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Journal of Sol-Gel Science and Technology
Erschienen in: Journal of Sol-Gel Science and Technology 3/2018

14.02.2018 | Original Paper: Nano-structured materials (particles, fibers, colloids, composites, etc.)

Natural clay attapulgite as the raw material for synthesis of Al/Ti/Mg-containing mesoporous silicates with cubic, 3D hexagonal, and lamellar mesostructures

verfasst von: Bing Guo, Xiuzhen Lin, Zhongyong Yuan

Erschienen in: Journal of Sol-Gel Science and Technology | Ausgabe 3/2018

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Abstract

A series of Al/Ti/Mg-containing ordered mesostructured silicates were synthesized using the natural attapulgite clay as the raw material, which was first pretreated by 4 M hydrochloric acid without other special treatment such as grinding. By varying the pH value in the synthetic gel, different mesophases with cubic, 3D hexagonal, and lamellar mesostructures were obtained. Their mesostructures were confirmed by low-angle X-ray diffraction (XRD) and transmission electron microscopy (TEM). Their morphology and textural properties were analyzed by scanning electron microscopy (SEM) and N2 adsorption. It was found that the hetero-atoms including Al, Ti, and Mg in the clay could be effectively transformed into these ordered mesostructured silicate frameworks in sufficient content, as revealed by inductively coupled plasma (ICP) emission spectroscopy and fourier transform infrared (FT-IR) spectrum. NH3-TPD showed the accessibility of Al species as Brönsted and Lewis acid sites in the mesostructured framework located on the pore surface. All above suggests the potential of attapulgite as a low-cost precursor for the industrial scale production of high quality heteroatom-doped mesophases for various applications. Low-angle powder X-ray diffraction patterns of mesostructured silicates with cubic, 3D hexagonal, and lamellar mesophases, synthesized by using natural clay attapulgite as raw material: uncalcined (left) and calcined (right).
Vorheriger Artikel One-pot synthesis of porous nickel–manganese sulfides with tuneable compositions for high-performance energy storage
Nächster Artikel Selective catalytic reduction of NO x by CO over LaMnO3 nano perovskites prepared by microwave and ultrasound assisted sol–gel method

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Metadaten
Titel
Natural clay attapulgite as the raw material for synthesis of Al/Ti/Mg-containing mesoporous silicates with cubic, 3D hexagonal, and lamellar mesostructures
verfasst von
Bing Guo
Xiuzhen Lin
Zhongyong Yuan
Publikationsdatum
14.02.2018
Verlag
Springer US
Erschienen in
Journal of Sol-Gel Science and Technology / Ausgabe 3/2018
Print ISSN: 0928-0707
Elektronische ISSN: 1573-4846
DOI
https://doi.org/10.1007/s10971-018-4596-z

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