Highly Ordered Mesoporous Carbon Nitride Nanoparticles with High Nitrogen Content: A Metal-Free Basic Catalyst
Highly Ordered Mesoporous Carbon Nitride Nanoparticles with High Nitrogen Content: A Metal-Free Basic Catalyst
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DOI：
10.1002/anie.200903674
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发表时间：
2009-01-01
影响因子：
16.6
通讯作者：
Vinu, Ajayan
中科院分区：
文献类型：
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作者：
Jin, Xin;Balasubramanian, Veerappan V.;Vinu, Ajayan
介孔二氧化硅纳米颗粒（MSNs）具有可控的尺寸、形态和可调的孔隙度，在药物递送、催化、吸附、分离和燃料电池等领域的应用受到了广泛的关注。[1-3]具有不同官能团和结构的各种msn已被制备并用于药物和基因传递[4,5]，而由碳和氮组成的介孔纳米颗粒在碱性催化和二氧化碳捕获方面特别受关注。氮化碳（CN）是一种众所周知的、令人着迷的材料，由于在碳纳米结构中加入氮原子可以增强其机械、导电、场发射和储能性能而引起了全世界的关注。[6-14]介孔CN （MCN）材料具有大表面积、小粒径和可调孔径，由于其有趣的电学和导电性，有望获得更广泛的应用。最近，Vinu etal。报道了以介孔二氧化硅SBA-15为模板制备孔径可调的介孔氮化碳。[15-17]不幸的是，由于其热稳定性低，材料的氮含量低，并且表现出较大的颗粒尺寸。超细介孔纳米颗粒有望提供优良的结构参数和高的化学、热和机械稳定性，这可能有助于在CN框架的壁中实现高氮含量。控制介孔碳基质中氮的含量是非常重要的，因为MCN壁结构中的氮原子可以以的形式提供基本位点
Mesoporous silica nanoparticles (MSNs) with controlled size, morphology, and tunable porosity have been receiving much attention due to their applications in the fields of drug delivery, catalysis, adsorption, separation, and fuel cells.[1–3] Various MSNs with different functional groups and structures have been prepared and utilized for drug and gene delivery,[4, 5] while mesoporous nanoparticles composed of carbon and nitrogen are of particular interest for basic catalysis and the capture of carbon dioxide. Carbon nitride (CN) is a well known and fascinating material that has attracted worldwide attention because the incorporation of nitrogen atoms in the carbon nanostructure can enhance the mechanical, conducting, field-emission, and energy-storage properties.[6–14] Mesoporous CN (MCN) materials with large surface areas, small particle sizes, and tunable pore diameters promise access to an even wider range of applications due to their interesting electrical and conducting properties. Recently, Vinu etal. reported the preparation of mesoporous carbon nitride with tunable pore size using mesoporous silica SBA-15 as template.[15–17] Unfortunately, the materials had a low nitrogen content due to their low thermal stability and exhibited a large particle size.Ultrafine mesoporous nanoparticles are expected to provide excellent textural parameters and high chemical, thermal, and mechanical stability, which may help to achieve high nitrogen content in the walls of the CN framework. Controlling the nitrogen content in the mesoporous carbon matrix is extremely important, as the nitrogen atoms in the wall structure of MCN can offer basic sites in the form of