Synthesis of micro- and mesoporous aluminosilicates in the presence of polyethylene glycol

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Natural and synthetic aluminosilicates currently have a wide range of applications. Silicon-containing wastes of rice production are of great interest as a source of raw materials for their production. The purpose of this work is to synthesize micro- and mesoporous materials from rice husk by templat method using PEG-6000. The obtained samples were investigated by differential thermal analysis and IR spectroscopy, which showed the introduction of PEG into the structure of potassium aluminosilicate during sol-gel synthesis. The specific surface area of the samples and pore size distribution were determined by low-temperature nitrogen adsorption, according to which it was found that the pore radius increased from 100 to 200 Å during sol-gel synthesis when the PEG concentration was changed from 5 to 20 mmol/L. The study of the surface of the samples by scanning electron microscopy showed that the introduction of templat changes their surface morphology and promotes structuring.

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O. Arefieva

Far Eastern Federal University; Institute of Chemistry Far-Eastern Branch of the Russian Academy of Sciences

Email: dovgan.sv@dvfu.ru
俄罗斯联邦, Vladivostok; Vladivostok

S. Dovgan

Far Eastern Federal University

编辑信件的主要联系方式.
Email: dovgan.sv@dvfu.ru
俄罗斯联邦, Vladivostok

A. Kovekhova

Far Eastern Federal University; Institute of Chemistry Far-Eastern Branch of the Russian Academy of Sciences

Email: dovgan.sv@dvfu.ru
俄罗斯联邦, Vladivostok; Vladivostok

A. Panasenko

Institute of Chemistry Far-Eastern Branch of the Russian Academy of Sciences

Email: dovgan.sv@dvfu.ru
俄罗斯联邦, Vladivostok

M. Tsvetnov

Far Eastern Federal University

Email: dovgan.sv@dvfu.ru
俄罗斯联邦, Vladivostok

A. Kozlov

Far Eastern Federal University

Email: dovgan.sv@dvfu.ru
俄罗斯联邦, Vladivostok

K. Pervakov

Far Eastern Federal University

Email: dovgan.sv@dvfu.ru
俄罗斯联邦, Vladivostok

参考

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2. Fig. 1. Scheme for obtaining potassium aluminosilicate samples in the presence of the structure-controlling agent PEG-6000.

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3. Fig. 2. SEM image of the control sample AL(K)-0.

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4. Fig. 3. SEM images of aluminosilicate samples: a – Al(K)-5; b – Al(K)-5(p).

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5. Fig. 4. SEM images of aluminosilicate samples: a – Al(K)-10; b – Al(K)-10(p).

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6. Fig. 5. SEM images of aluminosilicate samples: a – Al(K)-20; b – Al(K)-20(p).

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7. Fig. 6. Nitrogen adsorption–desorption isotherm at 77 K for the control sample Al(K)-0.

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8. Fig. 7. Nitrogen adsorption–desorption isotherms at 77 K for aluminosilicate samples: a – Al(K)-5; b – Al(K)-5(p).

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9. Fig. 8. Nitrogen adsorption–desorption isotherms at 77 K for aluminosilicate samples: a – Al(K)-10; b – Al(K)-10(p).

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10. Fig. 9. Nitrogen adsorption–desorption isotherms at 77 K for aluminosilicate samples: a – Al(K)-20; b – Al(K)-20(p).

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11. Fig. 10. Differential curve of pore volume distribution by radius of the Al(K)-0 sample.

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12. Fig. 11. Differential curves of pore volume distribution by radius of potassium aluminosilicate samples: a – Al(K)-5; b – Al(K)-10; c – Al(K)-20.

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13. Fig. 12. Differential curves of pore volume distribution by radius of potassium aluminosilicate samples: a – Al(K)-5(p); b – Al(K)-10(p); c – Al(K)-20(p).

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14. Fig. 13. Integral curves of mass loss of potassium aluminosilicate samples.

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15. Fig. 14. Differential curves of temperature change of potassium aluminosilicate samples.

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16. Fig. 15. IR spectra of potassium aluminosilicate samples: 1 – Al(K)-0; 2 – Al(K)-5(p); 3 – Al(K)-10(p); 4 – Al(K)-20(p).

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17. Fig. 16. IR spectra of potassium aluminosilicate samples: 1 – Al(K)-5; 2 – Al(K)-10; 3 – Al(K)-20.

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