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Soft Solution Processing for the Synthesis of Alumina Nanoparticles in the Presence of Glucose
Author(s) -
Naskar Milan Kanti
Publication year - 2010
Publication title -
journal of the american ceramic society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.9
H-Index - 196
eISSN - 1551-2916
pISSN - 0002-7820
DOI - 10.1111/j.1551-2916.2009.03555.x
Subject(s) - calcination , crystallite , fourier transform infrared spectroscopy , materials science , transmission electron microscopy , thermogravimetry , particle size , bet theory , scanning electron microscope , analytical chemistry (journal) , nanoparticle , specific surface area , mineralogy , nuclear chemistry , chemical engineering , nanotechnology , chemistry , adsorption , metallurgy , composite material , chromatography , catalysis , organic chemistry , engineering
Alumina nanoparticles were synthesized following hydrothermal process at 170°C for 6 h, using glucose and other water‐based precursor materials. The uncalcined and calcined (550°–1200°C) particles were characterized by differential thermal analysis, thermogravimetry, Fourier transform infrared spectroscopy (FTIR), X‐ray diffraction (XRD), and multipoint Brunauer–Emmett–Teller (BET) surface area. The microstructures of the calcined (at 550°C) particles were examined by field‐emission scanning electron microscopy (FESEM) and transmission electron microscopy (TEM). XRD and FTIR studies revealed that gamma‐alumina (γ‐Al 2 O 3 ) persisted up to 1000°C followed by the appearance of alpha‐alumina (α‐Al 2 O 3 ) at 1200°C. BET surface area analysis confirmed that the specific surface area of γ‐Al 2 O 3 was higher compared with α‐Al 2 O 3 . Because of particle agglomeration, the crystallite sizes obtained by the BET method showed larger values than those determined by the XRD method for the samples calcined at 550°–1200°C. For 550°C‐treated sample, FESEM micrograph showed the aggregated particles of size 20–80 nm, while TEM image of the same sample revealed a particle size of 5–10 nm.