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Fabrication of nanomagnetite/graphitic carbon nitride composite for adsorption and photo-Fenton decomposition of methylene blue dye

Year: 2025
Type: article
Abstract: Pollution caused by synthetic dyes is an urgent issue, necessitating the development of highly effective and environmentally friendly solid adsorbents and catalysts. Herien, nanomagnetite/graphitic carbon nitride composite (NgCN) was developed for the adsorption and photo-Fenton breakdown of methylene blue. The formed NgCN composite has low band gap energy (2.14 eV), high surface area of 94.9 m2/g, various chemical surface functional groups, and a TEM average particle size of 10 nm. The adsorption and Fenton approach were studied under several application circumstances. The Langmuir maximum adsorption capacity was verified by NgCN (80.65 mg/g) at pH = 6, and the adsorption was well-applied by Langmuir, Temkin, and Freundlich, as adsorption isotherm models. The kinetic experiments proved the application of nonlinear PSO and Elovich models, and 6 h is the optimum adsorption equilibrium time. The degradation data from Fenton and photo-Fenton show that NgCN is more effective than nanomagnetite (Ng) and graphitic carbon nitride (g-C3N4). Methylene blue breakdown exhibits 100% using NgCN catalyst under UV light at 40 °C, at 40 min of the catalytic activity. Kinetic and thermodynamics of MB decomposition by photo-Fenton verified the PFO, nonspontaneous, and endothermic catalytic procedure. Throughout eight photo-Fenton cycles, the reusability of NgCN declined by only 4.0%. The NgCN demonstrated significant dye adsorption and decomposition efficacy at varying pollutant concentrations. The fabricated material is a promising solid adsorbent as well as a photo-Fenton catalyst for the removal of organic pollutants.
DOI: 10.1007/s13762-025-06688-8
Language: English
Open Access status: hybrid
Estimated APC paid: $3,490
OpenAlex ID: W4413189080
FWCI: 1.536
Cites: 74
Cited by: 6
Related to: 10