Fig. 1From: Hierarchical Structure Kaolinite Nanospheres with Remarkably Enhanced Adsorption Properties for Methylene Bluea XRD patterns, b FTIR spectra, c Al2p XPS spectra, and d Si2p XPS spectra of the samples Kaol, calcined Kaolinite (C-Kaol), and the hydrothermal treatment calcined Kaolinite (PS-Kaol)Back to article page