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首页> 外文期刊>RSC Advances >Mesoporous silica-carbon composites fabricated by a universal strategy of hydrothermal carbonization: controllable synthesis and applications
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Mesoporous silica-carbon composites fabricated by a universal strategy of hydrothermal carbonization: controllable synthesis and applications

机译：中孔二氧化硅 - 碳复合材料，采用水热碳化的普遍策略制造：可控合成和应用

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摘要

Mesoporous silica-carbon composite materials, with homogeneous and thickness-controllable carbon coating, were synthesized by using a universal strategy of hydrothermal carbonization, and the carbon layer could be coated on the surface of ordered and disordered mesoporous silica. The electrostatic interaction between amino-modified silica and hydrothermal carbon was regarded as the main driving force for the formation of homogeneous carbon coverage on the silica surface. The obtained composites showed high graphitization degree, and controlled morphology (shape and particle size) and pore size by adjusting the species of carriers and hydrothermal conditions. The application results demonstrated that a thin carbon layer possessed high adsorption capacities for dyes, and the composite could be rapidly recovered by sedimentation (10 min) after adsorption with 30 mu m spherical silica gel as the carrier. Besides, baseline chromatographic separation of oligosaccharide isomers could be achieved on the silica-carbon column. These results indicated that the silica-carbon composites should be promising functional materials for the large-molecule-involving processes such as adsorption and chromatographic separation.
机译：通过使用普遍的水热碳化策略合成了具有均相和厚度可控碳涂层的中孔二氧化硅 - 碳复合材料，并且可以在有序和无序的介孔二氧化硅表面上涂覆碳层。氨基改性二氧化硅和水热碳之间的静电相互作用被认为是在二氧化硅表面形成均匀碳覆盖的主要驱动力。通过调节载体和水热条件的种类，所获得的复合材料显示出高图石化程度和控制形态（形状和粒度）和孔径。施用结果表明，薄碳层具有高吸附能力的染料，并且在用30μm球形硅胶作为载体吸附后，可以通过沉降（10分钟）快速回收复合材料。此外，可以在二氧化硅 - 碳柱上实现寡糖异构体的基线色谱分离。这些结果表明，二氧化硅 - 碳复合材料应该是用于大分子涉及吸附和色谱分离的大分子涉及的官能材料。

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  • 来源
    《RSC Advances》 |2018年第48期|共9页
  • 作者

    Sun Xitong; Yu Wei; Yan Jingyu; Li Jiaqi; Jin Gaowa; Feng Jiatao; Guo Zhimou; Liang Xinmiao;

  • 作者单位

    Chinese Acad Sci Dalian Inst Chem Phys Key Lab Separat Sci Analyt Chem Dalian 116023 Liaoning Peoples R China;

    Chinese Acad Sci Dalian Inst Chem Phys Key Lab Separat Sci Analyt Chem Dalian 116023 Liaoning Peoples R China;

    Chinese Acad Sci Dalian Inst Chem Phys Key Lab Separat Sci Analyt Chem Dalian 116023 Liaoning Peoples R China;

    Chinese Acad Sci Dalian Inst Chem Phys Key Lab Separat Sci Analyt Chem Dalian 116023 Liaoning Peoples R China;

    Chinese Acad Sci Dalian Inst Chem Phys Key Lab Separat Sci Analyt Chem Dalian 116023 Liaoning Peoples R China;

    Chinese Acad Sci Dalian Inst Chem Phys Key Lab Separat Sci Analyt Chem Dalian 116023 Liaoning Peoples R China;

    Chinese Acad Sci Dalian Inst Chem Phys Key Lab Separat Sci Analyt Chem Dalian 116023 Liaoning Peoples R China;

    Chinese Acad Sci Dalian Inst Chem Phys Key Lab Separat Sci Analyt Chem Dalian 116023 Liaoning Peoples R China;

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  • 正文语种 eng
  • 中图分类 化学;
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