In Situ Synthesis of Porous Carbons by Using Room-Temperature, Atmospheric-Pressure Dielectric Barrier Discharge Plasma as High-Performance Adsorbents for Solid-Phase Microextraction.
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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DOI：
10.1002/chem.201500814
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发表时间：
2015-09
期刊：
影响因子：
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通讯作者：
Yao Lin;Li Wu;Kailai Xu;Yunfei Tian;X. Hou;C. Zheng
中科院分区：
文献类型：
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作者：
Yao Lin;Li Wu;Kailai Xu;Yunfei Tian;X. Hou;C. Zheng
介绍了一种利用室温常压介质阻挡放电（DBD）等离子体在金属表面原位合成多孔碳（PCs）的一步法、无模板法。该方法不仅效率高、环境友好、成本低、设备简单，而且只需改变DBD反应器的设计，即可方便地实现大面积合成pc。合成的聚苯乙烯具有可调节的巢状形态，因此具有高比表面积和高孔体积，从而具有优异的吸附性能。通过使用pc包覆不锈钢纤维作为固相微萃取（SPME）纤维，在气相色谱火焰电离检测（GC-FID）分析之前预先浓缩多环芳烃（PAHs），证明了其适用性。结果表明，该纤维对所有测试的多环芳烃都具有良好的富集因子(4.1×10（4) ~ 3.1×10(5)）。因此，基于pc的SPME-GC-FID具有较低的检出限（2 ~ 20 ng L(-1)）、良好的精密度（<7.8%）和良好的回收率（80 ~ 115%），可用于实际水样中多环芳烃的超灵敏测定。此外，pc包覆的纤维足够稳定，可以重复提取500次以上。
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 (4.1×10(4) to 3.1×10(5)) toward all tested PAHs. Thus, the PC-based SPME-GC-FID provides low limits of detection (2 to 20 ng L(-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.