Open AccessHydrothermal synthesis and characterization of nano-particles γ-Al2O3
Author(s) -
Haris Puspito Buwono,
Satworo Adiwidodo,
Hangga Wicaksono,
Hilmi Iman Firmansyah
Publication year - 2021
Publication title -
iop conference series. materials science and engineering
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.179
H-Index - 26
eISSN - 1757-899X
pISSN - 1757-8981
DOI - 10.1088/1757-899x/1073/1/012011
Subject(s) - crystallite , hydrothermal circulation , calcination , scherrer equation , hydrothermal synthesis , materials science , lattice constant , precipitation , diffraction , analytical chemistry (journal) , x ray crystallography , mineralogy , crystallography , chemical engineering , chemistry , catalysis , chromatography , physics , organic chemistry , engineering , optics , meteorology
The study of hydrothermal treatment on the phase formation and the crystallites of gamma-alumina (γ-Al 2 O 3 ) was performed. Different reaction time and temperature of hydrothermal treatment were investigated. The preparation of γ-Al 2 O 3 includes precipitation of aluminum nitrate nonahydrate by ammonia, aging, washing, transferred the gel into the hydrothermal reactor, drying, and calcination at 600 °C. The precipitation was stopped at pH equals 7.5. The reaction times of hydrothermal treatment were 1 – 2 hours, and the temperatures were 140 – 200 °C. X-Ray Diffraction analysis was used to investigate the phase formation and the particle size. The results show all the samples represented pure nano γ-Al 2 O 3 . The examination of hydrothermal treatment of y-Al 2 O 3 reveals as the reaction time longer, the crystallite grows bigger, as well as the higher temperature applied. The smallest γ-Al 2 O 3 obtained based on the Scherrer equation is 4 nm and the biggest is 6.5 nm. Interestingly, the peaks of the γ-Al 2 O 3 prepared by hydrothermal treatment at the longest time and the highest temperature have shifted into a higher diffraction angle. In the case of this sample, the peaks shifted into a higher diffraction angle. That is means there is a change in the lattice structure of γ-Al 2 O 3 probably was affected by the lattice of hydroxyl content.