Fig. 3From: Hierarchical Structure Kaolinite Nanospheres with Remarkably Enhanced Adsorption Properties for Methylene BlueNitrogen adsorption-desorption isotherms (a) and DFT pore size distribution curves (b) of Kaol, calcined Kaolinite (C-Kaol), and the hydrothermal treatment calcined Kaolinite (PS-Kaol)Back to article page