Gold Nanoparticles Confined in Vertically Aligned Silica Nanochannels and Their Electrocatalytic Activity Toward Ascorbic Acid | Zendy

Ding Longhua | Zendy; Li Wanzhen | Zendy; Sun Qinqin | Zendy; He Yayun | Zendy; Su Bin | Zendy

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Gold Nanoparticles Confined in Vertically Aligned Silica Nanochannels and Their Electrocatalytic Activity Toward Ascorbic Acid

Author(s) -

Ding Longhua,

Li Wanzhen,

Sun Qinqin,

He Yayun,

Su Bin

Publication year - 2014

Publication title -

chemistry – a european journal

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 1.687

H-Index - 242

eISSN - 1521-3765

pISSN - 0947-6539

DOI - 10.1002/chem.201403426

Subject(s) - ascorbic acid , materials science , colloidal gold , mesoporous silica , silane , electrode , nanoparticle , electrochemistry , chemical engineering , mesoporous material , nanotechnology , layer (electronics) , catalysis , chemistry , organic chemistry , composite material , food science , engineering

A facile method of confining gold nanoparticles (AuNPs) in silica nanochannels aligned perpendicularly to an underlying electrode surface is reported. The nanochannel surface carrying a layer of (3‐aminopropyl)triethoxy silane (APTS) displays a strong electrostatic interaction with AuCl 4 − , eventually resulting in the confinement of AuNPs inside the nanochannels after chemical reduction. As‐prepared AuNPs in APTS‐modified mesoporous silica film (APTS‐MSF) are highly dispersed with a narrow size distribution. Furthermore, these AuNPs are free of protecting ligands and exhibit a good electrochemical catalytic activity toward the oxidation of ascorbic acid.

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