All of the chemicals were purchased and used without further purification.
FT-IR spectra were recorded (KBr pellets, 500–4000 cm−1) on a Nicolet Avatar 360 spectrophotometer. Raman spectra were tested by a Senterra Raman Scope system. All of the powder X-ray diffraction (PXRD) patterns of the materials were obtained from a Rigaku RINT 2500V (Japan) diffractometer at 298K. The XPS analysis was carried out by a PHI 5000 Versa Probe with Al K radiation (AXISNOVA,Kratos Inc.). Gas adsorption and desorption isotherms of N2 and CO2 were recorded by a surface area and porosity analyzer (BEL,Japan).