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<p>The current study aimed to synthesize green Co<sub>3</sub>O<sub>4</sub> nanoparticles using leaf extract of <i>Butea monosperma</i>. Different analytical techniques like XRD, FT-IR and TEM were employed to characterize the synthesized nanoparticles. The optical properties were determined by using UV–visible spectroscopy. The green synthesized nanoparticles were further examined for the photocatalytic degradation of cationic Rhodamine B (RB) dye. Various operational parameters like irradiation time, initial dye concentration, catalyst dose, and pH affecting the degradation efficiency were evaluated and optimized. The synthesized GCo<sub>3</sub>O<sub>4</sub> NPs have shown excellent photocatalytic activity (96.2%) against RB dye at optimized conditions. The study has followed Langmuir–Hinshelwood reactions kinetics with a rate constant of 0.018&#xa0;min<sup>−1</sup>(R<sup>2</sup> = 0.961). Moreover, GCo<sub>3</sub>O<sub>4</sub> has revealed good reusability for three consecutive degradation cycles. These analyses showed that GCo<sub>3</sub>O<sub>4</sub> proved to be an efficient, environmentally friendly and promising material for the decomposition of dye in aqueous medium.</p>

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Accelerating photocatalytic degradation of Rhodamine B dyeby green synthesized cobalt-oxide nanoparticles using Buteamono sperma leaf extract

  • 期刊论文

  • 发表日期：

    2025年4月16日

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  • Nimisha Jadon,
  • Naorem Nanda Singh,
  • Puja Tomar,
  • Bilal Ahmad Bhat,
  • Laxmi Dubey

摘要

The current study aimed to synthesize green Co3O4 nanoparticles using leaf extract of Butea monosperma. Different analytical techniques like XRD, FT-IR and TEM were employed to characterize the synthesized nanoparticles. The optical properties were determined by using UV–visible spectroscopy. The green synthesized nanoparticles were further examined for the photocatalytic degradation of cationic Rhodamine B (RB) dye. Various operational parameters like irradiation time, initial dye concentration, catalyst dose, and pH affecting the degradation efficiency were evaluated and optimized. The synthesized GCo3O4 NPs have shown excellent photocatalytic activity (96.2%) against RB dye at optimized conditions. The study has followed Langmuir–Hinshelwood reactions kinetics with a rate constant of 0.018 min−1(R2 = 0.961). Moreover, GCo3O4 has revealed good reusability for three consecutive degradation cycles. These analyses showed that GCo3O4 proved to be an efficient, environmentally friendly and promising material for the decomposition of dye in aqueous medium.