Chinese Journal of Applied Chemistry ›› 2019, Vol. 36 ›› Issue (9): 1076-1084.DOI: 10.11944/j.issn.1000-0518.2019.09.190017

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One-Step Synthesis of TiO2-Au Composite and Its Performance for Photocatalytic Hydrogen Evolution

LIU Binga*(),GONG Huilia,LIU Ruia,HU Changwenb   

  1. aCollege of Resources Environment and Tourism,Capital Normal University,Beijing 100048,China
    bSchool of Chemistry and Chemical Engineering,Beijing Institute of Technology,Beijing 100081,China
  • Received:2019-01-22 Accepted:2019-04-08 Published:2019-09-05 Online:2019-09-05
  • Contact: Bing LIU


Titanium powders as the reductant and HAuCl4 were used as the oxidant to prepare TiO2-Au composite in the hydrothermal reactor at 180 ℃. Finally, the surface of TiO2 with 800 nm diameter was evenly coated by gold nanoparticles with 20 nm diameter. The specific surface area is about 3.5 m2/g. The structures and properties of the samples were characterized by X-ray diffraction(XRD), field emission scanning electron microscopy(FE-SEM), X-ray photoelectron spectroscopy(XPS), ultraviolet-visible diffuse reflectance spectroscopy, photocurrent density and photocatalytic hydrogen production performance. The morphology of the catalyst synthesized by the one-step method is regular. The final TiO2 is anatase. The catalyst has a strong absorption in the visible region, benefitting from the local surface plasmon resonance(LSPR) of gold nanoparticles. The hydrogen production performance of the catalyst increases firstly and then decreases with the increase of Au. Under visible light, the maximum hydrogen production rate is 0.1 μmol/(g·h) and the photocatalyst has good stability.

Key words: photocatalysis, TiO2-Au nanoparticles, visible light, water splitting