Janus colloid surfactant catalysts for in situ organic reactions in Pickering emulsion microreactors

Abstract

Colloid surfactant catalysts are synthesized for the production of Pickering emulsion microreactors that exhibit outstanding catalytic activity and magnetic-responsive recovery performance.

Janus particles: from concepts to environmentally friendly materials and sustainable applications

“…introduced Janus colloid surfactant catalysts with magnetic responsiveness in Pickering emulsion microreactors [75]. The amphiphilic JPs patched with Pd or Ag NPs assembled at the reactant-water interface and enhanced the reaction kinetics and product yields [75].…”

“…introduced Janus colloid surfactant catalysts with magnetic responsiveness in Pickering emulsion microreactors [75]. The amphiphilic JPs patched with Pd or Ag NPs assembled at the reactant-water interface and enhanced the reaction kinetics and product yields [75]. By co-patching of the JPs with Fe 3 O 4 NP, the products could be easily separated and the JP catalysts were recovered and reused in up to five cycles without significant loss in reaction conversion [75].…”

Tandem Catalysis with Antagonistic Catalysts Compartmentalized in the Dispersed and Continuous Phases of a Pickering Emulsion

“…Furthermore, noninterference cannot always be avoided and catalystnon-compatibility in fact offers another main challenge for efficient tandem catalysis, for example when combining antagonistic catalysts such as an acid andabase. [18][19][20][21][22] For example, Resasco and coworkers reported on phase-selective catalysis using carbon nanotube-silica nanohybrids stabilized PEs in catalytic hydrogenationr eactions [23,24] andt he catalytic upgrading of biofuels by using hydrophobic zeolites acting as PE stabilizers. Various approaches have been taken towards the design of bifunctional acid-base catalysts, often relying on the spatial separation of the reactive entities on polymeric or oxidic support materials, [5,6] for example, in the form of yolk-shellm aterials, [7] metal-organic frameworks (MOFs), [8][9][10][11] shell cross-linked micelles, [12,13] or star polymers.…”

“…[18][19][20][21][22] For example, Resasco and coworkers reported on phase-selective catalysis using carbon nanotube-silica nanohybrids stabilized PEs in catalytic hydrogenationr eactions [23,24] andt he catalytic upgrading of biofuels by using hydrophobic zeolites acting as PE stabilizers. [18][19][20][21][22] For example, Resasco and coworkers reported on phase-selective catalysis using carbon nanotube-silica nanohybrids stabilized PEs in catalytic hydrogenationr eactions [23,24] andt he catalytic upgrading of biofuels by using hydrophobic zeolites acting as PE stabilizers.…”

“…[17] The PEs also offer wider stabilityw indows than traditional emulsions and are therefore highly interesting media for catalysis.Although PEs were invented in the early 1900s, their use as reactionm edia for catalysis is at opic that has only much more recently been explored. [18][19][20][21][22] For example, Resasco and coworkers reported on phase-selective catalysis using carbon nanotube-silica nanohybrids stabilized PEs in catalytic hydrogenationr eactions [23,24] andt he catalytic upgrading of biofuels by using hydrophobic zeolites acting as PE stabilizers. [25] Recently,Y ang et al were the first to use PE compartmentalization to perform varioust andemc atalytic reactions by using laminated w/o PEs.…”