硫掺杂氧化锡纳米材料的固相合成及其可见光降解百草枯(英文)

Sulfur Doped Tin Oxide Nanoparticles: Solid State Synthesis and Performance for Visible-Light Driven Photocatalytic Degradation of Paraquat

以十二烷基苯磺酸钠（SDBS）为模板,采用低温固相反应法合成了硫掺杂二氧化锡（S-Sn O2）纳米粉体材料,并用XRD、XPS、SEM、UV-Vis、FTIR及HR-TEM等技术对材料进行了表征,探讨了S掺杂Sn O2纳米材料对百草枯的可见光降解性能,分析了S掺杂效应的作用机理。结果表明,采用固相反应法所得Sn O2及S-Sn O2纳米材料的禁带宽度变窄,SDBS对材料的表面结构具有一定的调控作用。S是以S（Ⅳ）和S（Ⅵ）的形式进入Sn O2晶格形成Sn1-xSxO2晶体结构而不是进入Sn O2晶格间隙,Sn-O-S键的弯曲振动峰介于930-980 cm-1之间。S的掺杂使Sn O2纳米材料表面活性增强,

Sulfur doped tin oxide（S-Sn O2） nanoparticles with high visible light-driven activity was synthesized by a facile solid state synthesis approach at low temperature using sodium dodecyl benzene sulfonate（SDBS） as a template. The samples were characterized by XRD, XPS, SEM, UV-Vis, HR-TEM, and FTIR. The doping mechanism and photocatalytic degradation of paraquat under visible light irradiation were investigated. The results show that the SDBS has a significant regulating effect on the surficial structure for both Sn O2 and S-Sn O2 prepared by solid state synthesis. The S element is successfully incorporated into the lattice of Sn O2 with S（Ⅳ） and S（Ⅵ） rather than embeds into the interstice of Sn O2 lattice. S-doping enhances the photocatalytic activity of Sn O2 due to the presence of a large number of hydroxyls on the surface and S （Ⅵ） in the lattice of Sn O2 benefiting the light absorption and effective charge separation, and it follows an order of Sn O2S-Sn O2Sn O2（SDBS）S-Sn O2（SDBS）.