Ordered mesoporous carbon/Nafion as a versatile and selective solid-phase microextraction coating

• Published in: Journal of Chromatography A Vol. 1365; pp. 29 - 34
• Main Authors: Zeng, Jingbin, Zhao, Cuiying, Chen, Jingjing, Subhan, Fazle, Luo, Liwen, Yu, Jianfeng, Cui, Bingwen, Xing, Wei, Chen, Xi, Yan, Zifeng
• Format: Journal Article
• Language: English
• Published: Amsterdam Elsevier B.V 24.10.2014; Elsevier
• Subjects: Amines; Amines - analysis; Analytical chemistry; Applied sciences; benzene; Benzene Derivatives - analysis; Binders; Carbon; Carbon - chemistry; carbon nanotubes; Chemistry; Chromatographic methods and physical methods associated with chromatography; chromatography; Coating; coatings; Crude oil; Crude oil, natural gas and petroleum products; Electrochemical Techniques; electrochemistry; Energy; Exact sciences and technology; Extraction; Feasibility Studies; Fluorocarbon Polymers - chemistry; Fuels; Gas chromatographic methods; Nafion; Nanotubes, Carbon; non-polar compounds; Ordered mesoporous carbon; petroleum; Petroleum - analysis; phenols; Phenols - analysis; polar compounds; Porosity; porous media; Prospecting and production of crude oil, natural gas, oil shales and tar sands; silica; Solid Phase Microextraction - methods; Solid-phase microextraction; Stainless Steel; sucrose; Surface area; Solid-phase microextraction; Coating; Nafion; Ordered mesoporous carbon; Chemical analysis; Halophenols; Flame ionization detector; Wire; Porous material; Chemical enrichment; Surface structure; Sulfonate copolymer; Persistent organic pollutant; Characterization; Cresol; Ethylbenzene; Tetrafluoroethylene copolymer; Sample preparation; Composite coating; Xylene; Trace analysis; Ionomer; Scanning electron microscopy; Hydrocarbon; Toluene; Aniline derivatives; Light petroleum fraction; Carbon; Mesoporosity; Solid phase microextraction; Gas chromatography; Transmission electron microscopy; Stainless steel; Benzene; Morphology; Cation exchange membrane; Phenols; Aromatic amine
• ISSN: 0021-9673; 1873-3778
• DOI: 10.1016/j.chroma.2014.08.094

•Highly ordered mesoporous carbon (OMC) was synthesized.•The as-synthesized OMC was of high surface area and uniform mesoporous structure.•The OMC was prepared as an SPME coating using Nafion as a binder.•The OMC/Nafion coating exhibited excellent extraction selectivity towards aromatic compounds. In this study, ordered mesoporous carbon (OMC) with large surface area (1019m2g−1), uniform mesoporous structure (pore size distribution centering at 4.2nm) and large pore volume (1.46cm3g−1) was synthesized using 2D hexagonally mesoporous silica MSU-H as the hard template and sucrose as the carbon precursor. The as-synthesized OMC was immobilized onto a stainless steel wire using Nafion as a binder to prepare an OMC/Nafion solid-phase microextraction (SPME) coating. The extraction characteristics of the OMC/Nafion coating were extensively investigated using a wide range of analytes including non-polar (light petroleum and benzene homologues) and polar compounds (amines and phenols). The OMC/Nafion coating exhibited much better extraction efficiency towards all selected analytes than that of a multi-walled carbon nanotubes/Nafion coating with similar length and thickness, which is ascribed to its high surface area, well-ordered mesoporous structure and large pore volume. When the OMC/Nafion coating was used to extract a mixture containing various kinds of analytes, it possessed excellent extraction selectivity towards aromatic non-polar compounds. In addition, the feasibility of the OMC/Nafion coating for application in electrochemically enhanced SPME was demonstrated using protonated amines as model analytes.