| 表面氨基高密度化介孔氧化硅的合成及其高效去除酸性橙7 |
| Synthesis and Efficient Removal of Acid Orange 7 of Mesoporous Silicas with High Surface Amino-Loading |
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| 摘要: 以月桂酸为阴离子表面活性剂,3-胺丙基三乙氧基硅烷(APTES)为共结构导向剂,合成了高含量氨基功能化介孔氧化硅材料(AFMS)。以AFMS为吸附剂对溶液中酸性橙7(AO7)进行吸附,对影响AO7吸附效率的相关因素进行了详细研究,结果表明,溶液pH值及温度影响较大。吸附动力学表明,本研究中合成的AFMS对AO7的吸附速率极快。Sips吸附模型对吸附等温线模拟效果最好,从中可知AO7在样品D(由3.0 mL正硅酸乙酯及1.4 mL APTES合成)上的最大吸附量为1.26 mmol·g-1,远远高于相关文献报道的值。此外,通过吸-脱附循环实验证明,样品D具有良好的稳定性。 |
| 关键词: 氨基功能化 介孔氧化硅 合成 酸性橙7 吸附 |
| 基金项目: 浙江省自然科学基金(No.LY14B07006,Y4110289)资助项目。 |
| Abstract: Mesoporous silicas with high amino-loading (AFMS) were synthesized using lauric acid and 3-aminopropyltriethoxysilane (APTES) as anionic surfactant and co-structure directing agent, respectively. The synthesized materials were used as adsorbents for removing acid orange 7 (AO7) from aqueous solution. The effects of pH value and temperature of solution containing AO7 on the removal of AO7 were investigated in detail and the results illustrated that the adsorption of AO7 was influenced by the pH and temperature of solution greatly. The kinetic results showed that the adsorption of AO7 on the AFMS was very fast. The Sips model was the best one to fit the adsorption isotherm, and the maximum adsorption capacity of AO7 on sample D synthesized by 3.0 mL tetraethoxysilane and 1.4 mL APTES is 1.26 mmol·g-1 from the Sips model, much higher than those reported in other literatures. Furthermore, as an adsorbent, sample D shows a good stability, confirmed by adsorption-regeneration cycles. |
| Keywords: amino-functionalization mesoporous silica synthesis acid orange 7 adsorption |
| 投稿时间：2015-08-02 修订日期：2015-11-05 |
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| 郝仕油,邓黄秀,章国栋.表面氨基高密度化介孔氧化硅的合成及其高效去除酸性橙7[J].无机化学学报,2016,32(2):233-240. |
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