Work

Identification of the structural characteristics, optical properties, and adsorption performance of Bi and Sn co-doped Co0.5Zn0.5Fe2O4 nanoparticles

Year: 2025

Type: article

Abstract: Highly effective techniques, such as adsorption, play an important role in removing hazardous pollutants from wastewater. Spinel ferrite nanoparticles have proven to be effective adsorbents for removing dyes from wastewater. Thus, the preparation, characterization, and application of (Co 0.5−x Zn 0.5−x Bi x Sn x )Fe 2 O 4 nanoparticles (0 ≤ x ≤ 0.1) as adsorbents for brilliant blue dye removal were reported in this study. The XRD analysis confirmed sample purity with minimal hematite phase. The synthesized nanoparticles exhibit spherical morphology, as revealed by SEM analysis. Additionally, EDX measurements revealed the successive substitution of the Co 2+ and Zn 2+ host ions by Bi 2+ and Sn 2+ dopants. UV–vis spectroscopy analysis yielded an increase in the direct and indirect bandgap energies upon co-doping. Among the prepared nanoparticles, the highest recombination rate was exhibited by (Co 0.5−x Zn 0.5−x Bi x Sn x )Fe 2 O 4 nanoparticles with x = 0.02, while the slowest recombination rate was observed for x = 0.04, as revealed from photoluminescence (PL) analysis. Adsorption experiments examined the effects of contact time, adsorbent dosage, pH, temperature, and initial dye concentration. Co-doped ferrite nanoparticles demonstrated efficient dye removal under various conditions. Kinetic and isotherm studies revealed a favourable adsorption process, following pseudo-second-order kinetics and best fitting the Freundlich isotherm. These findings highlight the potential of co-doped ferrite nanoparticles as effective adsorbents for wastewater treatment.

Source: South African Journal of Chemical Engineering

DOI: 10.1016/j.sajce.2025.05.011

Authors: Sajida Rmeid, Amani Aridi, Khulud Habanjar, Sherif G. Elsharkawy, Ramadan Awad

Institutions: Beirut Arab University, Modern University for Business and Science, Arab Academy for Science, Technology, and Maritime Transport, Pharos University in Alexandria, Alexandria University

Language: English

Topic: Adsorption and biosorption for pollutant removal

Subfield: Water Science and Technology

Field: Environmental Science

Domain: Physical Sciences

SDGs: Clean water and sanitation, Responsible consumption and production

Open Access status: gold

Estimated APC paid: $950