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Effective Poly (Cyclotriphosphazene-Co-4,4′-Sulfonyldiphenol)@rGO Sheets for Tetracycline Adsorption: Fabrication, Characterization, Adsorption Kinetics and Thermodynamics

1
State Key Laboratory of Organic–Inorganic Composites, Beijing University of Chemical Technology, Beijing 100029, China
2
Department of Mechanical Engineering, City University of Hong Kong, Kowloon, Hong Kong, China
3
Department of Chemistry, The University of Hong Kong, Pokfulam, Hong Kong, China
4
Department of Chemistry, Faculty of Science, King Khalid University, Abha 61413, Saudi Arabia
5
Guangdong Provincial Key Laboratory of Soil and Ground Water Pollution Control, School of Environmental Science and Technology, Southern University of Science and Technology, Shenzhen 518055, China
*
Author to whom correspondence should be addressed.
Muhammad Ahmad and Tehseen Nawaz contributed equally in this work.
Academic Editor: Abdelhamid Elaissari
Nanomaterials 2021, 11(6), 1540; https://doi.org/10.3390/nano11061540
Received: 20 May 2021 / Revised: 3 June 2021 / Accepted: 5 June 2021 / Published: 11 June 2021
The development of excellent drug adsorbents and clarifying the interaction mechanisms between adsorbents and adsorbates are greatly desired for a clean environment. Herein, we report that a reduced graphene oxide modified sheeted polyphosphazene (rGO/poly (cyclotriphosphazene-co-4,4′-sulfonyldiphenol)) defined as PZS on rGO was used to remove the tetracycline (TC) drug from an aqueous solution. Compared to PZS microspheres, the adsorption capacity of sheeted [email protected] exhibited a high adsorption capacity of 496 mg/g. The adsorption equilibrium data well obeyed the Langmuir isotherm model, and the kinetics isotherm was fitted to the pseudo-second-order model. Thermodynamic analysis showed that the adsorption of TC was an exothermic, spontaneous process. Furthermore, we highlighted the importance of the surface modification of PZS by the introduction of rGO, which tremendously increased the surface area necessary for high adsorption. Along with high surface area, electrostatic attractions, H-bonding, π-π stacking and Lewis acid-base interactions were involved in the high adsorption capacity of [email protected] Furthermore, we also proposed the mechanism of TC adsorption via [email protected] View Full-Text
Keywords: reduced graphene oxide; adsorption; tetracycline; thermodynamics reduced graphene oxide; adsorption; tetracycline; thermodynamics
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MDPI and ACS Style

Ahmad, M.; Nawaz, T.; Alam, M.M.; Abbas, Y.; Ali, S.; Imran, M.; Zhang, S.; Wu, Z. Effective Poly (Cyclotriphosphazene-Co-4,4′-Sulfonyldiphenol)@rGO Sheets for Tetracycline Adsorption: Fabrication, Characterization, Adsorption Kinetics and Thermodynamics. Nanomaterials 2021, 11, 1540. https://doi.org/10.3390/nano11061540

AMA Style

Ahmad M, Nawaz T, Alam MM, Abbas Y, Ali S, Imran M, Zhang S, Wu Z. Effective Poly (Cyclotriphosphazene-Co-4,4′-Sulfonyldiphenol)@rGO Sheets for Tetracycline Adsorption: Fabrication, Characterization, Adsorption Kinetics and Thermodynamics. Nanomaterials. 2021; 11(6):1540. https://doi.org/10.3390/nano11061540

Chicago/Turabian Style

Ahmad, Muhammad; Nawaz, Tehseen; Alam, Mohammad M.; Abbas, Yasir; Ali, Shafqat; Imran, Muhammad; Zhang, Shuangkun; Wu, Zhanpeng. 2021. "Effective Poly (Cyclotriphosphazene-Co-4,4′-Sulfonyldiphenol)@rGO Sheets for Tetracycline Adsorption: Fabrication, Characterization, Adsorption Kinetics and Thermodynamics" Nanomaterials 11, no. 6: 1540. https://doi.org/10.3390/nano11061540

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