Al-O-Si bond formation in boehmite-fumed silica mixtures during mechanochemical activation

Al-O-Si bond formation in boehmite-fumed silica mixtures during mechanochemical activation

Al-O-Si bond formation in boehmite-fumed silica mixtures during mechanochemical activation was investigated by X-ray diffraction (XRD), Fourier transform infrared spectroscopy (FT-IR), magic angle spinning nuclear magnetic resonance (MAS-NMR) and X-ray photoelectron spectroscopy (XPS). The intrinsic...

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Veröffentlicht in:Interceram 2014, Vol.63 (7-8), p.372-375
Hauptverfasser: Chen, Liugang, Ye, Guotian, Li, Kunpeng, Wang, Qingfeng, Xu, Dayan, Guo, Muxing
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container_issue 7-8
container_start_page 372
container_title Interceram
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creator Chen, Liugang
Ye, Guotian
Li, Kunpeng
Wang, Qingfeng
Xu, Dayan
Guo, Muxing
description Al-O-Si bond formation in boehmite-fumed silica mixtures during mechanochemical activation was investigated by X-ray diffraction (XRD), Fourier transform infrared spectroscopy (FT-IR), magic angle spinning nuclear magnetic resonance (MAS-NMR) and X-ray photoelectron spectroscopy (XPS). The intrinsic structure deformation of the boehmite was examined with XRD. Formation of new Al-O-Si bonds was illustrated by the incorporation of Al³⁺ in Si-O-Si linkages, the change in the Al coordination number of boehmite, and the appearance of new resonance in the ²⁹Si NMR spectrum of the ground mixture. The presence of Al-O units in silica frameworks was verified by the increase of Al 2p binding energy and the decrease of Si 2p binding energy.
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title Al-O-Si bond formation in boehmite-fumed silica mixtures during mechanochemical activation
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