Continuous synthesis of high-surface-area aluminum hydroxide methoxide nano- and microparticles in supercritical methanol and their conversion into γ-Al2O3

Bambang Veriansyah, Ratna F. Susanti, Agung Nugroho, Byoung Koun Min, Jaehoon Kim

Research output: Contribution to journalArticle

5 Citations (Scopus)

Abstract

High-surface-area aluminum hydroxide methoxide (CH4Al 2O4) nano- and microparticles are synthesized continuously in supercritical methanol (scMeOH). The properties of the particle synthesized in scMeOH are compared with those synthesized in supercritical water (scH 2O). The XRD analysis reveals that the particles synthesized in scMeOH retain aluminum hydroxide methoxide crystalline structure while the particles synthesized in supercritical water retain boehmite (AlOOH) crystalline structure. Plate-shape particles are synthesized in scH2O while highly porous, flake-like particles are synthesized in scMeOH. Due to the porous structure, the CH4Al2O4 particles have much higher BET surface area (314 m2/g) than that of the boehmite particles (35.9 m2/g). The FT-IR analysis indicates that aliphatic, carbonyl, and hydroxyl groups are present on the surface of the CH 4Al2O4 particles. When heat treated at 800°C, the CH4Al2O4 phase is converted to γ-Al2O3 phase with a BET surface area of 164 m 2/g. Crown

Original languageEnglish
Pages (from-to)772-774
Number of pages3
JournalMaterials Letters
Volume65
Issue number4
DOIs
Publication statusPublished - 2011 Feb 28

Keywords

  • Aluminum hydroxide methoxide
  • Nano- and microparticles
  • Nanocrystalline materials
  • Supercritical methanol
  • γ-AlO

ASJC Scopus subject areas

  • Materials Science(all)
  • Condensed Matter Physics
  • Mechanics of Materials
  • Mechanical Engineering

Fingerprint Dive into the research topics of 'Continuous synthesis of high-surface-area aluminum hydroxide methoxide nano- and microparticles in supercritical methanol and their conversion into γ-Al<sub>2</sub>O<sub>3</sub>'. Together they form a unique fingerprint.

  • Cite this