Fig. 2
(a) Synthesis strategy of the pristine g-C3N4 and the Brønsted acid functionalized g-C3N4-CO-(CH2)3-CO2H and g-C3N4-(CH2)3- SO3H, (b) powder XRD patterns, and (c) FT-IR spectra of the pristine g-C3N4 and functionalized g-C3N4-CO-(CH2)3-CO2H & g-C3N4-(CH2)3- SO3H.
