Abstract
Segments of a p(NIPA-co-AMPS) hydrogel synthesized from N-isopropyl acrylamide (NIPA) and 2-acrylamido-2-methyl-1-propane sulfonic acid (AMPS) with N,. N'-methylenebis(acrylamide) (BIS) acting as cross-linker stabilized nickel nanoparticles (Ni-NPs) of uniform size in an aqueous solution. The rate of catalysis of the borohydride reduction of 4-nitrophenol to 4-aminophenol by these nanoparticles shows a complex temperature variation consistent with the hydrogel changing from a contracted to an expanded state below a lower critical solution temperature, LCST, of ~. 310. K. These observations provide insights into nanoparticle stabilization and catalysis and indicate potential pathways toward stable sophisticated nanoparticle catalysts for use in aqueous solution.
Original language | English (US) |
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Pages (from-to) | 1-4 |
Number of pages | 4 |
Journal | Colloids and Interface Science Communications |
Volume | 4 |
DOIs | |
State | Published - Jan 1 2015 |
All Science Journal Classification (ASJC) codes
- Biotechnology
- Physical and Theoretical Chemistry
- Surfaces, Coatings and Films
- Colloid and Surface Chemistry
- Materials Chemistry
Keywords
- Heterogeneous catalysis
- Hydrogels
- Nanoparticles
- Phase transitions