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Abstract <p>The metallic Pd nanoparticles were supported on the surface of ZnWO<sub>4</sub> nanorods to form heterojunction Pd/ZnWO<sub>4</sub> nanocomposites by microwave-assisted method using ethylene glycol as reducing regent. The phase, morphologies, atomic vibration, surface area and oxidation state of element of pure ZnWO<sub>4</sub> sample and heterojunction Pd/ZnWO<sub>4</sub> nanocomposites were characterized by X-ray diffraction (XRD), Fourier transform infrared spectroscopy (FTIR), Raman spectroscopy, BET surface area analysis, scanning electron microscopy (SEM), transmission electron microscopy (TEM) and X-ray photoelectron spectroscopy (XPS), respectively. The analytic results confirmed the formation of heterojunction between the face centered cubic (FCC) metallic Pd nanoparticles supported on surface of monoclinic ZnWO<sub>4</sub> nanorods. FTIR and Raman analysis of samples showed the stretching and bending of Zn–O–W, W–O, and Zn–O vibrations in ZnO<sub>6</sub> and WO<sub>6</sub> octahedron of ZnWO<sub>4</sub> lattices. The surface area of ZnWO<sub>4</sub> and heterojunction 5% Pd/ZnWO<sub>4</sub> nanocomposites were 10.47 and 6.09 m<sup>2</sup>/g. The effect of weight of Pd loading on surface of one-dimensional ZnWO<sub>4</sub> nanorods on photocatalytic degradation of rhodamine B under UV light irradiation has been studied and discussed in this research. It found that the heterojunction 5% Pd/ZnWO<sub>4</sub> nanocomposites showed the highest photocatalytic activity of 98.54% RhB degradation within 180 min under UV light irradiation due to reduce the recombination of photogenerated electron–hole pairs by formation Schottky barrier at the metal–semiconductor interface.</p>

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Preparation and Characterization of Metallic Pd Nanoparticles Supported on ZnWO4 Nanorods for Enhanced Photocatalytic Degradation of Rhodamine B Under UV Light Irradiation

  • 期刊论文

  • 发表日期：

    2025年8月3日

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  • Anukorn Phuruangrat,
  • Yothin Chimupala,
  • Budsabong Kuntalue,
  • Titipun Thongtem,
  • Somchai Thongtem

摘要

Abstract

The metallic Pd nanoparticles were supported on the surface of ZnWO4 nanorods to form heterojunction Pd/ZnWO4 nanocomposites by microwave-assisted method using ethylene glycol as reducing regent. The phase, morphologies, atomic vibration, surface area and oxidation state of element of pure ZnWO4 sample and heterojunction Pd/ZnWO4 nanocomposites were characterized by X-ray diffraction (XRD), Fourier transform infrared spectroscopy (FTIR), Raman spectroscopy, BET surface area analysis, scanning electron microscopy (SEM), transmission electron microscopy (TEM) and X-ray photoelectron spectroscopy (XPS), respectively. The analytic results confirmed the formation of heterojunction between the face centered cubic (FCC) metallic Pd nanoparticles supported on surface of monoclinic ZnWO4 nanorods. FTIR and Raman analysis of samples showed the stretching and bending of Zn–O–W, W–O, and Zn–O vibrations in ZnO6 and WO6 octahedron of ZnWO4 lattices. The surface area of ZnWO4 and heterojunction 5% Pd/ZnWO4 nanocomposites were 10.47 and 6.09 m2/g. The effect of weight of Pd loading on surface of one-dimensional ZnWO4 nanorods on photocatalytic degradation of rhodamine B under UV light irradiation has been studied and discussed in this research. It found that the heterojunction 5% Pd/ZnWO4 nanocomposites showed the highest photocatalytic activity of 98.54% RhB degradation within 180 min under UV light irradiation due to reduce the recombination of photogenerated electron–hole pairs by formation Schottky barrier at the metal–semiconductor interface.