materials Chemistry and Physics, Vol. 159, 01.06.2015, p. 38-45.

Research output: Journal Publications and Reviews (RGC: 21, 22, 62)21_Publication in refereed journalNot applicablepeer-review