The interactions between the functional groups of CP and TOCNF, respectively, were characterized using FT-IR (Fig. ). The FT-IR spectrum of CP shows characteristic peaks at 3300 cm -1 , 2900 cm -1 , 1638 cm -1 , 1306 cm -1 , and 890 cm -1 corresponding to stretching vibration of O-H, C-H, bending H-O-H, C-O, and C-O-C vibration for β, 1,4-glycosidic linkage, respectively (Fig. ). A new peak, assigned to Zn-O, at 422-425 cm -1 was observed after adding TEA to cellulose/Zn 2+ (Fig. ). The crystal growth of ZIF-8 materials in the presence of CP or TOCNF can be confirmed from the Zn-N bond at 420 cm -1 (Fig. ). The signal at 420 cm -1 is preserved after the processing into CelloZIFPaper, indicating the presence of ZIF-8 crystals in the final product. The successful synthesis of ZIF-8 can be confirmed from the XRD pattern of the paper that shows the characteristic diffraction pattern for ZIF-8 crystals (Fig. ). The diffraction patterns of the paper proceeding using the ex-situ synthesis procedure show firm diffraction peaks for ZIF-8 compared to the paper prepared via the in-situ procedure (Fig. ). The chemical bonds between cellulose (e.g., CP and TOCNF) and ZIF-8 inside CelloZIFPaper_