Urea controlled hydrothermal synthesis of ammonium aluminum carbonate hydroxide rods
Source abstract
Abstract
In this study, ammonium aluminum carbonate hydroxide (AACH) rods were controllably prepared using the hydrothermal method by manipulating the amount of urea in the reaction system. The experimental results showed that AACH in rod shape was able to be gradually transformed from γ-AlOOH in cluster shape during the molar ratios of urea to Al in the reactants were ranged from 8 to 10, and the yield of AACH has increased accordingly. When the molar ratio of urea to Al reaches 11, pure AACH rods with a diameter of 500 nm and a length of 10 μm approximately was able to be produced. Due to the slow decomposition of urea during the hydrothermal reaction, the nucleation and growth of AACH crystal proceed step by step. Therefore, the crystal can fully grow on each crystal plane and eventually produce a highly crystalline rod-shaped product. The role of urea in controlling the morphology and yield of AACH was also discussed in this paper systematically.
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Research context
OpenAlex topics: Magnesium Oxide Properties and Applications · Advanced ceramic materials synthesis · Layered Double Hydroxides Synthesis and Applications
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
Affiliations
School of Materials Science and Engineering, Shaanxi University of Science and Technology 1 , Xi’an 710021, PR China
Department of Chemistry and Chemical Engineering, Shaanxi Xueqian Normal University 2 , Xi’an 710100, PR China
Funding
National Natural Science Foundation of China
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