可见光驱动Au/SrTiO3纳米等离子体光催化剂分解水制氢

采用水热法和光沉积法制备了Au/SrTiO_3纳米等离子体光催化剂。通过XRD、XPS、SEM、TEM、EDS和DRS等技术对光催化剂的结构、组成、形貌、粒子大小和光吸收性质等进行了表征,考察了Au/SrTiO_3纳米光催化剂在可见光照下的制氢性能。结果表明,采用水热法成功合成了SrTiO_3纳米粒子,通过负载Au纳米粒子后,由于表面等离子体共振效应,增强了其对可见光的吸收。此外,测试了不同Au负载量对SrTiO_3光催化剂在可见光照下制氢活性的影响,其中,5%Au/SrTiO_3光催化剂在可见光照下制氢活性最高,并对其光催化反应机理进行了进一步的探讨。

Visible- Light Driven Au/SrTiO3 Plasmonic Nanophotocatalysts for Hydrogen Production from Water Splitting

Au/SrTiO3 plasmonic nanophotocatalysts were prepared by hydrothermal and photo-deposition methods. The structure, composition, morphology, size and optical property of the as-prepared photocatalysts were characterized by using X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS), scanning electron microscope (SEM), transmission electron microscope (TEM), EDS-mapping and UV-Visible diffuse reflectance spectroscopy (UV-Vis DRS). The photocatalytic hydrogen-production performance of Au/SrTiO3 plasmonic photocatalysts was test under visible light. The results show that SrTiO3 nanoparticles were successfully prepared by hydrothermal method. Due to the surface plasmon resonance (SPR) effect of Au, the SrTiO3 nanoparticles exhibited improved light absorption in the visible-light region. Moreover, the effect of different Au loading amounts on the photocatalytic hydrogen-production activity of SrTiO3 plasmonic nanophotocatalysts was investigated. Among them, the 5%Au/SrTiO3 photocatalyst showed the highest hydrogen production activity. In addition, the photocatalytic mechanism was also discussed.