1. One-pot hydrothermal synthesis of SrTiO3-reduced graphene oxide composites with enhanced photocatalytic activity for hydrogen production.
- Author
-
He, Gang-Ling, Zhong, Yan-Hao, Chen, Ming-Jie, Li, Xin, Fang, Yue-Ping, and Xu, Yue-Hua
- Subjects
- *
HYDROTHERMAL synthesis , *STRONTIUM titanate , *GRAPHENE oxide , *CATALYTIC activity , *HYDROGEN production , *X-ray diffraction , *PHOTOCATALYSIS - Abstract
SrTiO 3 -reduced graphene oxide (SrTiO 3 -RGO) composites were synthesized via a facile one pot hydrothermal process. This was achieved by decorating graphene oxide (GO) layers with Ti(OBu) 4 and Sr(NO 3 ) 2 as starting materials followed by hydrothermal synthesis, which converts the SrTiO 3 particles with a diameter of 87–200 nm on the RGO surface, without using strong reducing agents. The as-prepared samples were characterized by X-ray diffraction (XRD), transmission electron microscope (TEM), diffuse reflectance spectra (DRS), photoluminescence spectra (PL), electrochemical impedance spectra (EIS), and photocurrent analysis. SrTiO 3 particles were shown to be grown homogeneously on the RGO sheets with close interfacial contacts. The photocatalytic hydrogen evolution activities of the SrTiO 3 and SrTiO 3 -RGO composites were contrasted. Compared to SrTiO 3 , SrTiO 3 -RGO composites showed much higher photocatalytic hydrogen production activity under UV light irradiation. The SrTiO 3 -0.8%RGO composite showed the highest photocatalytic H 2 evolution activity. PL, EIS and photocurrent analysis were used to elucidate the mechanism that the enhancement of photocatalytic hydrogen evolution activity over the SrTiO 3 -RGO composites is attributed to the reduction of the photogenerated electron-hole recombination. [ABSTRACT FROM AUTHOR]
- Published
- 2016
- Full Text
- View/download PDF