TY - JOUR
T1 - Continuous synthesis of high-surface-area aluminum hydroxide methoxide nano- and microparticles in supercritical methanol and their conversion into γ-Al2O3
AU - Veriansyah, Bambang
AU - Susanti, Ratna F.
AU - Nugroho, Agung
AU - Min, Byoung Koun
AU - Kim, Jaehoon
N1 - Funding Information:
This research was supported by Nano R&D program through the Korea Science and Engineering Foundation funded by the Ministry of Education, Science and Technology . The authors acknowledge Korea Research Council of Fundamental Science and Technology (KRCF) and Korea Institute of Science and Technology (KIST) for ‘National Agenda Program (NAP)’ for additional support.
Copyright:
Copyright 2011 Elsevier B.V., All rights reserved.
PY - 2011/2/28
Y1 - 2011/2/28
N2 - 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
AB - 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
KW - Aluminum hydroxide methoxide
KW - Nano- and microparticles
KW - Nanocrystalline materials
KW - Supercritical methanol
KW - γ-AlO
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U2 - 10.1016/j.matlet.2010.11.048
DO - 10.1016/j.matlet.2010.11.048
M3 - Article
AN - SCOPUS:78650503161
VL - 65
SP - 772
EP - 774
JO - Materials Letters
JF - Materials Letters
SN - 0167-577X
IS - 4
ER -