Comparison of the morphology and structure of WO3 nanomaterials synthesized by a sol-gel method followed by calcination or hydrothermal treatment

Diah Susanti*, N. Stefanus Haryo, Hasnan Nisfu, Eko Prasetio Nugroho, Hariyati Purwaningsih, George Endri Kusuma, Shao Ju Shih

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

23 Citations (Scopus)

Abstract

Tungsten (VI) oxide (WO3) nanomaterials were synthesized by a sol-gel method using WCl6 and C2H5OH as precursors followed by calcination or hydrothermal treatment. X-Ray diffraction (XRD), scanning electron microscopy (SEM) and high resolution transmission electron microscopy (HRTEM) equipped with energy dispersive X-ray spectroscopy (EDX) were used to characterize the structure and morphology of the materials. There were significant differences between the WO3 materials that were calcinated and those that were subjected to a hydrothermal process. The XRD results revealed that calcination temperatures of 300°C and 400°C gave hexagonal structures and temperatures of 500°C and 600°C gave monoclinic structures. The SEM images showed that an increase in calcination temperature led to a decrease in the WO3 powder particle size. The TEM analysis showed that several nanoparticles agglomerated to form bigger clusters. The hydrothermal process produced hexagonal structures for holding times of 12, 16, and 20 h and monoclinic structures for a holding time of 24 h. The SEM results showed transparent rectangular particles which according to the TEM results originated from the aggregation of several nanotubes.

Original languageEnglish
Pages (from-to)371-380
Number of pages10
JournalFrontiers of Chemical Science and Engineering
Volume6
Issue number4
DOIs
Publication statusPublished - Dec 2012

Keywords

  • WO nanomaterial
  • calcination
  • hydrothermal
  • sol-gel method

Fingerprint

Dive into the research topics of 'Comparison of the morphology and structure of WO3 nanomaterials synthesized by a sol-gel method followed by calcination or hydrothermal treatment'. Together they form a unique fingerprint.

Cite this