Ultra-low Au–Pt Co-decorated TiO2 nanotube arrays: Construction and its improved visible-light-induced photocatalytic properties

Xiuru Yang, Zhi Chen, Dantong Zhou, Wan Zhao, Xiaoxiao Qian, Qian Yang, Tao Sun, Cai Shen

Research output: Journal PublicationArticlepeer-review

20 Citations (Scopus)

Abstract

Highly ordered TiO2 nanotube arrays (TNTAs) have been controllably prepared by anodizing Ti foils and been used as the support for co-depositing noble Au–Pt quantum dots (QDs) with good dispersion. Well dispersed Au–Pt nanoparticles around 5 nm have been simultaneously deposited on the TNTAs through a facilely simultaneous photo-irradiation-reduction method. The prepared samples have been well-characterized by SEM, TEM, XRD, XPS, UV–Vis and EC-AFM methods. The photo-degradation of Rh B under visible light (with a 420 nm cutoff) has been used as a model response to characterize the photocatalytic properties of the prepared samples; and the co-decorated Au–Pt/TNTAs show a remarkable enhancement of visible-light-driven photocatalytic properties with good stability. This shows that the co-decorated Au–Pt quantum dots could effectively utilize the visible light and suppress the recombination of electron-hole pair, although the loaded amount is ultra-low, which induces an optimized photocatalytic activity under visible light.

Original languageEnglish
Article number110065
JournalSolar Energy Materials and Solar Cells
Volume201
DOIs
Publication statusPublished - Oct 2019
Externally publishedYes

Keywords

  • Au–Pt QDs
  • Reaction mechanism
  • Synergetic effect
  • TiO nanotube arrays
  • Visible-light photocatalyst

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Renewable Energy, Sustainability and the Environment
  • Surfaces, Coatings and Films

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