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Synthesis and characterisation of TIO2/FE2O3 green composites co-doped on go and to study its photocatalytic degradation on methylene blue and Carbol fuchsin dyes

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Abstract

The environmentally friendly synthesis of GO-TiO2/Fe2O3 nanocomposites were synthesized using Moringa oleifera seed extract as a reducing agent. GO (graphene oxide) was prepared with the Hummer’s method and TiO2 and Fe2O3 were co-doped onto the graphene surface through ultrasonication. Structural characteristics were determined via X-ray diffraction (XRD), surface morphology analyzed with field emission scanning electron microscopy (FESEM) and High-Resolution Transmission Electron Microscopy (HRTEM), and vibrational modes identified using Raman spectroscopy. Optical properties were assessed using UV–VIS and Photoluminescence techniques, while the presence of elements was confirmed with Fourier Transform Infrared Spectroscopy (FTIR) and energy dispersive spectroscopy (EDS). Porosity and surface area were determined through nitrogen adsorption and desorption via BET studies. The NC Fe3 nanocomposite featured a crystalline size of 20 nm, a high surface area of 75 m2/g, a 2.75 eV bandgap energy, and an 8.6 nm particle size distribution. The d-spacing values from HRTEM and XRD analyses matched. Notably, under UV light for 90 min, the photocatalytic degradation of methylene blue (MB) reached 85%, exhibiting pseudo-first-order kinetics with a rate constant of 0.009 min−1 and a correlation coefficient of 0.9853. Similarly, the photocatalytic degradation of Carbol Fuchsin (CF) achieved 90% under UV light for 90 min, with pseudo-first-order kinetics characterized by a rate constant of 0.01064365 min−1 and a correlation coefficient of 0.9923.

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  1. Department of Physics, PSG College of Arts and Science, Coimbatore, 641014, India

    S. Saranya & M. Rajkumar

  2. Centre for Nanotechnology, AMET University, Chennai, 603112, India

    V. Rajendran

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Mrs. SS: Conceptualization, Formal analysis, Writing—original draft. Dr. MR: Supervision. Dr. VR: Visualization.

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Saranya, S., Rajkumar, M. & Rajendran, V. Synthesis and characterisation of TIO2/FE2O3 green composites co-doped on go and to study its photocatalytic degradation on methylene blue and Carbol fuchsin dyes. J Mater Sci: Mater Electron 34, 2298 (2023). https://doi.org/10.1007/s10854-023-11675-1

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