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首页> 外文期刊>Chemistry: A European journal >In Situ Synthesis of Porous Carbons by Using Room-Temperature, Atmospheric-Pressure Dielectric Barrier Discharge Plasma as High-Performance Adsorbents for Solid-Phase Microextraction
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In Situ Synthesis of Porous Carbons by Using Room-Temperature, Atmospheric-Pressure Dielectric Barrier Discharge Plasma as High-Performance Adsorbents for Solid-Phase Microextraction

机译：室温，大气压介电阻挡放电等离子体作为固相微萃取的高性能吸附剂原位合成多孔碳

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摘要

A one-step, template-free method is described to synthesize porous carbons (PCs) in situ on a metal surface by using a room-temperature, atmospheric-pressure dielectric barrier discharge (DBD) plasma. This method not only features high efficiency, environmentally friendliness, and low cost and simple equipment, but also can conveniently realize large-area synthesis of PCs by only changing the design of the DBD reactor. The synthesized PCs have a regulated nestlike morphology, and thus, provide a high specific surface area and high pore volume, which result in excellent adsorption properties. Its applicability was demonstrated by using a PC-coated stainless-steel fiber as a solid-phase microextraction (SPME) fiber to preconcentrate polycyclic aromatic hydrocarbons (PAHs) prior to analysis by gas chromatography with flame ionization detection (GC-FID). The results showed that the fiber exhibited excellent enrichment factors (4.1x10(4) to 3.1x10(5)) toward all tested PAHs. Thus, the PC-based SPME-GC-FID provides low limits of detection (2 to 20ngL(-1)), good precision (<7.8%), and good recoveries (80-115%) for ultra-sensitive determination of PAHs in real water samples. In addition, the PC-coated fiber could be stable enough for more than 500 replicate extraction cycles.
机译：描述了一种无模板的单步方法，该方法通过使用室温，大气压的电介质阻挡放电（DBD）等离子体在金属表面上原位合成多孔碳（PC）。该方法不仅效率高，环境友好，成本低廉，设备简单，而且只需改变DBD反应器的设计即可方便地实现PC的大面积合成。合成的PC具有规整的巢状形态，因此可提供高的比表面积和高的孔容，从而具有出色的吸附性能。通过使用PC涂层不锈钢纤维作为固相微萃取（SPME）纤维预浓缩多环芳烃（PAHs），然后通过气相色谱和火焰离子化检测（GC-FID）进行分析，证明了其适用性。结果表明，该纤维对所有测试的PAH表现出极好的富集因子（4.1x10（4）至3.1x10（5））。因此，基于PC的SPME-GC-FID对PAHs的超灵敏测定提供了低检测限（2至20ngL（-1）），良好的精密度（<7.8％）和良好的回收率（80-115％）。在真实的水样中。另外，涂覆有PC的光纤对于超过500个重复的提取循环可能足够稳定。

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