Long Anying, Liu Hailin, Xu Shengrui, Feng Suling, Shuai Qin, Hu Shenghong
State Key Laboratory of Biogeology and Environmental Geology, School of Earth Sciences, China University of Geosciences, Wuhan 430074, China.
113 Geological Brigade, Bureau of Geology and Mineral Exploration and Development Guizhou Province, Liupanshui 553000, China.
Nanomaterials (Basel). 2022 Dec 8;12(24):4376. doi: 10.3390/nano12244376.
In this study, polyacrylic acid functionalized N-doped porous carbon derived from shaddock peels (PAA/N-SPCs) was fabricated and used as a solid-phase microextraction (SPME) coating for capturing and determining volatile halogenated hydrocarbons (VHCs) from water. Characterizations results demonstrated that the PAA/N-SPCs presented a highly meso/macro-porous hierarchical structure consisting of a carbon skeleton. The introduction of PAA promoted the formation of polar chemical groups on the carbon skeleton. Consequently, large specific surface area, highly hierarchical structures, and abundant chemical groups endowed the PAA/N-SPCs, which exhibited superior SPME capacities for VHCs in comparison to pristine N-SPCs and commercial SPME coatings. Under the optimum extraction conditions, the proposed analytical method presented wide linearity in the concentration range of 0.5-50 ng mL, excellent reproducibility with relative standard deviations of 5.8%-7.2%, and low limits of detection varying from 0.0005 to 0.0086 ng mL. Finally, the proposed method was applied to analyze VHCs from real water samples and observed satisfactory recoveries ranging from 75% to 116%. This study proposed a novel functionalized porous carbon skeleton as SPME coating for analyzing pollutants from environmental samples.
在本研究中，制备了由柚子皮衍生的聚丙烯酸功能化氮掺杂多孔碳（PAA/N-SPCs），并将其用作固相微萃取（SPME）涂层，用于捕集和测定水中的挥发性卤代烃（VHCs）。表征结果表明，PAA/N-SPCs呈现出由碳骨架组成的高度介孔/大孔分级结构。PAA的引入促进了碳骨架上极性化学基团的形成。因此，大比表面积、高度分级结构和丰富的化学基团赋予了PAA/N-SPCs，与原始N-SPCs和商业SPME涂层相比，其对VHCs表现出优异的SPME能力。在最佳萃取条件下，所提出的分析方法在0.5-50 ng mL的浓度范围内具有宽线性，相对标准偏差为5.8%-7.2%，具有出色的重现性，检测限低至0.0005至0.0086 ng mL。最后，将所提出的方法应用于分析实际水样中的VHCs，回收率在75%至116%之间，结果令人满意。本研究提出了一种新型功能化多孔碳骨架作为SPME涂层，用于分析环境样品中的污染物。
