Solubility of graphene-like two-dimensional layered CN

As a new type of carbon nitride material with high nitrogen content, g-C 3 N 3 has promising application potential in the fields of photocatalysis, electrochemistry and energy storage. In this study, we found that g-C 3 N 3 can be dissolved in concentrated sulfuric acid at room temperature to form a true thermodynamic solution for the first time, and the g-C 3 N 3 can be reversibly precipitated successfully by adding deionized water to the solution. The solution with a high concentration of 300 mg ml −1 exhibits good stability even at −40 °C. The dissolution phenomenon of g-C 3 N 3 in concentrated sulfuric acid and the solution stability at low temperature will pave the way for its potential applications. g-C 3 N 3 can be dissolved in concentrated sulfuric acid at room temperature to form a true thermodynamic solution. By adding deionized water to the solution, it can be successfully reversible precipitated.