TY - JOUR
T1 - Fibrous silver particles prepared from layered silver alkanethiolates and their catalytic property
AU - Kim, Min Kyu
AU - Gwak, Gyeong Hyeon
AU - Oh, Jae Min
N1 - Publisher Copyright:
Copyright © 2017 American Scientific Publishers All rights reserved.
PY - 2017
Y1 - 2017
N2 - We have prepared fibrous silver particles (FSPs) by reducing layered silver alkanethiolates (LSTs) having various alkyl chain length. According to powder X-ray diffraction and infrared spectra, LSTs had lamellar structure with different interlayer distance with respect to alkyl chain length. Microscopic study revealed that LSTs particles had flat shape with hundreds of nanometers diameter and tens of nanometers thickness, regardless of alkyl chain length. Upon reductive calcination at 400°C under H2 flow, LSTs transformed to face centered cubic Ag fiber having bundle of Ag filaments having ∼1 μm diameter. Through Scherrer's equation, microscopic analyses and N2 adsorption-desorption isotherm, it was revealed that silver nanoparticle preferentially aggregated to one direction during reduction to form FSPs, and molecules could access through the inter-particle space in the aggregates. Conversion of 4-nitrophenol to 4-aminophenol catalyzed by FSPs was analyzed with Langmuir-Hinshelwood model. It was found that FSPs had similar or higher catalytic reaction rate compared with Ag nanoparticles. Furthermore, FSPs were found to possess high recyclability by showing continuous catalytic activity after 5 catalytic reactions.
AB - We have prepared fibrous silver particles (FSPs) by reducing layered silver alkanethiolates (LSTs) having various alkyl chain length. According to powder X-ray diffraction and infrared spectra, LSTs had lamellar structure with different interlayer distance with respect to alkyl chain length. Microscopic study revealed that LSTs particles had flat shape with hundreds of nanometers diameter and tens of nanometers thickness, regardless of alkyl chain length. Upon reductive calcination at 400°C under H2 flow, LSTs transformed to face centered cubic Ag fiber having bundle of Ag filaments having ∼1 μm diameter. Through Scherrer's equation, microscopic analyses and N2 adsorption-desorption isotherm, it was revealed that silver nanoparticle preferentially aggregated to one direction during reduction to form FSPs, and molecules could access through the inter-particle space in the aggregates. Conversion of 4-nitrophenol to 4-aminophenol catalyzed by FSPs was analyzed with Langmuir-Hinshelwood model. It was found that FSPs had similar or higher catalytic reaction rate compared with Ag nanoparticles. Furthermore, FSPs were found to possess high recyclability by showing continuous catalytic activity after 5 catalytic reactions.
KW - Fibrous silver particle
KW - Heterogeneous catalyst
KW - Layered silver alkanethiolate
KW - Nanoparticle
KW - Reductive calcination
UR - http://www.scopus.com/inward/record.url?scp=85015674302&partnerID=8YFLogxK
U2 - 10.1166/jnn.2017.12801
DO - 10.1166/jnn.2017.12801
M3 - Article
AN - SCOPUS:85015674302
SN - 1533-4880
VL - 17
SP - 3581
EP - 3587
JO - Journal of Nanoscience and Nanotechnology
JF - Journal of Nanoscience and Nanotechnology
IS - 5
ER -