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<p>The materials with three-dimensional periodic ordered macroporous structure plays an important role in the field of photocatalysis. In this study, Ag nanoparticle-decorated spherical TiO<sub>2</sub> inverse opal photonic crystals have been successfully prepared through the combination of the extraction-assisted micro-emulsion self-assembly and the wet-chemical method. After the decoration by Ag nanoparticles, the TiO<sub>2</sub> still maintains a spherical inverse opal microstructure and exhibits a reduced band gap width. The experimental results show that the Ag-decorated TiO<sub>2</sub> inverse opals have an improved photocatalytic activity compared to the pristine TiO<sub>2</sub> inverse opals. The photodegradation rate of methylene blue (MB) over the Ag-decorated TiO<sub>2</sub> inverse opals can reach 93.10% with the first-order reaction rate constant of 0.0463&#xa0;min<sup>− 1</sup>. Moreover, the photoelectrochemical performance of the samples confirms that the decoration of Ag nanoparticles can also effectively inhibit the recombination of photogenerated charges carries during the photocatalytic process.</p>

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Enhanced photocatalytic activity of spherical TiO2 inverse opal photonic crystals decorated by Ag nanoparticles

  • 期刊论文

  • 发表日期：

    2025年2月10日

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  • Cai-Xia Lei,
  • Xiao-Ming Liu,
  • Jian Han,
  • Bin-Bin Ma,
  • Liang-Yu Chen,
  • Hang Fu,
  • Jing-Jing Sun,
  • Juan Zuo,
  • Hou-An Zhang,
  • Gang-Sheng Zhang

摘要

The materials with three-dimensional periodic ordered macroporous structure plays an important role in the field of photocatalysis. In this study, Ag nanoparticle-decorated spherical TiO2 inverse opal photonic crystals have been successfully prepared through the combination of the extraction-assisted micro-emulsion self-assembly and the wet-chemical method. After the decoration by Ag nanoparticles, the TiO2 still maintains a spherical inverse opal microstructure and exhibits a reduced band gap width. The experimental results show that the Ag-decorated TiO2 inverse opals have an improved photocatalytic activity compared to the pristine TiO2 inverse opals. The photodegradation rate of methylene blue (MB) over the Ag-decorated TiO2 inverse opals can reach 93.10% with the first-order reaction rate constant of 0.0463 min− 1. Moreover, the photoelectrochemical performance of the samples confirms that the decoration of Ag nanoparticles can also effectively inhibit the recombination of photogenerated charges carries during the photocatalytic process.