Spindle-shaped AgFeO₂ nanoparticles for efficient removal of cationic and anionic dyes

Abstract

In this study, the adsorption capacity of AgFeO₂ nanoparticles toward cationic dye, Basic Violet-14 (BV-14) and anionic dye, Acid Blue-74 (AB-74) was investigated. The co-precipitation method was used to prepare spindle-shaped AgFeO₂ nanoparticles. The adsorbent was characterized by X-Ray Diffraction (XRD), High-Resolution Transmission Electron Microscopy (HRTEM), Fourier Transform Infrared Spectroscopy (FTIR), BET analysis etc. The adsorbent provides quick and efficient adsorption of dyes with a maximum adsorption capacity of 56.44 ± 0.5 mg g⁻¹ for AB-74 at neutral pH and 78.01 ± 0.3 mg g⁻¹ for BV-14 at pH 9 in 30 min. The adsorption data of AB-74 and BV-14 were well described by the Langmuir isotherm model and maximum adsorption capacities (59.17 mg g⁻¹ and 82.64 mg g⁻¹ respectively) were found to be in agreement with experimental values. The adsorption kinetics followed the pseudo-second-order model and the thermodynamic parameters indicated the spontaneous and endothermic nature of the adsorption process. The obtained results suggest that AgFeO₂ can be an effective adsorbent for cationic and anionic dyes.

Graphical Abstract

TOPICAL HEADING:

• Separations: materials
• devices and processes

Keywords:

• AgFeO₂ nanoparticles
• dye
• basic violet-14
• acid blue-74
• adsorption
• isotherm modeling

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Acknowledgement

The authors acknowledge the National Centre for Nanoscience & Nanotechnology, University of Mumbai, SAIF, IIT –Bombay, IIT-Madras and Lovely Professional University, Jalandhar for extending instrumental support.

Disclosure statement

No potential conflict of interest was reported by the authors.

Additional information

Funding

This work was financially supported by Changu Kana Thakur Arts, Commerce and Science College, New Panvel under RUSA Grant.