Open AccessLysimachia christinae polysaccharide mediated facile synthesis of gold-silver alloy nanoparticles for catalytic reduction of 4-nitrophenol
Author(s) -
Miao Liang,
Guo Zhang,
Yuan He,
Pei Hou,
Meng Li,
Bin Lv
Publication year - 2019
Publication title -
iop conference series. earth and environmental science
Language(s) - English
Resource type - Journals
eISSN - 1755-1307
pISSN - 1755-1315
DOI - 10.1088/1755-1315/330/4/042053
Subject(s) - alloy , materials science , nanoparticle , catalysis , 4 nitrophenol , colloidal gold , x ray photoelectron spectroscopy , silver nanoparticle , transmission electron microscopy , reducing agent , chemical engineering , nuclear chemistry , nanotechnology , chemistry , metallurgy , organic chemistry , engineering
We report here an environmentally benign and facile approach for the synthesis of gold-silver alloy nanoparticles. This approach involves the co-reduction of HAuCl 4 and AgNO 3 by employing Lysimachia christinae polysaccharide as both reductant and stabilizer without the introduction of any other surfactant. The formed gold-silver alloy nanoparticles exhibited relatively narrow distribution and good stability. Generation of the gold-silver alloy nanoparticles were observed by UV-vis spectroscopy, transmission electron microscopy, X-ray diffraction and X-ray photoelectron spectroscopy. The reaction of 4-nitrophenol reduction was employed to evaluate the catalytic property of gold-silver alloy nanoparticles, and it was found that the alloy nanoparticles χ Au = 0.5) have better catalytic performance than the corresponding monometallic nanoparticles.