Synthesis and Performance of NaA/MCM-48 Micro-mesoporous Composite Molecular Sieve

摘要

NaA/MCM-48 micro-mesoporous molecular sieve was prepared at 100°C for 72 h by hydrothermal synthesis method, where chemicals with a equivalent ratio of n (SiO_2):n (CTAB):n (H_2O):n (NaOH) is 1:0.45:60:0.48 were added to NaA microporous molecular sieve prepared hydrothermally at 100°C for 5 h from a composite solution with a equivalent ratio of Na_2O:SiO_2:Al_2O_3:H_2O is 3:2:1:200. The adsorption of the NaA/MCM-48 micro-mesoporous molecular sieve to cationic red X-5GN simulated dye existing in the waste water showed that, in 50 mL of 20 mg/L cationic red X-5GN solution, under the optimal conditions of a dosage of NaA/MCM-48 micro-mesoporous composite molecular sieve of 1.8g/L, a pH of 7 and an oscillation time of 30min, the decoloration rate of spent solution was above 82.5%. The XRD, SEM and TEM processes were adopted for its characterization to display the possible reasons.