Using palladium nanoparticle-decorated lysozyme amyloid fibrils to catalyze the reduction of methylene blue
Journal
Journal of the Taiwan Institute of Chemical Engineers
Journal Volume
118
Pages
187-195
Date Issued
2021
Author(s)
Abstract
Amyloid fibrils’ stable structure and nice biocompatibility make them good candidates as the templates used in engineering and biomedicine. While palladium nanoparticles have been widely used as catalysts, their high surface energy results in aggregation of nanoparticles, leading to decreased catalytic activities. Here, we investigated the catalytic performance of palladium nanoparticles-deposited lysozyme amyloid fibrils through the reduction of methylene blue (MB). The palladium nanoparticles-decorated lysozyme fibrils were first synthesized and then characterized using several analytical tools. The progress of reductive MB degradation in the presence of sodium borohydride was monitored via UV–Vis spectrophotometry to investigate the catalytic efficiency of bare palladium nanoparticles and palladium nanoparticle/lysozyme fibril hybrids under different conditions. The kinetic data were analyzed using a pseudo-first order model. Finally, the magnitudes of apparent rate constants under different conditions and associated activation parameters were determined. We found that the level of nanoparticle aggregation decreased and the degree of MB conversion significantly increased upon incorporation of amyloid fibrils as the supporting carriers. Moreover, a lower activation energy was perceived when MB reduction was catalyzed by the palladium nanoparticle/fibril hybrids as compared with the bare nanoparticle counterpart. This study presents a nice example of applying amyloid fibril-based hybrid materials in one of the important engineering fields - catalysis. ? 2021 Taiwan Institute of Chemical Engineers
Subjects
Activation energy; Biocompatibility; Catalysis; Catalyst activity; Enzymes; Glycoproteins; Hybrid materials; Nanoparticles; Palladium; Rate constants; Sodium Borohydride; Activation parameter; Apparent rate constant; Catalytic efficiencies; Catalytic performance; High surface energy; Nanoparticle aggregation; Palladium nanoparticles; VIS spectrophotometry; Synthesis (chemical)
SDGs
Type
journal article