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

Abstract Owing to the combined advantages of Al-Si alloy and Al 2 O 3 , Al-Si@Al 2 O 3 is widely utilized as a heat storage material, catalyst carrier and what adsorption host. Hence, the preparation of Al-Si@Al 2 O 3 and corresponding precursors is of utmost significance. Herein, Al-Si@Al(OH) 3 precursor is investigated and Al(OH) 3 nanosheets are in-situ formed on the surface of Al- x Si alloy ( x = 10, 20 and 30) in the presence of water. The influence of Si content, diameter of Al-Si particles and heating parameters on morphology and thickness of Al(OH) 3 nanosheets is systematically explored using X-ray diffraction, electron microscopy, Fourier transform infrared spectroscopy and N 2 adsorption/desorption isotherms. The growth mechanism of Al(OH) 3 nanosheets is revealed and a pathway to obtain Al-Si@Al 2 O 3 nanosheets with desired structure and thickness is demonstrated.