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<p>The tin oxide based nanoparticles with diverse properties gained significant attention due to their potential applications such as waste water management. The present study demonstrates efficient utilization of <i>Coleus amboinicus</i> leaf extract as a green medium without the addition of any external capping agents for the synthesis of SnO<sub>2</sub> and Ni doped SnO<sub>2</sub> nanoparticles for catalytic reduction of methylene blue dye in the presence of NaBH<sub>4</sub>. The different characterization techniques such as XRD, Raman, FTIR, XPS, SEM, EDS and TEM confirms the formation of tetragonal rutile structure of SnO<sub>2</sub>, reveals the surface features of the prepared nanocatalyst and its catalytic activity. The effect of Ni doping on structural, morphological, optical and catalytic properties of SnO<sub>2</sub> nanoparticles were investigated. The present work reports the excellent methylene blue degradation capability of Ni doped SnO<sub>2</sub> nanoparticles in presence of sodium borohydride. The 2% nickel doped SnO<sub>2</sub> nanoparticles exhibit better catalytic performance compared with other samples, by completing the degradation process of methylene blue dye within 10 min with 99.7% conversion efficiency. Moreover, the kinetic studies reveals that the degradation follow a pseudo first order kinetics with a rate constant of 0.4809 min<sup>-1</sup>. This approach provides a simple, cost-effective, and environment friendly way to synthesize an efficient catalyst, addressing the limitations of colloidal synthesis.</p> Graphical Abstract <p></p>

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Coleus amboinicus leaf extract mediated sol-gel synthesis of NixSn1-xO2 (x = 0.02, 0.04 and 0.06): Catalytic Studies

  • 期刊论文

  • 发表日期：

    2025年8月19日

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  • Abhirami N,
  • S. Dhivya Dharshini,
  • Manju V,
  • Jolly Bose R,
  • Sreeja Sreedharan R

摘要

The tin oxide based nanoparticles with diverse properties gained significant attention due to their potential applications such as waste water management. The present study demonstrates efficient utilization of Coleus amboinicus leaf extract as a green medium without the addition of any external capping agents for the synthesis of SnO2 and Ni doped SnO2 nanoparticles for catalytic reduction of methylene blue dye in the presence of NaBH4. The different characterization techniques such as XRD, Raman, FTIR, XPS, SEM, EDS and TEM confirms the formation of tetragonal rutile structure of SnO2, reveals the surface features of the prepared nanocatalyst and its catalytic activity. The effect of Ni doping on structural, morphological, optical and catalytic properties of SnO2 nanoparticles were investigated. The present work reports the excellent methylene blue degradation capability of Ni doped SnO2 nanoparticles in presence of sodium borohydride. The 2% nickel doped SnO2 nanoparticles exhibit better catalytic performance compared with other samples, by completing the degradation process of methylene blue dye within 10 min with 99.7% conversion efficiency. Moreover, the kinetic studies reveals that the degradation follow a pseudo first order kinetics with a rate constant of 0.4809 min-1. This approach provides a simple, cost-effective, and environment friendly way to synthesize an efficient catalyst, addressing the limitations of colloidal synthesis.

Graphical Abstract