Al-Si@Al(OH)3 Nanosheets Composite for Enhanced Efficient Strategy to Synthesize Al-Si@Al2O3 Core-Shell Structure

Owing to the combined advantages of Al-Si alloy and Al2O3, Al-Si@Al2O3 is widely utilized as a heat storage material, catalyst carrier, and water adsorption host. Hence, the preparation of Al-Si@Al2O3 and corresponding precursors is of utmost significance. Herein, an Al-Si@Al(OH)3 precursor is investigated, and Al(OH)3 nanosheets are in situ formed on the surface of Al1-xSix, where x = 0,10, 0,20, and 0,30 in the presence of water. The influence of the Si content, diameter of Al-Si particles, and heating parameters on the morphology and thickness of the Al(OH)3 nanosheets is systematically explored using X-ray diffraction, electron microscopy, Fourier transform infrared spectroscopy, and N2 adsorption/desorption isotherms. The growth mechanism of Al(OH)3 nanosheets is revealed, and a pathway to obtain Al-Si@Al2O3 nanosheets with the desired structure and thickness is demonstrated.