Fig. 4. FT-IR (a), XRD (b), N₂ adsorption–desorption isotherms (c), and their corresponding pore size distributions (d) of KCC-1 synthesized by a facile one-pot rotating hydrothermal approach with different stirring rates of 0, 30, 60, 90, 120, and 150 rpm, respectively. Note: each curve of a higher stirring rate shifts 200 cm³ STP g⁻¹ and 0.4 cm³ g⁻¹ nm⁻¹ upward in Fig. 3c and d, respectively.