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<p>Silicon dioxide/graphene oxide/aluminum oxide (SiO<sub>2</sub>/GO/Al<sub>2</sub>O<sub>3</sub>) nanocomposite was prepared for the ciprofloxacin (CPF) drug adsorption. The characterization techniques involving field-emission-scanning-electron-microscopy (FE-SEM) determined the topography of the nanocomposite and high resolution transmission electron microscopy (HR-TEM) determined the particle size for SiO<sub>2</sub>/GO/Al<sub>2</sub>O<sub>3</sub>. The EDX confirmed the elemental composition of the materials incorporated, while the X-RD analysis inferred the crystalline nature of SiO<sub>2</sub>/GO/Al<sub>2</sub>O<sub>3</sub>. The FT-IR analysis showcased the role of the capping groups involved. The present study focuses on the adsorption of ciprofloxacin (CPF) drug onto SiO<sub>2</sub>/GO/Al<sub>2</sub>O<sub>3</sub> regarding kinetics, isotherm, thermodynamics studies, and factors, such as solution pH, temperature, concentration, and time. The outcome showed that the highest adsorption of CPF was observed onto the SiO<sub>2</sub>/GO/Al<sub>2</sub>O<sub>3</sub> composite at pH 6.0. Similarly, the utmost adsorptive capacity of 499.44&#xa0;mg&#xa0;g<sup>−1</sup> was achieved in 180&#xa0;min and 500 mgL<sup>−1</sup> CPF solution concentration. The CPF uptake on SiO<sub>2</sub>/GO/Al<sub>2</sub>O<sub>3</sub> was in coordination with the pseudo-second-order equation and Langmuir isotherm, respectively. The thermodynamic parameters ciphered that the uptake of the CPF drug was spontaneous. The drug was easily desorbed using 0.1&#xa0;M (aq) ethanol solution for six adsorption–desorption cycles.</p>

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Synthesis and characterization of SiO2/GO/Al2O3 nanocomposite adsorbent for the uptake of ciprofloxacin: isothermal and reusability studies

  • 期刊论文

  • 发表日期：

    2025年1月7日

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  • Prerna Higgins,
  • Rajeev Kumar,
  • Shaziya H. Siddiqui

摘要

Silicon dioxide/graphene oxide/aluminum oxide (SiO2/GO/Al2O3) nanocomposite was prepared for the ciprofloxacin (CPF) drug adsorption. The characterization techniques involving field-emission-scanning-electron-microscopy (FE-SEM) determined the topography of the nanocomposite and high resolution transmission electron microscopy (HR-TEM) determined the particle size for SiO2/GO/Al2O3. The EDX confirmed the elemental composition of the materials incorporated, while the X-RD analysis inferred the crystalline nature of SiO2/GO/Al2O3. The FT-IR analysis showcased the role of the capping groups involved. The present study focuses on the adsorption of ciprofloxacin (CPF) drug onto SiO2/GO/Al2O3 regarding kinetics, isotherm, thermodynamics studies, and factors, such as solution pH, temperature, concentration, and time. The outcome showed that the highest adsorption of CPF was observed onto the SiO2/GO/Al2O3 composite at pH 6.0. Similarly, the utmost adsorptive capacity of 499.44 mg g−1 was achieved in 180 min and 500 mgL−1 CPF solution concentration. The CPF uptake on SiO2/GO/Al2O3 was in coordination with the pseudo-second-order equation and Langmuir isotherm, respectively. The thermodynamic parameters ciphered that the uptake of the CPF drug was spontaneous. The drug was easily desorbed using 0.1 M (aq) ethanol solution for six adsorption–desorption cycles.