Layer-by-layer deposition of silver/gold nanoparticles for catalytic reduction of nitroaromatics.
A general method has been fabricated to achieve normal as well as inverted core-shell architectures of silver/gold through a layer-by-layer deposition technique on a commercial anion exchange resin. Electrostatic field force of the charged resin beads supports immobilization of anionic metal precursors [MX(n)]-, in turn deposition of silver/gold nanoparticles onto the solid resin matrix and reduction of 2-nitrobenzoic acid to obtain the corresponding amines through effective catalysis. The shell thickness has been tailored made by exploiting a new method of cyclic and repetitive deposition of the desired metal precursors. Thermodynamic parameters for the reduction reaction have been presented. Kinetic study reveals a comparative account of rates between the mono- and bi-metallic nanoparticles where silver stands to be a better catalyst for the reduction of nitroaromatics.
Jana
Subhra
S
Department of Chemistry, Indian Institute of Technology, Kharagpur 721302, India.
Pande
Surojit
S
Sinha
Arun Kumar
AK
Sarkar
Sougata
S
Pradhan
Mukul
M
Basu
Mrinmoyee
M
Negishi
Yuichi
Y
Pal
Anjali
A
Pal
Tarasankar
T