| Fe_3O_4@SiO_2/TiO_2核壳结构纳米颗粒降解TNT溶液 |
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| 引用本文： | 高立波,张强,李俊漾,薛晨阳,闫军,徐宏妍.Fe_3O_4@SiO_2/TiO_2核壳结构纳米颗粒降解TNT溶液[J].环境工程学报,2014,8(6):2413-2416. |
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| 作者姓名： | 高立波 张强 李俊漾 薛晨阳 闫军 徐宏妍 |
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| 作者单位： | 中北大学电子测试国家重点实验室, 太原 030051;中北大学电子测试国家重点实验室, 太原 030051;中北大学电子测试国家重点实验室, 太原 030051;中北大学电子测试国家重点实验室, 太原 030051;军械工程学院, 石家庄 050000;中北大学电子测试国家重点实验室, 太原 030051 |
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| 基金项目： | 山西省归国留学人员基金（2008062）；山西省青年基金（2011021020-2） |
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| 摘 要： | 针对TNT炸药废水具有成分复杂、排放量大、有毒等特点,立足于炸药废水在排放前的降解处理,研究开发一种基于核壳结构Fe3O4@SiO2/TiO2纳米颗粒的高效、可控回收、无二次污染且成本低的光催化降解方法。利用高温碳还原法和溶胶凝胶法制备了具有核壳结构的Fe3O4@SiO2/TiO2纳米颗粒。XRD分析表明,内核Fe3O4呈现磁铁矿特征,表面覆盖的纳米TiO2为锐钛矿型。磁滞回线测试结果显示,复合颗粒的饱和磁化强度为46.5 emu/g,N2吸附-解吸分析结果表明,该颗粒具有典型的介孔结构。使用Fe3O4@SiO2/TiO2纳米颗粒在紫外光下对含TNT废水进行降解,降解率达到81.9%,且颗粒的回收率达到88.4%,为实现高效、可控回收、无二次污染光催化-吸附降解TNT奠定了基础。
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| 关 键 词： | 核壳结构 吸附 光催化 TNT |
Degradation of TNT waste solution by Fe3O4@SiO2/TiO2 magnetic core-shell nanoparticles |
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| Gao Libo,Zhang Qiang,Li Junyang,Xue Chenyang,Yan Jun and Xu Hongyan.Degradation of TNT waste solution by Fe3O4@SiO2/TiO2 magnetic core-shell nanoparticles[J].Techniques and Equipment for Environmental Pollution Control,2014,8(6):2413-2416. |
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| Authors: | Gao Libo Zhang Qiang Li Junyang Xue Chenyang Yan Jun and Xu Hongyan |
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| Institution: | National Key Laboratory for Electronic Measurement Technology, North University of China, Taiyuan 030051, China;National Key Laboratory for Electronic Measurement Technology, North University of China, Taiyuan 030051, China;National Key Laboratory for Electronic Measurement Technology, North University of China, Taiyuan 030051, China;National Key Laboratory for Electronic Measurement Technology, North University of China, Taiyuan 030051, China;Ordnance Engineering College, Shijiazhuang 050000, China;National Key Laboratory for Electronic Measurement Technology, North University of China, Taiyuan 030051, China |
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| Abstract: | Aimed at the complicated composition, high emission and poison of the TNT wastewater,a degradation method based on efficient and recoverable Fe3O4@SiO2/TiO2 nanoparticles through UV photocatalysis was reported. The Fe3O4@SiO2/TiO2 nanoparticles were obtained through high temperature carbon reduction method and gel-sol method. The results of XRD, TEM and magnetic characterizations showed that the magnetic cores were magnetite and the functional layer was anatase with the saturation magnetization of the overall nanoparticles was 46.5 emu/g. The morporous structure was demonstrated by the N2 adsorption-desorption analysis results. Fe3O4@SiO2/TiO2 nanoparticles were utilized on degradating 20 mg/L TNT waste solution under ultraviolet light. The degradation rate was 81.9% after 3 hours, and the recovery rate of Fe3O4@SiO2/TiO2 nanoparticles was 88.4%. The preparation of Fe3O4@SiO2/TiO2 nanoparticles laid a solid foundation of degradating TNT in photocatalytic method with high efficiency and controllable recovery but no secondary pollution. |
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| Keywords: | core-shell structure absorption photocatalysis TNT |
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