| 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 | |
| Sulfur Doped Tin Oxide Nanoparticles: Solid State Synthesis and Performance for Visible-Light Driven Photocatalytic Degradation of Paraquat | |
| 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-SnO2)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SnO2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SnO2及S-SnO2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SnO2晶格形成Sn1-xSxO2晶体结构而不是进入SnO2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SnO2纳米材料表面活性增强,光催化降解百草枯的活性依次为SnO2 < SnO2(SDBS) < S-SnO2 < S-SnO2(SDBS),2 h内,S-SnO2(SDBS)样品对除草剂百草枯的光催化活性达95.2%,其主要原因是S-SnO2(SDBS)材料表面有更多的羟基和进入SnO2晶格的S,有利光生电荷的有效分离。 | |
| 关键词: 硫掺杂 二氧化锡 固相合成 可见光降解 百草枯 | |
| 基金项目: 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。 | |
| Abstract: Sulfur doped tin oxide (S-SnO2) 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 SnO2 and S-SnO2 prepared by solid state synthesis. The S element is successfully incorporated into the lattice of SnO2 with S(Ⅳ) and S(Ⅵ) rather than embeds into the interstice of SnO2 lattice. S-doping enhances the photocatalytic activity of SnO2 due to the presence of a large number of hydroxyls on the surface and S(Ⅵ) in the lattice of SnO2 benefiting the light absorption and effective charge separation, and it follows an order of SnO2 < S-SnO2 < SnO2(SDBS) < S-SnO2(SDBS). | |
| Keywords: S-doped SnO2 solid state synthesis photocatalytic degradation paraquat | |
| 投稿时间：2014-09-01 修订日期：2015-02-08 | |
| 摘要点击次数: 1343 | |
| 全文下载次数: 2462 | |
| 贺仲兵,刘少友,闵宗义,杨红芸,聂信.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[J].无机化学学报,2015,31(4):649-658. | |
| 查看全文 查看/发表评论 下载PDF阅读器 | |
| Support information: | |
|
| |
|
| |
|
| |