| 铁掺杂的高比表面二氧化硅的制备及其苯酚降解性能 |
| High Specific Surface Area Porous Iron-Doped Silica: Preparation and Catalytic Performance for Phenol Decomposition |
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| 摘要: 研究了以聚乙二醇为模板剂、正硅酸乙酯(TEOS)为硅源制备铁掺杂的多孔二氧化硅的方法。开发了一步完成多孔材料制备和掺杂的新工艺。研究了不同的铁元素掺杂量对样品性能的影响。采用低温氮吸附、SEM、FTIR、XRD方法表征了样品的比表面、孔结构和表面基团等信息。最优样品比表面大于700 m2·g-1、孔容大于1 mL·g-1。研究了所制备的多孔材料和双氧水共同降解水中苯酚的能力，研究发现负载铁的催化剂可以在很宽的pH值范围内(3~8)和双氧水协同使用，这可能是因为铁元素被牢固负载于多孔二氧化硅的骨架上，避免了其在高pH值下发生的水解反应。 |
| 关键词: 二氧化硅 多孔 Fenton试剂 苯酚 催化降解 |
| 基金项目: |
| Abstract: Iron-doped porous silica was prepared using poly ethylene glycol (PEG) as the template and tetraethyl-orthosilicate (TEOS) as silicon precursor. In the novel routine, iron doping and porous material fabrication could be finished in one step. The influence of doping amount of iron on the samples was studied. The low temperature nitrogen adsorption-desorption, SEM, FTIR and XRD methods were employed to analyze the surface area, pore structure and surface groups of the as-made samples. The BET surface area and pore volume of the best sample is higher than 700 m2·g-1 and 1 mL·g-1, respectively. The catalytic performance of the samples upon phenol-decomposition by H2O2 in solution was investigated. The results show that the as-made sample could catalyze the phenol-decomposition reaction by H2O2 in wide pH range (3~8). The reason might lay in the fact that iron species is stabilized in the framework of porous silica, thus preventing them from hydrolyzing under high pH values. |
| Keywords: silica porous fenton agent phenol catalyzed decomposition |
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| 摘要点击次数: 1994 |
| 全文下载次数: 2349 |
| 刘海弟,陈运法.铁掺杂的高比表面二氧化硅的制备及其苯酚降解性能[J].无机化学学报,2010,26(12):2195-2202. |
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