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<p>This study focused on engineering WO<sub>3</sub>-doped ZnO/Bi<sub>2</sub>O<sub>3</sub> nanocomposites (NCs) through a one-step biosynthesis process using Musa acuminata epicarp extract. XRD, TEM, SEM with EDX, XPS, FTIR, UV-Vis, PL, and Zeta-sizer spectroscopy were used to assess the physicochemical properties of the obtained NPs and NCs. In the present work, the prepared samples have also been improved for their photocatalytic and cytotoxicity activities. XRD data indicate the successful formation of a heterostructure with good crystallinity, with a decreasing of crystallite size from 26.14 ± 2.1&#xa0;nm to 8.11 ± 1.1&#xa0;nm after the addition of WO<sub>3</sub> and ZnO. TEM and SEM with elemental mapping analysis revealed the morphologies, including a spherical shape and uniform distribution, of the produced samples. XPS and EDX spectra confirmed the presence of the composition of elements (Bi, Zn, W, and O) in WO<sub>3</sub>-doped ZnO/Bi<sub>2</sub>O<sub>3</sub> NCs. FTIR analysis revealed an identical functional group in the synthesized samples. The optical properties of the samples were studied using UV-Vis and photoluminescence (PL) spectroscopy. Moreover, it showed the reduction of recombination between electrons(e<sup>−</sup>) in VB and holes (h<sup>+</sup>) in CB of Bi<sub>2</sub>O<sub>3</sub>. Zeta-sizer analysis showed that the WO<sub>3</sub> doping into ZnO/Bi<sub>2</sub>O<sub>3</sub> NCs played a role in enhanced uniformity of particle distribution and reduced particle aggregation. Photocatalytic activity test revealed that the prepared WO<sub>3</sub>-doped ZnO/Bi<sub>2</sub>O<sub>3</sub> NCs have superior photodegradation of phenol dye (92.11%) compared with both ZnO/Bi<sub>2</sub>O<sub>3</sub> NCs (83.00%) and Bi<sub>2</sub>O<sub>3</sub> NPs (52.21%), respectively. Biological response showed that the cell viability of MCF-7 cells using synthesized WO<sub>3</sub>-doped ZnO/Bi<sub>2</sub>O<sub>3</sub> NCs was higher than 50% at a low concentration of 100&#xa0;µg/ml. This result indicated that the WO<sub>3</sub>-doped ZnO/Bi<sub>2</sub>O<sub>3</sub> NCs are non-toxic at lower concentrations. This study highlighted that the WO<sub>3</sub>-doped ZnO/Bi<sub>2</sub>O<sub>3</sub> NCs could be applied in therapeutic applications, particularly in vivo models.</p>

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Optimization of Photocatalytic and Anti-cancer Activities of WO3-Doped ZnO/Bi2O3 Nanocomposites Prepared Using One-Step Biosynthesis

  • 期刊论文

  • 发表日期：

    2025年6月25日

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  • ZabnAllah M. Alaizeri,
  • Amirah S. Alahmari,
  • Faiz A. AL-aizari,
  • Maqusood Ahamed,
  • Hisham A. Alhadlaq

摘要

This study focused on engineering WO3-doped ZnO/Bi2O3 nanocomposites (NCs) through a one-step biosynthesis process using Musa acuminata epicarp extract. XRD, TEM, SEM with EDX, XPS, FTIR, UV-Vis, PL, and Zeta-sizer spectroscopy were used to assess the physicochemical properties of the obtained NPs and NCs. In the present work, the prepared samples have also been improved for their photocatalytic and cytotoxicity activities. XRD data indicate the successful formation of a heterostructure with good crystallinity, with a decreasing of crystallite size from 26.14 ± 2.1 nm to 8.11 ± 1.1 nm after the addition of WO3 and ZnO. TEM and SEM with elemental mapping analysis revealed the morphologies, including a spherical shape and uniform distribution, of the produced samples. XPS and EDX spectra confirmed the presence of the composition of elements (Bi, Zn, W, and O) in WO3-doped ZnO/Bi2O3 NCs. FTIR analysis revealed an identical functional group in the synthesized samples. The optical properties of the samples were studied using UV-Vis and photoluminescence (PL) spectroscopy. Moreover, it showed the reduction of recombination between electrons(e−) in VB and holes (h+) in CB of Bi2O3. Zeta-sizer analysis showed that the WO3 doping into ZnO/Bi2O3 NCs played a role in enhanced uniformity of particle distribution and reduced particle aggregation. Photocatalytic activity test revealed that the prepared WO3-doped ZnO/Bi2O3 NCs have superior photodegradation of phenol dye (92.11%) compared with both ZnO/Bi2O3 NCs (83.00%) and Bi2O3 NPs (52.21%), respectively. Biological response showed that the cell viability of MCF-7 cells using synthesized WO3-doped ZnO/Bi2O3 NCs was higher than 50% at a low concentration of 100 µg/ml. This result indicated that the WO3-doped ZnO/Bi2O3 NCs are non-toxic at lower concentrations. This study highlighted that the WO3-doped ZnO/Bi2O3 NCs could be applied in therapeutic applications, particularly in vivo models.