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NADPH-guided synthesis of iodide-responsive nanozyme: synergistic effects in nanocluster growth and peroxidase-like activity
Ist Teil von
Journal of materials science, 2021-03, Vol.56 (7), p.4909-4921
Ort / Verlag
New York: Springer US
Erscheinungsjahr
2021
Link zum Volltext
Quelle
SpringerLink
Beschreibungen/Notizen
Reduced coenzyme II acts as both reducing and capping agents in the growth of AgPd nanoclusters within a suitable range of [K
2
Pd(NO
2
)
4
]/[AgNO
3
]. A remarkable acceleration occurs in the growth kinetics of AgPd nanoclusters with respect to monometallic Pd or Ag. AgPd nanoclusters display a marked electron donation from Ag to Pd, thereby contributing to the enhancement of metallic Pd
0
atoms. The AgPd nanoclusters exhibit better peroxidase mimicking activities relative to their monometallic counterparts. Addition of iodide ions significantly inhibits the peroxidase mimicking activity of Ag
1
Pd
1
nanozyme. Hence, the Ag
1
Pd
1
-catalyzed oxidation of 3,3′,5,5′-tetramethylbenzidine by H
2
O
2
is greatly suppressed. The peroxidase-like activity of Ag
1
Pd
1
nanozyme exhibits a sensitive response to iodide ions in the range of 0.5 ~ 180 nM. AgPd nanozyme possesses a desirable selectivity toward iodide ions with respect to sulfide ions. This work would provide guidance for developing biomimetic nanomaterials in the areas of biosensing, separation, nanotechnology and green synthesis.
Graphical abstract