| 基于巯基功能化介孔硅的Pb^2＋选择性吸附剂 |
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| 引用本文： | 肖文香.基于巯基功能化介孔硅的Pb^2＋选择性吸附剂[J].桂林电子科技大学学报,2009,29(3):264-267. |
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| 作者姓名： | 肖文香 |
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| 作者单位： | 桂林电子科技大学电子工程学院,广西桂林,541004 |
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| 基金项目： | 桂林电子科技大学科学研究基金 |
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| 摘 要： | 介孔二氧化硅由于具有较大的比表面积,因而是一种良好的吸附剂.为了实现介孔硅对水溶液中金属离子的选择性吸附,采用后接枝法将巯丙基三甲氧基硅烷引入二氧化硅网络中,合成了巯丙基功能化的MCM-41介孔硅.小角度XRD谱图表明,经过功能化后介孔硅基本保持了其原有的结构;FTIR结果显示,巯基被共价键合到了介孔硅基体上.实验结果表明,所制备的功能化材料可以选择性吸附水溶液中的Pb2+.考察了吸附时间、pH值、Pb2+初始浓度等因素对Pb2+吸附的影响,在吸附平衡时间为4 h、pH=6.0的最佳实验条件下,巯基功能化介孔硅吸附剂对Pb2+的最大吸附量为130 mg/g.吸附剂对Pb2+的选择性吸附遵从Freundlich模型.
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| 关 键 词： | 介孔硅 巯基功能化 选择性吸附 |
Pb~(2+) Selective Adsorbent Based on Thiol-functionalized Mesoporous Silica |
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| XIAO Wen-xiang.Pb~(2+) Selective Adsorbent Based on Thiol-functionalized Mesoporous Silica[J].Journal of Guilin Institute of Electronic Technology,2009,29(3):264-267. |
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| Authors: | XIAO Wen-xiang |
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| Affiliation: | School of Electronic Engineering;Guilin University of Electronic Technology;Guilin 541004;China |
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| Abstract: | Mesoporous silica is a kind of excellent adsorbents due to its high specific area.In order to selectively adsorb metal ions from aqueous solution,3mercaptopropyltrimethoxysilane was introduced into the network of mesoporous silica through post-grafting and thiol-functionalized MCM-41 mesoporous silica was obtained.Small angel XRD spectra indicated that mesoporous silica remained its original structure after functionalization.FTIR characterization revealed that thiol had been covalently bonded onto the surfa... |
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| Keywords: | Pb2 |
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