Hydrothermal synthesis of cobalt substitute zinc-ferrite (Co1-xZnxFe2O4) nanodot, functionalised by polyaniline with enhanced photocatalytic activity under visible light irradiation

Bashar, Md Abul; Molla, Md. Tamzid Hossain; Chandra, Dipesh; Malitha, Md Dipu; Islam, Md Sumon; Rahman, M. Safiur; Ahsan, Md. Shameem

doi:10.1016/j.heliyon.2023.e15381

Cited by 17 publications

(1 citation statement)

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“…possess suitable bandgap energies in the visible range along with versatile catalytic, electrical, and magnetic properties (Dastjerdi et al, 2023). Doping with metals such as Cobalt allows tuning of the optical bandgap as well as enhances the separation and mobility of photogenerated charge carriers in the crystal lattice of ferrites, thereby improving their photocatalytic efficiency (Bashar et al, 2023;Danila et al, 2023;Mikhaylov et al, 2022;Verma et al, 2022).…”

Section: Introductionmentioning

confidence: 99%

Photocatalytic degradation of Congo red dye with cobalt-doped manganese aluminium ferrite nanoparticles

Yasar,

Noreen

2024

Preprint

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Water pollution caused by the discharge of dyes is a serious environmental problem worldwide.Cobalt-doped manganese aluminium ferrite CoXMn1-XAl0.2Fe1.8O4 (X=0,0.2) nanoparticles synthesized via the sol-gel combustion technique exhibited excellent photocatalytic activity for Congo Red dye degradation under visible light irradiation. Comprehensive materials characterization revealed their structural, optical, morphological, and electronic properties. XRD reveals a cubic spinal ferrite structure, FTIR shows cobalt incorporation, SEM shows nanoparticle morphology, EDX confirms stoichiometric composition, and BET analysis reveals a high surface area. Cobalt incorporation tunes the optical bandgap from 2.8 to 2.5 eV, enabling visible light absorption (UV-DRS). Dielectric and conductivity measurements confirm semiconductor behaviour and indicate cobalt doping introduces additional charge carriers. Cobalt-doped manganese aluminium ferrite exhibited excellent Congo Red dye photodegradation efficiency of 99.9% under normal conditions of pH 7, catalyst dose of 100 mg/L, and dye concentration of 10 ppm following first-order kinetics. Scavenger test observed Hydroxyl and superoxide radicals degrade dyes. Cobalt doping facilitates charge dynamics, narrowing the bandgap and enhancing interfacial charge transfer, leading to superior photocatalytic performance. Cobalt-doped ferrite nanoparticles are reusable. Cobalt-doped manganese aluminium ferrite is an efficient and stable photocatalyst for wastewater treatment.

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