Journal
TRAC-TRENDS IN ANALYTICAL CHEMISTRY
Volume 84, Issue -, Pages 12-21Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.trac.2016.03.002
Keywords
Sorbent; Graphitic carbon nitride (g-C3N4); Tri-s-triazine units; Metal ions; Aromatic compounds; Analytical chemistry; Sorption mechanism; Modification
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Funding
- National Natural Science Foundation of China [21375136, 21105106]
- scientific research project of Central Asia Drug Discovery and Development Centre of Chinese Academy of Sciences [CAM 201404]
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As a green and efficient sorbent, graphitic carbon nitride (g-C3N4) with aromatic tri-s-triazine units has shown great potential for the enrichment or removal of metal ions and organic aromatic compounds, which makes it a promising candidate to complement graphenes in analytical chemistry. The in-built N-rich functional groups and electronic delocalization properties endow g-C(3)N(4)with complex sorption mechanism, containing complexion, hydrogen bond, redox reaction, 7t it conjugation, hydrophobic effect, acid -base reaction and electrostatic interaction. The structure and surface physicochemical properties related to the sorption behavior are mainly depended on the preparation and sorption conditions, such as polymerization temperature, polymerization precursors, the solution pH and ionic strength. As a new sorbent, g-C3N4 has been applied to the sample pretreatment in analytical chemistry with solid -phase extraction (SPE), magnetic solid -phase extraction (MSPE), and solid -phase microextraction (SPME) modes, recently. At the same time, a series of modification methods and technologies have been exploited to modify the structural and surface physicochemical properties of g-C3N4, facilitating more effective and selective sorption process. To raise awareness of the superior properties of g-C3N4 and facilitate its applications as a sorbent in analytical chemistry, the sorption properties (sorption mechanism, influence factors of sorption behavior), applications to the sample pretreatment and structural modifications of g-C3N4 are reviewed. (C) 2016 Elsevier B.V. All rights reserved.
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