β-Cyclodextrin carbon-based nanoparticles with a core–shell–shell structure for efficient adsorption of crystal violet and bisphenol A--颗粒学报PARTICUOLOGY

Tian, T., Liu, M., Li, Y., Han, J., Ren, L., Lorenz, H., . . . Chen, J. (2022). β-Cyclodextrin carbon-based nanoparticles with a core–shell–shell structure for efficient adsorption of crystal violet and bisphenol A. Particuology, 62, 88-97. https://doi.org/10.1016/j.partic.2021.04.004

β-Cyclodextrin carbon-based nanoparticles with a core–shell–shell structure for efficient adsorption of crystal violet and bisphenol A

Tian Tian a, Mengling Liu b, Yinhui Li a, Jian Han a, Liang Ren a, Heike Lorenz c, Qing Wu d *, Jianxin Chen a *

a School of Chemical Engineering and Technology, Hebei University of Technology, Tianjin 300130, China
b MDPI (Tianjin) Technology Services Co., Ltd., Tianjin 300130, China
c Max-Planck-Institut für Dynamik komplexer technischer Systeme, Sandtorstrasse 1, 39106 Magdeburg, Germany
d School of Artificial Intelligence, Hebei University of Technology, Tianjin 300130, China

10.1016/j.partic.2021.04.004

Volume 62, March 2022, Pages 88-97

Received 28 January 2021, Revised 2 April 2021, Accepted 5 April 2021, Available online 4 May 2021, Version of Record 17 November 2021.

E-mail: wuqing@scse.hebut.edu.cn; chjx2000@126.com

Highlights

• CS/SiO₂@β-CD with core–shell structure was prepared successfully.

• The adsorption amount of CV increased nearly fourfold.

• The adsorption thermodynamics of CV and BPA were studied.

• The adsorption of CV and BPA was physical adsorption process.

Abstract

Textile wastewater contains highly toxic, nondegradable, carcinogenic organic pollutants, causing severe damage to the ecological environment. In this work, β-cyclodextrin carbon-sphere-based nanocomposite (CS/SiO₂@β-CD) with a core–shell–shell configuration was prepared by hydrothermal synthesis and subsequent sedimentation-azeotropic distillation with SiO₂ as intermediate layer for the removal of crystal violet (CV) and bisphenol A (BPA). The chemical structure and morphology of the CS/SiO₂@β-CD were characterized by FT-IR, SEM and TEM. The effects of contact time, pH, temperature and initial concentration of the absorbates on the adsorption property were explored. The CS/SiO₂@β-CD showed excellent adsorption capacity on CV and BPA, and the maximum adsorption capacity was 87.873 mg g–1 and 165.095 mg g–1, respectively. Their adsorption process was in line with the pseudo-second-order and pseudo-first-order kinetic models, respectively. The adsorption thermodynamics could be better fitted by Langmuir model than by Freundlich model. The calculated thermodynamic parameters (–ΔG₀, ΔS₀ and ΔH₀) illustrated the adsorption of CV was endothermic, in contrast, the adsorption of BPA was exothermic process. Furthermore, the CS/SiO₂@β-CD showed excellent recovery performance, making it a potential adsorbent for the practical treatment of textile wastewater.

Graphical abstract

Keywords

Cyclodextrin; Adsorption; Textile wastewater; Kinetic and thermodynamic models

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