Electrochemical impedance spectroscopy, another arrow in the arsenal to study the biodegradability of two-dimensional materials.

Carbon nitride (C 3 N 4 ) is an innovative material with a high potential in many applications including energy storage, catalysis, composites, and biomedicine. C 3 N 4 appears remarkably interesting not only for its properties but also because its simple preparation routes involve low-cost starting materials and reagents. However, there is still a lack of information on its degradability. For this reason, in this study, we evaluate the environmental persistence of C 3 N 4 and its oxidized form by applying the photo-Fenton reaction. The morphological and structural changes of both materials were monitored by transmission electron microscopy and Raman spectroscopy respectively. In addition, electrochemical impedance spectroscopy has been used as an original technique to validate the degradation process of C 3 N 4 .