Synthesis and characterization of ZIF-8 structure for CO2 reduction: an operando study

• Grant number: 24/02143-8
• Support Opportunities: Scholarships in Brazil - Scientific Initiation
• Start date: April 01, 2024
• End date: March 31, 2026
• Field of knowledge: Engineering - Chemical Engineering - Chemical Technology
• Principal Investigator: Luiz Gustavo Possato
• Grantee: Iasmin Soares de Lima
• Host Institution: Faculdade de Ciências (FC). Universidade Estadual Paulista (UNESP). Campus de Bauru. Bauru , SP, Brazil
• Associated research grant: 21/05246-4 - In situ and operando studies of heterogeneous catalysts for CO2 conversion, AP.JP

Abstract

ZIFs, zeolitic imidazolate framework, are subsets of structures that arise from MOFs and have recently gained an essential role in the development of materials as they have high thermal stability compared to other MOF structures (up to 400°C), stability chemistry, and a large surface area. ZIFs have a structure tetrahedral, analogous to zeolitic structures, formed by ions of a cation bivalent (Zn2+, Co2+, Ni2+) and the ligand 2-methylimidazole. With these physical and chemical characteristics, ZIFs have potential applications in reactions involving the reduction of CO2. It is known that the stability of ZIF structures is directly related to the size of the crystals. However, smaller crystals may present structural defects, such as positive vacancies for catalytic activity. Therefore, this project's main objectives are the synthesis of the ZIF-8 structure, known for its high stability, with the use and monitoring by spectroscopy In situ Raman; use of Raman spectroscopy to verify stability structural during catalytic activity, an operating condition; and the determination of the correlation between crystal size and catalytic activity.