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Issue: 2026: Natural Sciences Issue - Online First
Section: Natural Sciences Issue (English)
DOI: 10.52714/dthu.ns.2672.1897
Date Published: 03/05/2026
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Nguyen, T. H. N., Nguyen, N. D., Tran, B. Q., Thach, B. K., Pham, B. D. T., Pham, T. H., Pham, T. K. H., & Ngo, H. D. (2026). Impact of annealing conditions on the crystal quality of hydrothermal treated -AlOOH. Dong Thap University Journal of Science - Natural Sciences Issue, Online First, 1-11. https://doi.org/10.52714/dthu.ns.2672.1897

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Impact of annealing conditions on the crystal quality of hydrothermal treated -AlOOH

Thi Hong Nhung Nguyen1, Nguyen Duy Nguyen1, Bao Quan Tran1, Bao Khang Thach1, Bich Diep T. Pham1, Thanh Hoa Pham2, Thi Kim Hang Pham1, Hai Dang Ngo3,  
1 Ho Chi Minh city University of Technology and Education
2 Faculty of engineering and technology, Van Hien University, Ho Chi Minh city
3 Ho Chi Minh city University of Technology and Education (HCMUTE)

Main Article Content

Abstract

Among different material families, oxide hydroxides have emerged as promising cadidates for different advanced applications such as catalysis, adsorption, and ceramics. In this paper, the synthesis of Boehmite ( -AlOOH) powder via the hydrothermal technique and  the influence of annealing temperature and duration on its crystal structure is reported. Different annealing temperatures (100, 200 and 300oC) and durations (1, 2, and 3 hours) were applied on synthesized AlOOH powder. The crystal structure and crystallite size of the samples were evaluatedvia X-ray diffraction patterns. The proportion of atoms in the powder sample was ascertained utilizing Energy Dispersive X-ray Spectroscopy. The sample's molecular compositionswere meticulously investigated using Fourier-transform infrared spectroscopy. Experimental results indicate that AlOOH generated via the hydrothermal technique exhibits crystallite sizes between 8.27 nm and 15.31 nm. Besides, The hydrothermal time was significantly reduced, and the crystal quality and properties of AlOOH powder were improved by using precursors such as Al(NO₃)₃, CTAB, and NH₃·H₂O in combination with annealing conditions. The 300 °C samples have the highest particle size and minimal microstrain, signifying a solid crystal structure with few imperfections. 

Keywords

aluminium oxide hydroxide, powder, hydrothermal, annealing conditions, crystal structures.

Article Details

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This work is licensed under a Creative Commons Attribution-NonCommercial 4.0 International License.

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