Ionothermal Synthesis of High Silica Zeolites in Deep Eutectic Solvents (DES)

Phase-pure high silica zeolites have been synthesized using different deep eutectic solvents for the first time. ZSM-5 was made in tetrapropylammonium bromide/pentaerythritol. The reaction is affected by the amounts of seeding, water content, and organic structure-directing agent (SDA). Sodalite and ZSM-39 were prepared in tetramethylammonium chloride (TMACl)/1, 6-hexanediol by using the mineralizing agents NaOH and NH4F, respectively. In urea/choline chloride, ZSM-5, Beta, ZSM-39, and ZSM-11 were made by using different organic SDAs in the presence of fluoride. The reaction temperature and the choice of organic SDA affect the type of structures being produced. The crystallization of ZSM-39 in TMACl/1, 6-hexanediol was studied by powder X-ray diffraction, NMR spectroscopy, and SEM. Amorphous silica first arrange themselves around the TMA+ and then reorganize to form the larger cages. The larger cages are joined together as the smaller cages are formed, trapping the F- in the framework.

Name thesis:degree_name

M Sc

Discipline thesis:degree_discipline

Chemistry

Grantor dc:publisher

The University of Western Ontario

Year dc:date.issued

2012

Author dc:creator

• Lin, Zheng Sonia

Advisor dc:contributor.advisor

• Yining Huang

• ionic liquids
• deep eutectic solvents
• high-silica zeolites
• structure-directing agent

Language dc:language.iso

en_ca

Handle dc:identifier.uri

https://hdl.handle.net/20.500.14721/30356

OAI identifier oai:identifier

oai:uwo.scholaris.ca:20.500.14721/30356