| 초록 |
The synthesis and characterization of the gallosilicate analog of zeolites TNU-9 and TNU-10 are described. Under the synthesis conditions studied here, the SiO2/Al2O3 and NaOH/SiO2 ranges yielding pure gallosilicate TNU-9 and TNU-10 are narrow, which is the same trend as that observed for the synthesis oftheir aluminosilicate analog. The presence of Ga in the tetrahedral positions of these gallosilicates are evidenced by powder XRD, IR, and 29Si and 71Ga MAS NMR. In addition, the strength and concentration of acid sites in gallosilicate TNU-9 and TNU-10 were found to be considerably weak when compared to the aluminosilicate counterparts. |
