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Abstract <p>In this study, for the first time, an aqueous extract of <i>Uncaria tomentosa</i> was employed for the green synthesis of TiO<sub>2</sub> nanoparticles (TiO<sub>2</sub> NPs). The synthesized nanoparticles were characterized using Scanning electron microscopy (SEM), UV–Visible spectroscopy, Fourier Transform Infrared spectroscopy (FT-IR), and X-ray diffraction (XRD). SEM shows evidence of the formation of TiO<sub>2</sub> NPs. XRD analysis revealed that the nanoparticles exhibited a crystalline structure corresponding to the anatase phase. The FT-IR spectrum showed transmittance bands at approximately 641 and 655&#xa0;cm<sup>−1</sup> for samples T1 (extract:TTIP ratio 1:10) and T2 (extract:TTIP ratio 1:7), which are attributed to Ti–O–Ti stretching vibrations. Furthermore, the optical band-gap energies were determined to be 3.38&#xa0;eV and 3.43&#xa0;eV for T1 (extract:TTIP ratio 1:10) and T2 (extract:TTIP ratio 1:7), respectively.</p> Graphical abstract <p></p>

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Green synthesis and characterization of TiO2 nanoparticles using the aqueous extract of Uncaria tomentosa

  • 期刊论文

  • 发表日期：

    2025年12月24日

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  • Leslie Carolina Aguilar-Vargas,
  • Alejandra Carreon-Alvarez,
  • Clara de la Luz Carreon-Alvarez,
  • Mariana Díaz-Zaragoza,
  • David Omar Oseguera-Galindo,
  • Ma. Luisa Ojeda M.,
  • Miriam M. Tostado-Plascencia,
  • Marciano Sanchez-Tizapa

摘要

Abstract

In this study, for the first time, an aqueous extract of Uncaria tomentosa was employed for the green synthesis of TiO2 nanoparticles (TiO2 NPs). The synthesized nanoparticles were characterized using Scanning electron microscopy (SEM), UV–Visible spectroscopy, Fourier Transform Infrared spectroscopy (FT-IR), and X-ray diffraction (XRD). SEM shows evidence of the formation of TiO2 NPs. XRD analysis revealed that the nanoparticles exhibited a crystalline structure corresponding to the anatase phase. The FT-IR spectrum showed transmittance bands at approximately 641 and 655 cm−1 for samples T1 (extract:TTIP ratio 1:10) and T2 (extract:TTIP ratio 1:7), which are attributed to Ti–O–Ti stretching vibrations. Furthermore, the optical band-gap energies were determined to be 3.38 eV and 3.43 eV for T1 (extract:TTIP ratio 1:10) and T2 (extract:TTIP ratio 1:7), respectively.

Graphical abstract