DocumentCode :
3612146
Title :
Biosynthesised palladium nanoparticles using Eucommia ulmoides bark aqueous extract and their catalytic activity
Author :
Liansheng Duan ; Ming Li ; Huihong Liu
Author_Institution :
Coll. of Chem. & Chem. Eng., Wuhan Textile Univ., Wuhan, China
Volume :
9
Issue :
6
fYear :
2015
Firstpage :
349
Lastpage :
354
Abstract :
Palladium nanoparticles (PdNPs) are of great importance as catalytic materials. Their synthesis has been widely studied and interest in their properties is growing. Bio-based methods might be a greener option for designing the PdNPs with reduced environmental impacts. This study reports the synthesis of PdNPs by utilising the aqueous extract of medicinally important Eucommia ulmoides (E. Ulmoides) bark which functions as both reducing and capping agent in moderate reaction conditions. Reduction potential of E. Ulmoides bark aqueous extract was about -0.08 V vs. saturated calomel electrode by open-circuit voltage method and the rich polyphenolics was confirmed by cyclic voltammetry, which helps to reduce palladium ions to PdNPs. The characterisation through high-resolution transmission electron microscopic, energy dispersive X-ray spectroscopy and X-ray diffraction infer that the as-synthesised PdNPs were spherical in shape with a face cubic crystal structure. The results from dynamic light scattering suggest the PdNPs have the narrow size distribution with an average size of 12.6 nm. The lower zeta potential (-25.3 mV) and the Fourier transform infrared spectra indicate that the as-synthesised PdNPs keep remarkably stable for a long period due to the capped biomolecules on the nanoparticle surface. This method for synthesis of PdNPs is simple, economic, non-toxic and efficient. The PdNPs show excellent catalytic activity for the electro-catalytic oxidation of hydrazine and the catalytic reducing degradation of p-aminoazobenzene, a model compound of azo-dyes.
Keywords :
Fourier transform infrared spectra; X-ray chemical analysis; X-ray diffraction; biochemistry; catalysis; dyes; nanomedicine; nanoparticles; oxidation; palladium; voltammetry (chemical analysis); E. Ulmoides; Eucommia ulmoides bark aqueous extract; Fourier transform infrared spectra; Pd; PdNPs; X-ray diffraction; azo-dyes; bio-based methods; biosynthesised palladium nanoparticles; capped biomolecules; catalytic activity; catalytic materials; cyclic voltammetry; dynamic light scattering; electro-catalytic oxidation; energy dispersive X-ray spectroscopy; face cubic crystal structure; high-resolution transmission electron microscopy; hydrazine; medicinally important Eucommia ulmoides; moderate reaction conditions; nanoparticle surface; open-circuit voltage method; p-aminoazobenzene; reduced environmental impacts; rich polyphenolics; saturated calomel electrode; zeta potential;
fLanguage :
English
Journal_Title :
Nanobiotechnology, IET
Publisher :
iet
ISSN :
1751-8741
Type :
jour
DOI :
10.1049/iet-nbt.2015.0020
Filename :
7350266
Link To Document :
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