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<p>The poriferous TiO<sub>2</sub> micro-tablet (PTM) can enhance absorption in visible light spectrum by incorporating Ag nanoparticles (NPs) on its surface via a simple and cost-effective photoreduction process of Ag precursor. The Ag NP content on the TiO<sub>2</sub> PTM surface plays critical role in enhancing the photoelectrochemical (PEC) water-splitting performance driven by surface plasmons resulting from Ag nanoparticles. The Ag/TiO<sub>2</sub> PTM exhibits exceptional photoelectrochemical (PEC) water-splitting performance when illuminated with a solar simulator due to the surface plasmon resonance (SPR) of Ag NPs. Optimum performance was achieved when the concentration of AgNO<sub>3</sub> precursor was set at 1 × 10<sup>−4</sup> M. This concentration exhibited a significantly higher photocurrent density of 0.508 mAcm<sup>−2</sup> at 1.23&#xa0;V vs. RHE under AM 1.5G illumination, marking a fivefold increase compared to pristine TiO<sub>2</sub> PTM. The plasmonic interaction between Ag NPs and TiO<sub>2</sub> PTM led to enhanced adsorption within the visible region due to surface plasmon resonance (SPR) and increased charge carrier transfer efficiency facilitated by the presence of Ag NPs on the TiO<sub>2</sub> matrix. The current density improvement is due to the enhancement of visible light absorption, SPR effect, and efficient electron-hole separation. This research offers a viable strategy for fabricating a novel type of TiO<sub>2</sub> hybrid nanostructure with plasmonic enhancement for PEC water splitting.</p>

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Silver-decorated titanium dioxide micro-tablets as a photocatalyst for oxygen evolution reaction

  • 期刊论文

  • 发表日期：

    2025年1月21日

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  • L. Roza,
  • G. E. Timuda,
  • E. R. Mawarnis,
  • R. Miranti,
  • A. Wafi,
  • T. Sudiro,
  • N. Darsono,
  • Sudiyarmanto,
  • M. Y.A. Rahman

摘要

The poriferous TiO2 micro-tablet (PTM) can enhance absorption in visible light spectrum by incorporating Ag nanoparticles (NPs) on its surface via a simple and cost-effective photoreduction process of Ag precursor. The Ag NP content on the TiO2 PTM surface plays critical role in enhancing the photoelectrochemical (PEC) water-splitting performance driven by surface plasmons resulting from Ag nanoparticles. The Ag/TiO2 PTM exhibits exceptional photoelectrochemical (PEC) water-splitting performance when illuminated with a solar simulator due to the surface plasmon resonance (SPR) of Ag NPs. Optimum performance was achieved when the concentration of AgNO3 precursor was set at 1 × 10−4 M. This concentration exhibited a significantly higher photocurrent density of 0.508 mAcm−2 at 1.23 V vs. RHE under AM 1.5G illumination, marking a fivefold increase compared to pristine TiO2 PTM. The plasmonic interaction between Ag NPs and TiO2 PTM led to enhanced adsorption within the visible region due to surface plasmon resonance (SPR) and increased charge carrier transfer efficiency facilitated by the presence of Ag NPs on the TiO2 matrix. The current density improvement is due to the enhancement of visible light absorption, SPR effect, and efficient electron-hole separation. This research offers a viable strategy for fabricating a novel type of TiO2 hybrid nanostructure with plasmonic enhancement for PEC water splitting.