Photocatalytic activity of Ag–TiO2-graphene ternary nanocomposites and application in hydrogen evolution by water splitting

The results showed that Ag nanoparticles were well dispersed on the surface of PG with metallic state

Yuhao Yang; Enzhou Liu; Hongzhe Dai; Limin Kang; Huitong Wu; Jun Fan; Xiaoyun Hu; Hanchen Liu


Scholarcy highlights

  • TiO2-graphene nanocomposite was fabricated with P25 and graphite oxide through a hydrothermal method, and Ag nanoparticles was assembled in P25-GR under microwave-assisted chemical reduction
  • The prepared samples were characterized by X-ray diffraction, X-ray photoelectron spectroscopy, scanning electron microscope, transmission electron microscopy, photoluminescence spectrum, UV–vis absorption spectrum and Raman spectrum, respectively
  • The results showed that Ag NPs were well dispersed on the surface of PG with metallic state
  • The ternary Ag-P25-GR nanocomposites possessed the extended light absorption range and more efficient charge separation properties compared to binary P25-GR
  • The corresponding hydrogen evolution rate of APG prepared with 0.002 M AgNO3 solution was 7.6 times than pure P25 and 2.7 times than PG in the test condition
  • The improved photocatalytic performance can be attributed to the presence of GR and surface plasmon resonance effect, leading to the longer lifetime of photo-generated electron–hole pairs and faster interfacial charge transfer rate
  • We expected our work could give a new train of thought on exploration of GR-based nanocomposites

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