A Facile Synthesis of Graphene-WO3 Nanowire Clusters with High Photocatalytic Activity for O-2 Evolution

作者：Zhou, M J; Zhang, N; Hou, Z H^*

来源：International Journal of Photoenergy, 2014, 2014: 943537.

DOI：10.1155/2014/943537

In the present work, graphene-WO3 nanowire clusters were synthesized via a facile hydrothermal method. The obtained graphene-WO3 nanowire clusters were characterized by X-ray diffraction (XRD), transmission electron microscopy (TEM), X-ray photoelectron spectroscopy (XPS), Fourier transform infrared spectroscopy (FT-IR), Raman spectroscopy, and ultraviolet-visible diffuse reflectance spectroscopy (DRS) techniques. The photocatalytic oxygen (O-2) evolution properties of the as-synthesized samples were investigated by measuring the amount of evolved O-2 from water splitting. The graphene-WO3 nanowire clusters exhibited enhanced performance compared to pure WO3 nanowire clusters for O-2 evolution. The amount of evolved O-2 from water splitting after 8 h for the graphene-WO3 nanowire clusters is ca. 0.345 mmol/L, which is more than 1.9 times as much as that of the pure WO3 nanowire clusters (ca. 0.175 mmol/L). The high photocatalytic activity of the graphene-WO3 nanowire clusters was attributed to a high charge transfer rate in the presence of graphene.

• 出版日期2014
• 单位湖南理工学院