fig1
Figure 1. (A) The PXRD pattern of HNU-G4; (B) FT-IR spectrum of HNU-G4; (C) TG plot of HNU-G4; (D) SEM image of the dry gel HNU-G4. PXRD: Powder X-ray diffractometer; FT-IR: Fourier transform infrared spectrometer; TG: thermogravimetry; SEM: scanning electron microscopy.
