Preparation and Photocatalytic Activity for Hydrogen Evolution of Bimetallic Nano Ag/Cu on TiO2 Composite Photocatalysts
TU Shenghui1,2, XU Chong1,2, DAI Ce1, LIN Li1, PENG Hailong1, DU Jun1,2
1 School of Resources Environment and Chemical Engineering, Nanchang University, Nanchang 330031 2 Key Laboratory of Poyang Lake Environment and Resource Utilization, Ministry of Education, Nanchang University, Nanchang 330047
Abstract: Bimetallic nano Ag/Cu@P25 composite catalysts were prepared by chemical reduction method using TiO2 (P25) with anatase phase and rutile phase as main catalyst. Glycerol was used as a sacrificial reagent to investigate the effects of different Ag/Cu loading on hydrogen production. The experimental results show that, compared with the single metal load and pure TiO2(P25), the catalytic hydrogen production activity of the photocatalyst has been greatly increased after the bimetallic nano Ag/Cu loading, and the hydrogen production effect is 6 368.20 μmol·g-1·h-1 under visible light, and the hydrogen production activity under total light spectrum is 25 811.51 μmol·g-1·h-1, which is 11.55 times of pure TiO2 (P25) (2 234.27 μmol·g-1·h-1). It has good photocatalytic stability under the visible light. The micromorphology, structure and optical properties of the composite catalyst were investigated by X-ray diffractometer (XRD), specific surface area measuring instrument (BET) and field emission scanning electron microscope (SEM), Fourier transform infrared spectrometer (FT-IR), ultraviolet-visible diffuse reflectance spectroscopy (DRS), and the possible reaction mechanism of the bimetallic nano Ag/Cu@P25 composite catalyst was explored.
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2019, Vol. 33 
