| 000 | 02764nam a2200265Ia 4500 | ||
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| 003 | MX-MdCICY | ||
| 005 | 20250625162446.0 | ||
| 040 | _cCICY | ||
| 090 | _aB-20282 | ||
| 245 | 1 | 0 | _aEffects of clay activation and amine chain length on silica-palygorskite heterostructure properties |
| 490 | 0 | _vClay Minerals, doi:10.1180/clm.2023.6, 2023 | |
| 520 | 3 | _aVarious approaches have been used for the preparation of heterostructured materials based on clay minerals, with numerous potential applications offered by the resulting functional materials. In this study, a fibrous clay mineral (palygorskite)and a tetraethyl orthosilicate reagent were used to obtain silica-palygorskite heterostructures. The aim was to highlight the influence of two factors during the preparation process: the effect of acid activation pre-treatment of the palygorskite with HCl and the effect of varying the length of the amine chains used - dodecylamine and butylamine - on the formation and development of silica nanoparticles on the surface of the palygorskite fibres. The silica-palygorskite heterostructures were obtained after the removal of the organic templates by calcination at 500°C. The textural and structural properties of the silica-palygorskite heterostructured samples were determined using various experimental characterization techniques, such as X-ray diffraction, transmission electron microscopy, gas adsorption and Fourier-transform infrared spectroscopy. The experimental variables targeted in this study appeared to have a significant effect on the textural properties of the silica-palygorskite heterostructure obtained. The great specific surface area and the mesoporous, microporous and ultramicroporous volumes as determined using nitrogen and/or carbon dioxide gas adsorption confirm the benefit of combining the acid activation pre-treatment of the fibrous clay mineral with the use of a long-chain amine co-surfactant (dodecylamine). The resulting silica-palygorskite heterostucture has a great specific surface area (628 m2 g-1)and a well-developed total pore network (VN2 = 0.24 cm3 g-1; Vultra (CO2)= 0.18 cm3 g-1). This material will be tested for the removal of volatile organic compounds at low concentrations. | |
| 650 | 1 | 4 | _aACID TREATMENT |
| 650 | 1 | 4 | _aAMINE CHAIN LENGTH |
| 650 | 1 | 4 | _aHETEROSTRUCTURE |
| 650 | 1 | 4 | _aPALYGORSKITE |
| 650 | 1 | 4 | _aPHYSICOCHEMICAL CHARACTERIZATIONS |
| 650 | 1 | 4 | _aSILICA NANOPARTICLES |
| 700 | 1 | 2 | _aBoudriche, L. |
| 700 | 1 | 2 | _aBergaya, F. |
| 700 | 1 | 2 | _aBoudjemaa, A. |
| 856 | 4 | 0 |
_uhttps://drive.google.com/file/d/1hLUF_NZ4lZ_e_IeYqs5BjwbSu8uzoJJv/view?usp=drivesdk _zPara ver el documento ingresa a Google con tu cuenta: @cicy.edu.mx |
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