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Cu-Modified La2Si2O7/TiO2 composite materials: preparation, characterization and photothermal properties
Wei Li1, Chao-Chao Tao1, Jian-Ping Tang1
1Key Lab of Fluorine and Silicon for Energy Materials and Chemistry of Ministry of Education, College of Chemistry and Chemical Engineering, Jiangxi Normal University, Nanchang, 330022, China. slzhong@jxnu.edu.cn.
Abstract:
Cu-Modified La2Si2O7/TiO2 composite materials were prepared by the molten salt method and a solid-phase reduction strategy. Due to the surface plasmon resonance (SPR) of copper, the optical response from the UV to the visible region and near-infrared is increased. In the meantime, it enhances the absorption of visible light by the titanium dioxide and acts as a plasma catalyst. The combination enhances the photothermal properties of the composite. The particle size of Cu/La2Si2O7/TiO2 is in the range of 100 to 230 nm. Results show that the composite has a good photothermal effect. The 1 mg ml-1 solution can be warmed up to 63.1 °C at 0.5 W cm-2 laser power density with a maximum temperature difference of 45 °C. It has potential applications in solar energy conversion, photothermal catalysis, etc.
