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- W785507752 abstract "Abstract This paper reports the impact of oxidative etching of Au nanospheres and nanorods by KMnO 4 on their surface morphology, electro-kinetic properties and catalytic activity. A significant blue-shift of the surface plasmon bands for Au nanospheres (536 to 527 nm) and Au nanorods (679 to 532 nm) were observed, due to their size and shape alterations after oxidative dissolution. TEM analysis also revealed the formation of various irregular Au nano-morphologies such as spheres (∼4-7 nm), low aspect ratio rods (2.6) and spheroids (∼13 nm) of narrow size distribution after KMnO 4 etching. As a result, the hydrodynamic diameter of Au nanospheres (∼41 nm) and Au nanorods (∼109 nm) were reduced to ∼4 nm and ∼34 nm, respectively. The oxidative dissolution of Au 0 by KMnO 4 occurred via its oxidation to Au 3+ ions as confirmed by the measured electrode potential, E 0 (Au 0 /Au 3+ ) = -0.90 V by cyclic voltammetry with significant increase in the zeta potential and conductance values. The etched Au nanoparticles being smaller in size and of higher surface to volume ratio resulted in ∼ 2 fold higher catalytic activities for the reduction of p -nitrophenol and p -nitrobenzoic acid as compared to bare unetched Au nanostructures." @default.
- W785507752 created "2016-06-24" @default.
- W785507752 creator A5031454160 @default.
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- W785507752 date "2015-11-01" @default.
- W785507752 modified "2023-10-02" @default.
- W785507752 title "Influence of Oxidative Etching of Au Nanostructures by KMnO4 on its Surface Morphology, Electro-kinetic Properties and Improved Catalytic Activity" @default.
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- W785507752 doi "https://doi.org/10.1016/j.jiec.2015.06.027" @default.
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