The high dispersion of CuCl2 in NaZSM-5 by using microwave technique

By using microwave technique, the high dispersion of CuCl₂ in NaZSM-5 zeolite (CuCl₂·2H₂O/NaZSM-5 ratio of 0–0.50 g/g) has been prepared. The mechanical mixture of CuCl₂-2H₂O and NaZSM-5 (CuCl₂·2H₂O/NaZSM-5 ratio of 0–0.50 g/g) shows characteristic XRD peaks of both NaZSM-5 and crystalline CuCl₂·2H₂O. Notably, after reaction of the above samples in a microwave oven for 10 min, the sample XRD patterns only exhibit the peaks assigned to NaZSM-5, while the peaks assigned to crystalline CuCl₂·2H₂O disappear completely, indicating that CuCl₂·2H₂O no longer exists in the crystalline state in the CuCl₂·2H₂O/NaZSM-5 samples. Additionally, in DTA curves, we cannot observe the melting point of CuCl₂ in a CuCl₂·2H₂O/NaZSM-5 sample (CuCl₂·2H₂O/NaZSM-5 ratio of 0–0.5 g/g) treated in a microwave oven, indicating that there is no CuCl₂ crystalline phase in the CuCl₂·2H₂O/NaZSM-5 samples (CuCl₂·2H₂O/NaZSM-5 ratio of 0–0.50 g/g).