The development of the sustainable synthesis of zeolites has become a very hot topic in\nrecent years. Herein, we report a sustainable route for synthesizing all-silica SOD zeolite under\nsolvent-free conditions. The method of solvent-free synthesis includes mixing, grinding, and heating\nraw solids. The all-silica SOD zeolite obtained was well characterized by multiple measurement\ntechniques (XRD, SEM, IR, thermogravimetric-differential thermal analysis (TG-DTA), and magic\nangel spinning nuclear magnetic resonance (MAS NMR)). The crystallization process of all-silica\nSOD zeolite was also investigated in detail by XRD, SEM, UV-Raman, and MAS NMR techniques.\nIn addition, the effects of the crystallization compositions, including the molar ratios of Na2O/SiO2\nand ethylene glycol/SiO2, on the synthesis of the pure all-silica SOD zeolite were investigated at\ndifferent temperatures.
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