Sized-Controlled ZIF-8 Nanoparticle Synthesis from Recycled Mother Liquors: Environmental Impact Assessment

Marta García-Palacín, José Ignacio Martínez, Lorena Paseta, Adam Deacon, Timothy Johnson, Magdalena Malankowska, Carlos Téllez, Joaquín Coronas
2020 ACS Sustainable Chemistry and Engineering  
The effect of different deprotonators as well as washing steps and drying procedure on the synthesis of ZIF-8 from the mother liquor was investigated. The morphology, thermal stability, crystallinity, and surface area of the synthesized MOF were investigated. In addition, life-cycle assessment (LCA) or, in other words, eco-balance, was implemented as well. LCA compares the full range of environmental effects associated with the product by evaluating all inputs and outputs of material flows and
more » ... redicting how such flow will affect the environment. ZIF-8 nanocrystals were synthesized from the recycled mother liquors using NaOH or NH4OH thus preserving the main characteristics of the ZIF-8 nanoparticles derived from the initial synthesis. The rest of the characterization methods confirmed the suitability of the synthesis methodology considering the phase purity of the obtained ZIF-8 and nanometer size particles. This procedure enabled us not only to obtain phase pure ZIF-8 but also to substantially decrease the amount of solvent used for washing making it a sustainable process.
doi:10.1021/acssuschemeng.9b07593 pmid:32953286 pmcid:PMC7493283 fatcat:da34xwjwfbewhb7fbevyvl3rom