Facile synthesis of Ag/AgCl/BiPO4 plasmonic photocatalyst with significantly enhanced visible photocatalytic activity and high stability
Facile synthesis of Ag/AgCl/BiPO4 plasmonic photocatalyst with significantly enhanced visible photocatalytic activity and high stability
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DOI：
10.1039/c5ra12479d
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发表时间：
2015-10
期刊：
影响因子：
3.9
通讯作者：
Pandi Shan;C. Niu;Dawei Huang;G. Zeng;Huan Zhang
中科院分区：
文献类型：
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作者：
Pandi Shan;C. Niu;Dawei Huang;G. Zeng;Huan Zhang
采用水热法结合超声辅助沉淀-光还原技术成功制备了Ag/AgCl/BiPO 4复合光催化剂。采用X射线衍射（XRD）、扫描电子显微镜（SEM）、透射电子显微镜（TEM）、高分辨透射电子显微镜（HRTEM）、紫外-可见漫反射光谱（UV-vis DRS）、N2吸收-脱附等温线和光致发光（PL）光谱等手段对样品的物相结构、结晶度、形貌和光学性能进行了表征。实验结果表明，Ag/AgCl物种能有效提高光生电子空穴对的分离效率，进而提高光降解效率。Ag/AgCl/BiPO 4（15.4%）复合材料在可见光照射下对染料的降解具有最高的光催化活性。此外，通过捕集实验，提出了Ag/AgCl/BiPO 4光催化剂的可能的光催化机理，该机理可归因于Ag纳米粒子的表面等离子体共振（SPR）效应。
A novel composite Ag/AgCl/BiPO4 photocatalyst was successfully fabricated via a hydrothermal method combined with an ultrasonic-assisted precipitation–photoreduction technique. The phase structures, crystallinity, morphologies and optical properties of the as-prepared samples were characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM), transmission electron microscopy (TEM), high-resolution transmission electron microscopy (HRTEM), UV-vis diffuse reflectance spectroscopy (UV-vis DRS), N2 absorption–desorption isotherms and photoluminescence (PL) spectroscopy. The experimental results showed that the Ag/AgCl species could efficiently improve the separation efficiency of photo-generated electron–hole pairs, and then improve the photodegradation efficiency. The Ag/AgCl/BiPO4 (15.4%) composite shows the highest photocatalytic activity for the degradation of dyes under visible light irradiation. In addition, a possible photocatalytic mechanism for Ag/AgCl/BiPO4 was proposed by a trapping experiment, which can be ascribed to the surface plasmon resonance (SPR) effect of Ag nanoparticles.