Inhomogeneities of charge distribution in porous graphitic carbon nitride g-CxNy nanosheetsZefen Liang, Tianxiang He, Hongtao Xue, Fuling Tang and Ding FanEur. Phys. J. D, 74 12 (2020) 231DOI: https://doi.org/10.1140/epjd/e2020-10389-7