Decolorization of Reactive Black 5 dye using gel combustion synthesized LaFeO3 nanoparticles

Arif Aizat, Farhana Aziz, Mohd Zamri Mohd Yusop, Juhana Jaafar, Norhaniza Yusof, Wan Norhayati Wan Salleh, Ahmad Fauzi Ismail

Abstract


Lanthanum orthoferrite (LaFeO3) nanoparticles was prepared via gel combustion method with fixed reaction temperature at 200°C, but different reaction time of (t) 2 hours (t=2h) and 24 hours (t=24h), respectively. Physicochemical properties' characterization was performed to compare both samples. UV-Vis spectroscopy analysis was done to determine the photocatalytic performance on Reactive Black 5 (RB5) dye. LaFeO3(t=24h) possessed a high crystallinity structure with specific surface area (SSA) of 28.037 m2g-1, while LaFeO3(t=2h) had a mixture of crystalline and amorphous structures with SSA of 40.952 m2g-1. The catalysts’ loading was also varied in a few conditions to elucidate the optimum loading that maximize the dye removal by mean of adsorption-photocatalytic action. Up to 94% of RB5 dye was successfully removed within 6h by LaFeO3(t=2h) samples, and this enhanced synergistic activity of LaFeO3 is promising for the further application of visible light driven photocatalyst in polluted water treatment.

Keywords


Lanthanum orthoferrite, Combustion method, Reaction time, Photocatalysis, Dye degradation

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DOI: https://doi.org/10.11113/mjfas.v15n3.1459

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