Facile formation of hierarchical magnesium silicate hydrate microspheres as an adsorbent for the textile dyes--颗粒学报PARTICUOLOGY

Kyawoo, T., Karim, N., Jiang, C., Ahmed, S., Tian, W., Li, H., & Feng, Y. (2024). Facile formation of hierarchical magnesium silicate hydrate microspheres as an adsorbent for the textile dyes. Particuology, 93, 99-110. https://doi.org/10.1016/j.partic.2024.06.005

Facile formation of hierarchical magnesium silicate hydrate microspheres as an adsorbent for the textile dyes

Tin Kyawoo^a, Naveed Karim^a, Chao Jiang^a, Saeed Ahmed^b, Weiliang Tian^c, Huiyu Li^a *, Yongjun Feng^a *

a State Key Laboratory of Chemical Resource Engineering, Beijing Engineering Center for Hierarchical Catalysts, Beijing University of Chemical Technology, Beijing, 100029, China
b Department of Chemistry, The University of Chakwal, Chakwal, 48800, Pakistan
c College of Chemistry and Chemical Engineering, Tarim University, Alar, 843300, China

10.1016/j.partic.2024.06.005

Volume 93, October 2024, Pages 99-110

Received 11 May 2024, Revised 3 June 2024, Accepted 5 June 2024, Available online 18 June 2024, Version of Record 1 July 2024.

E-mail: huiyuli@mail.buct.edu.cn; yjfeng@mail.buct.edu.cn

Highlights

• Hierarchical flower-like magnesium silicate hydrate microspheres were fabricated.

• Formation mechanism and adsorption behavior of microspheres has been investigated.

• Methyl orange removal follows CTAB, and methylene blue adsorption is related to Si.

Abstract

Hierarchical porous magnesium silicate hydrate (MSH) microspheres composed of sheets are successfully developed under facile conditions using a hard template. The role of hexadecyltrimethylammonium bromide (CTAB) on the formation and adsorption behavior was also observed for the methyl orange and methylene blue. The formed MSH possesses a surface area of 453.24 m²/g, an average pore size of 6.38 nm, and a pore volume of 0.75 cm³/g without CTAB. Based on the role of CTAB and the change in the ratio of Mg/Si, the MSH retained its sphere-like structure with a variation in pore parameters. The formed MSH was used as an adsorbent to remove methylene blue and methyl orange. The pseudo-second-order kinetic and Langmuir Isotherm models are well-fitted, with a 256.4 mg/g removal capacity and 84.2 mg/g for methylene blue and methyl orange, respectively. The modified MSH with CTAB played a positive role for the methyl orange and a negative role for the methylene blue regarding removal performance.

Graphical abstract

Keywords

Adsorption; Hierarchical microspheres; Magnesium silicate; Methyl orange; Methylene blue; Surface modification

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