Preparation of core-shell structured amorphous aluminum hydroxide ultra-fine powders via a microwave-hydrothermal route
2011
Wu, Xiuyong | Meng, Xianfeng | Ding, Jing | Kong, Qian | Wang, Debao | Hu, Zhengshui
By using Al₂(SO₄)₃ aqueous solution and urea as raw materials, spherical and laminar morphology amorphous aluminum hydroxide (Al(OH)₃) ultra-fine powders were synthesized after 120min reaction time at 150°C via a microwave-hydrothermal route. It is interesting to note that the spherical particles could be self-encapsulated into the hollow shells which were constructed with the laminar morphology particles to form core-shell structured ultra-fine powders. The microscope analysis revealed that the spherical cores were around 1μm and the shells were about 2–3μm in diameter, respectively. To investigate the influencing factors and formation mechanism of the as-obtained core-shell structured amorphous aluminum hydroxide (Al(OH)₃) ultra-fine powders, samples subjected to different reaction durations were also studied.
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