摘要
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).
出处
《无机化学学报》
SCIE
CAS
CSCD
北大核心
2015年第4期649-658,共10页
Chinese Journal of Inorganic Chemistry
基金
贵州省科技创新人才团队建设基金项目(黔科人字[2013]4029)
贵州省材料物理与化学特色重点学科建设基金项目(黔教高发[2011]208)
贵州省教育厅特色重点实验室建设基金项目(黔教高发[2012]196)
贵州省教育厅市州地普通本科高校教育质量提升科研项目(黔教高发[2011]278-01)资助
关键词
硫掺杂
二氧化锡
固相合成
可见光降解
百草枯
S-doped
Sn O2
solid state synthesis
photocatalytic degradation
paraquat