Influence of Heat Treatment After Arc Discharge Route on Structure and Loading Capacity of SBA-15 Encapsulated By Iron Particles


For the first time, the influence of heat treatment on the structure of SBA-15 encapsulated iron particle has been investigated after arc discharge methods. Molecular sieve silica SBA-15 was prepared by self-assembly route using block copolymer P123 as soft templating agent and tetraethoxysilane as silica precursor involving acid treatment. Arc discharge route was followed by heat-treatment of SBA-15 for 4 h at 400, 700 and 900 ∘C. The change of sample structure was studied by X-ray diffraction, scanning electron microscopy and nitrogen adsorption-desorption techniques, VSM and FTIR. It is found that after arc discharge step, the magnetic properties of SBA-15 encapsulated iron particle reached stable crystal at high temperature. In the other way, the massive structural change in a significant part of SBA-15 encapsulated iron particle during high temperature had an impact on the decreased surface area, total pore volume, and post size distribution. The loading capacity performance of SBA-15 encapsulated iron particle was investigated by ibuprofen molecule impregnation as a drug model. The result showed that high-temperature treatment of SBA-15 encapsulated iron particle decreased the loading capacity which was firmly related to the shrinkage of mesoporous nanopipe of SBA-15.


[1] Nejad F N, Shams E, Amini M K, and Bennett J C 2013 Microporous Mesoporous Mater. 2 239-46

[2] Ulfa M, and Jannah A M 2018 Oriental J. Chem. 341 420–29

[3] Luan Z and Fournier, J A, 2005 Microporous Mesoporous Mater. 79 1–3, 235–40

[4] Havránek A and Zemánek, I, 2017 J. Magn. Magn.Mater. 443 137–41

[5] Yu A, Niu W, Hong X, He Y, Wu M, Chen Q, and Ding M 2018 Tribol. Int. 57 84–93

[6] Kletetschka G 2018 Earth Planet. Sci. Lett. 487 1–8

[7] Du J, Liu X, Qin H, Wei Z, Kong X, and Liu Q 2018 Physica C: Supercond. 547 1–6

[8] Khedr DM, Aly S H, Shabara R M, and Yehia S 2017, J.Magn. Magn.Mater. 430 103–8

[9] Kumari R, Singh A, Yadav BS, Ranjan, D, Ghosh, A, Guha, P, Tyagi, P K 2017 Carbon 119 464–75

[10] Eremina R, Seidov Z, Ibrahimov I, Najafzade M, Aljanov M and Mamedov, D 2017 J. Magn. Magn. Mater. 440 179–80

[11] DY Zhao J L, Feng QS, Huo N, Melsoh G H, Fredrickson BF, Chmelka GD 1998 Science 279 548–52

[12] Chaitoglou S, Sanaee M R, Aguayo N, Bertran E 2014 J. Nanomater. 32 34