超薄类石墨相氮化碳纳米片剥离技术的研究进展

超薄二维（2D）纳米材料，因其优异的电子、光学、物理和化学性能，以及各种潜在应用，在纳米技术、材料科学、化学和凝聚态物理等领域迅速发展. 类石墨相氮化碳（g-C₃N₄）是一类主要由碳和氮原子组成的2D聚合物材料，但块状g-C₃N₄比表面积小、分散性差严重影响其在光催化领域的应用. 因此，人们常采用剥离方法制备超薄g-C3N4纳米片. 本文主要详述了目前常用的热氧化剥离、超声辅助液相剥离和酸碱化学剥离等方法的现状及机理，并讨论了超薄g-C₃N₄纳米片未来的重点研究方向.

Research Progress in Exfoliation Technology of Ultrathin Graphite Carbon Nitride Nanosheets

Research on ultrathin two-dimensional （2D） nanomaterials has made great progress in the fields of nanotechnolog，material science，chemistry and condensed matter physics due to their compelling electronic，optical，physical and chemical properties，as well as their various potential applications. Graphite carbon nitride （g-C₃N₄） is a type of 2D polymeric materials mainly composed of carbon and nitrogen atoms. But bulk g-C₃N₄ possesses small specific?surface?area?and the poor dispersity，which seriously affects its application in the field of photocatalysis. Therefore，the researchers fabricate the ultrathing-C₃N₄ nanosheets by the exfolication method. The existing state and affairs and mechanism of thermal oxidation exfoliation method，ultrasonic auxiliary liquid exfoliation method，chemical exfoliation method with acid and alkali are reviewed. The future perspective for developing the ultrathing-C₃N₄nanosheets is discussed.