期刊
TALANTA
卷 195, 期 -, 页码 165-172出版社
ELSEVIER SCIENCE BV
DOI: 10.1016/j.talanta.2018.11.038
关键词
Graphene aerogel; Compressibility; Self-recoverability; Controllable amphiphilicity; Phenols
资金
- Talent Foundation of Jiangsu University of Science and Technology
- National Natural Science Foundation of China [21705060, 21605105]
- Natural Science Foundation of Jiangsu Province, China [BK20170570]
- Natural Science Research of Jiangsu Higher Education Institutions of China [17KJB150014]
- Six Talent Peaks Project in Jiangsu Province, China [SWYY-021]
- Zhenjiang Science AMP
- Technology Program [SH2016015]
- Foundation from Marine Equipment and Technology Institute of Jiangsu University of Science and Technology
Graphene aerogels (GAs) have demonstrated great promise as sorbent materials. However, the intrinsically hydrophobic GAs are unsuitable for extraction of highly water-soluble analytes. Moreover, lack of compressibility limits the recyclability of GAs. In this work, an interesting type of water-induced self-recoverable amphiphilic GA was synthesized and employed as sorbent to extract nine priority phenols, listed as priority pollutants by the United States Environmental Protection Agency, from aqueous samples. The water-induced self-recoverability gives the GA the characteristic of a sponge, providing high recyclability and long-life. The aerogel was placed in a 2-mL microsyringe for in-syringe extraction of the phenols. The GA exhibits amphiphilicity due to the cross-linking by polyvinyl alcohol. At the same time, it exhibited selectivity to the water-soluble phenols. The extracted phenols were eluted with acetonitrile from the GA and the final extract was analyzed by high-performance liquid chromatography with ultraviolet detection (HPLC-UV). The results showed that this method provided low limits of detection for the phenols (0.089-0.015 mu g/L), good linearity (r(2) >= 0.9956) and low relative standard deviations (<= 6.8%). The optimized method was applied successfully to river water samples. The simple in-syringe extraction procedure in combination with HPLC-UV analysis was demonstrated to be efficient, fast and convenient.
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