Enhanced photocatalytic properties of α-SnWO4 nanosheets modified by Ag nanoparticles
Xuewei Liua, b, Bo Liangb, *（梁波）, Min Zhanga, Yumei Longa, Weifeng Lia, *（李伟峰）
aCollege of Chemistry, Chemical Engineering and Materials Science, Soochow University, Suzhou 215123, China
bState Key Laboratory of Metastable Materials Science and Technology, Yanshan University, Qinhuangdao 066004, China
Journal of Colloid and Interface Science,Volume 490, 15 March 2017, Pages 46–52
Decoration of silver nanoparticles (Ag-NPs) on surface of α-SnWO4 nanosheets has been achieved by a microwave-assisted deposition method. The as-synthesized products are structurally characterized by X-ray diffraction (XRD) and transmission electron microscopy (TEM). The results illustrate that Ag-NPs are evenly anchored onto α-SnWO4 surface to form close heterojunction and the amount of Ag nanoparticles grown on α-SnWO4 nanosheets can be well controlled by tuning Ag+ concentration. The photocatalytic properties of Ag-NPs/α-SnWO4 composites are evaluated by degrading methyl orange (MO) under visible-light irradiation. Ag-NPs/α-SnWO4 composites exhibit better photocatalytic properties than that of pure α-SnWO4, and Ag-NPs/α-SnWO4 (5 mol% Ag) presents the best photocatalytic activity, whose photodegradation efficiency of MO is about 97% within 70 min. In addition, the obtained samples demonstrate good recyclability. The enhanced photocatalytic properties was attributed to synergistic effect between Ag-NPs and α-SnWO4 nanosheets, which can increase absorption of visible light enabled by surface plasma resonance (SPR) of Ag-NPs and facilitate the separation of photogenerated electron-hole pairs.
链接：http://www.sciencedirect.com/science/article/pii/S0021979716309055