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Publish Date: June 13, 2024, 7:20 am

Seminar by Dr. Iva Manasi on "Micelle Templated Synthesis of Porous Ceria using Deep Eutectic Solvent" December 22, 2022 (Thursday) at 3:30 PM, Dept. of Chem. Committee room

The Department of Chemistry, IIT Delhi cordially invites you to attend a seminar by Dr. Iva Manasi from the Department of Chemistry, University of Bath, UK. The details of the talk are given below:

Date and time: December 22, 2022 (Thursday) at 3:30 PM.

Venue- Department of Chemistry Committee room

Title: Micelle Templated Synthesis of Porous Ceria using Deep Eutectic Solvent

Speaker: Iva Manasi, PhD

Affiliation: Department of Chemistry, University of Bath, Claverton Down, Bath, UK

 Abstract:

Deep eutectic solvents (DES) are mixtures of hydrogen bond donors and acceptors that form strongly hydrogen-bonded room temperature liquids. They comprise cheap environmentally friendly components and have tuneable physicochemical properties making them viable green solvents. They are used in a range of applications from electrochemistry and material synthesis to drug delivery and biomolecule extraction. Recently DES have been used in solvothermal synthesis of nanoparticles opening up the field of templated synthesis in these solvents using self-assembled surfactant structures as porosity generators.

In this work we have studied and exploited surfactant self-assembly in a Type IV DES comprising metal salt, cerium nitrate hexahydrate, and urea for synthesis of porous cerium oxide. We have investigated micelle formation for cationic (C12TAB, C12TANO3, C16TAB, C16TANO3), anionic (SDS) and non-ionic (C12EO6, C16EO8) surfactants in the DES.[1] This is the first reported surfactant study in a Type IV DES and first evidence of non-ionic surfactant micellization in DES, which were so far considered insoluble in DES. Furthermore, we report atom efficient synthesis of crystalline, mesoporous cerium oxide from the Type IV DES wherein cerium acts both as a reactant and as a constituent of the solvent medium using a novel, low temperature and green solvothermal method.[2] Using high concentration micellar solutions of the C12 and C16 alkyl chain cationic surfactants and non-ionic surfactant in the DES we can alter the porosity of the cerium oxide so-produced providing avenues for controlled material synthesis nanoarchitecture in these solvents.

[1] Manasi et al., J. Chem. Phys. 155, 084902 (2021).

[2] Manasi et al., J. Mater. Chem. A10, 18422 (2022).

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