Metal Nanoparticles/Ionic Liquid/Cellulose: Polymeric Membrane for Hydrogenation Reactions

Abstract

Rhodium and platinum nanoparticles were supported in polymeric membranes with 10, 20 and 40 μm thickness. The polymeric membranes were prepared combining cellulose acetate and the ionic liquid (IL) 1-n-butyl-3-methylimidazolium bis(trifluoromethane sulfonyl)imide (BMI.(NTf) 2 . The presence of metal nanoparticles induced an increase in the polymeric membrane surface areas. The increase of the IL content resulted in an improvement of elasticity and decrease in tenacity and toughness, whereas the stress at break was not affected. The presence of IL probably causes an increase in the separation between the cellulose molecules that result in a higher flexibility and processability of the polymeric membrane. The CA/IL/M(0) combinations exhibit an excellent synergistic effect that enhances the activity and durability of the catalyst for the hydrogenation of cyclohexene. The CA/IL/M(0) polymeric membrane displays higher catalytic activity (up to 7.353 h -1 ) for the 20 mm of CA/IL/Pt(0) and stability than the nanoparticles dispersed only in the IL.

Iridium nanoparticles supported in polymeric membranes: a new material for hydrogenation reactions

“…The metal concentration incorporated in the polymeric membrane is related to the thickness of the membrane; it was observed that, for thickness up to 20 mm, the materials is saturated by 10 mg of nanoparticles. 46 The presence of the IL in the polymeric membranes was conrmed by the stretching band at 3170 cm À1 , which is due to presence of aromatic C-H groups. Aer impregnation of the IL in the polymeric membranes, a signicant decrease is observed in the intensity of the band at 3400 cm À1 , which is attributed to the -OH stretching of the pure cellulose acetate, indicating participation of the -OH group in the interaction with the IL (see Fig.…”

Au Nanoparticles in Ionic Liquid Supported on Biopolymeric Films: A Practical Lesson for Investigation of Antimicrobial Activity

“…18,19 Recentemente também foi demonstrado que a combinação de NPs metálicas estáveis em líquidos iônicos (LIs) com um filme polimérico de celulose pode gerar um material novo e versátil. 20 Nestas práticas experimentais, nós demonstramos a combinação de NPs de Au sintetizadas em líquido iônico BMI. PF 6 suportadas em filme biopolimérico de acetato de celulose com investigação em atividade antimicrobiana frente as bactérias S. aureus e E. coli.…”