Advances and applications of graphitic carbon nitride as sorbent in analytical chemistry for sample pretreatment: A review
Advances and applications of graphitic carbon nitride as sorbent in analytical chemistry for sample pretreatment: A review
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DOI：
10.1016/j.trac.2016.03.002
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发表时间：
2016-11
期刊：
影响因子：
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通讯作者：
Yingpei Sun;Wei Ha;Juan Chen;Huan-yang Qi;Yan-ping Shi
中科院分区：
文献类型：
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作者：
Yingpei Sun;Wei Ha;Juan Chen;Huan-yang Qi;Yan-ping Shi
作为一种绿色高效的吸附剂，具有芳香型三-s-三嗪单元的石墨氮化碳（g-C3N4）在富集或去除金属离子和有机芳香族化合物方面表现出了巨大的潜力，是分析化学中与石墨烯互补的有希望的候选材料。内置的富n官能团和电子离域性质赋予g- c3n4具有复杂的吸附机理，包含色相、氢键、氧化还原反应、π - π共轭、疏水效应、酸碱反应和静电相互作用。与吸附行为相关的结构和表面物理化学性质主要取决于制备和吸附条件，如聚合温度、聚合前驱物、溶液pH和离子强度。g- c3n4作为一种新型吸附剂，近年来在固相萃取（SPE）、磁固相萃取（MSPE）和固相微萃取（SPME）等分析化学样品前处理中得到了广泛的应用。同时，开发了一系列改性方法和技术，对g-C3N4的结构和表面物理化学性质进行了改性，使吸附过程更加有效和选择性。为了提高对g- c3n4优异性能的认识，促进其作为吸附剂在分析化学中的应用，本文综述了g- c3n4的吸附性能（吸附机理、吸附行为的影响因素）、在样品前处理和结构修饰方面的应用。
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-C3N4with complex sorption mechanism, containing complexion, hydrogen bond, redox reaction, π – π 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-C3N4has 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-C3N4and 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-C3N4are reviewed.