Green synthesis of Au–Ag alloy nanoparticles using Cacumen platycladi extract

An environmentally-friendly method for the synthesis of Au–Ag alloy nanoparticles with controlled composition is proposed. The method involves the simultaneous bioreduction of HAuCl4 and AgNO3 using Cacumen Platycladi leaf extract at 90 °C. The formation of the Au–Ag alloy nanoparticles was monitored by recording the absorbance, using UV-visible light spectroscopy as a function of the reaction time and the formation process. The as-synthesized nanoparticles were characterized by X-ray diffraction, transmission electron microscopy, energy-dispersive X-ray spectroscopy, and X-ray photoelectron spectroscopy to verify the nature of the alloy. The Fourier transform infrared spectra show that the CC, N–H, (NH) CO, and –OH groups in the C. Platycladi extract served as a reducing agent, whereas the peptides or proteins prevented the aggregation of alloy nanoparticles. The process can be described as a purely “green technique” because no additional synthetic reagents were used as reductants or stabilizers.

[1]  S. Maenosono,et al.  X-ray Absorption Near-Edge Structure and X-ray Photoelectron Spectroscopy Studies of Interfacial Charge Transfer in Gold–Silver–Gold Double-Shell Nanoparticles , 2012 .

[2]  D. Pang,et al.  Synthesis of sub-5 nm Au–Ag alloy nanoparticles using bio-reducing agent in aqueous solution , 2011 .

[3]  I. Parkin,et al.  One‐Pot Synthesis of Core‐Shell Silver‐Gold Nanoparticle Solutions and Their Interaction with Methylene Blue Dye , 2011 .

[4]  Jiale Huang,et al.  Green synthesis of Au–Pd bimetallic nanoparticles: Single-step bioreduction method with plant extract , 2011 .

[5]  Dingsheng Wang,et al.  Bimetallic Nanocrystals: Liquid‐Phase Synthesis and Catalytic Applications , 2011, Advanced materials.

[6]  R. A. Laskar,et al.  Biogenic synthesis of Ag, Au and bimetallic Au/Ag alloy nanoparticles using aqueous extract of mahogany (Swietenia mahogani JACQ.) leaves. , 2011, Colloids and surfaces. B, Biointerfaces.

[7]  Yao Zhou,et al.  Biosynthesis of Gold Nanoparticles by Foliar Broths: Roles of Biocompounds and Other Attributes of the Extracts , 2010, Nanoscale research letters.

[8]  Jiale Huang,et al.  Green synthesis of palladium nanoparticles using broth of Cinnamomum camphora leaf , 2010 .

[9]  Qingbiao Li,et al.  The biosynthesis of palladium nanoparticles by antioxidants in Gardenia jasminoides Ellis: long lifetime nanocatalysts for p-nitrotoluene hydrogenation , 2009, Nanotechnology.

[10]  Ajay Misra,et al.  GREEN SYNTHESIS OF SILVER NANOPARTICLES USING LATEX OF JATROPHA CURCAS , 2009 .

[11]  Shouheng Sun,et al.  Synthesis of AuAg alloy nanoparticles from core/shell-structured Ag/Au. , 2009, Small.

[12]  D. Su,et al.  Synthesis of Thermally Stable and Highly Active Bimetallic Au−Ag Nanoparticles on Inert Supports , 2009 .

[13]  H. Yin,et al.  One-Pot Synthesis of Oleylamine Coated AuAg Alloy NPs and Their Catalysis for CO Oxidation , 2009 .

[14]  B. Kim,et al.  Biological synthesis of bimetallic Au/Ag nanoparticles using Persimmon (Diopyros kaki) leaf extract , 2008 .

[15]  Jiale Huang,et al.  Continuous-Flow Biosynthesis of Silver Nanoparticles by Lixivium of Sundried Cinnamomum camphora Leaf in Tubular Microreactors , 2008 .

[16]  A. Venkataraman,et al.  Biosynthesis and stabilization of Au and Au–Ag alloy nanoparticles by fungus, Fusarium semitectum , 2008, Science and technology of advanced materials.

[17]  R. Johnston,et al.  Nanoalloys: from theory to applications of alloy clusters and nanoparticles. , 2008, Chemical reviews.

[18]  Chris Boothroyd,et al.  Size and composition tunable Ag–Au alloy nanoparticles by replacement reactions , 2007 .

[19]  Peidong Yang,et al.  Shaping binary metal nanocrystals through epitaxial seeded growth. , 2007, Nature materials.

[20]  Jiale Huang,et al.  Biosynthesis of silver and gold nanoparticles by novel sundried Cinnamomum camphora leaf , 2007 .

[21]  Tomoya Uruga,et al.  Bioreductive deposition of platinum nanoparticles on the bacterium Shewanella algae. , 2007, Journal of biotechnology.

[22]  Joseph M. McLellan,et al.  Synthesis of palladium icosahedra with twinned structure by blocking oxidative etching with citric acid or citrate ions. , 2007, Angewandte Chemie.

[23]  Jie Fu,et al.  A simple and green method for the synthesis of Au, Ag, and Au-Ag alloy nanoparticles , 2006 .

[24]  H. B. Liu,et al.  Biosynthesis and characterization of Ti/Ni bimetallic nanoparticles , 2006 .

[25]  I. Willner,et al.  Growing Metal Nanoparticles by Enzymes , 2006 .

[26]  Satyajyoti Senapati,et al.  Extracellular biosynthesis of bimetallic Au-Ag alloy nanoparticles. , 2005, Small.

[27]  Yong Yang,et al.  Spectroscopic characterization of Au3+ biosorption by waste biomass of Saccharomyces cerevisiae. , 2005, Spectrochimica acta. Part A, Molecular and biomolecular spectroscopy.

[28]  Aiqin Wang,et al.  Synergistic effect in an Au-Ag alloy nanocatalyst: CO oxidation. , 2005, The journal of physical chemistry. B.

[29]  Absar Ahmad,et al.  Rapid synthesis of Au, Ag, and bimetallic Au core-Ag shell nanoparticles using Neem (Azadirachta indica) leaf broth. , 2004, Journal of colloid and interface science.

[30]  Z. Bastl,et al.  Bimetallic (Ag)Au nanoparticles prepared by the seed growth method: two-dimensional assembling, characterization by energy dispersive X-ray analysis, X-ray photoelectron spectroscopy, and surface enhanced raman spectroscopy, and proposed mechanism of growth. , 2004, Langmuir : the ACS journal of surfaces and colloids.

[31]  Jie Fu,et al.  Completely "green" synthesis and stabilization of metal nanoparticles. , 2003, Journal of the American Chemical Society.

[32]  K. Schulten,et al.  Molecular biomimetics: nanotechnology through biology , 2003, Nature materials.

[33]  R. Mitrić,et al.  Structural properties and reactivity of bimetallic silver-gold clusters , 2003 .

[34]  Catherine J. Murphy,et al.  Solution-Phase Synthesis of Sub-10 nm Au−Ag Alloy Nanoparticles , 2002 .

[35]  Charles F Vardeman,et al.  Size-dependent spontaneous alloying of Au-Ag nanoparticles. , 2002, Journal of the American Chemical Society.

[36]  T. Pradeep,et al.  Coalescence of Nanoclusters and Formation of Submicron Crystallites Assisted by Lactobacillus Strains , 2002 .

[37]  M. Moskovits,et al.  Bimetallic Ag–Au nanoparticles: Extracting meaningful optical constants from the surface-plasmon extinction spectrum , 2002 .

[38]  Dong-Hwang Chen,et al.  Formation and characterization of Au–Ag bimetallic nanoparticles in water-in-oil microemulsions , 2002 .

[39]  Chuan-Jian Zhong,et al.  Core–Shell Assembled Nanoparticles as Catalysts , 2001 .

[40]  W. Cai,et al.  Composition modulation of optical absorption in AgxAu1−x alloy nanocrystals in situ formed within pores of mesoporous silica , 2000 .

[41]  E Olsson,et al.  Silver-based crystalline nanoparticles, microbially fabricated. , 1999, Proceedings of the National Academy of Sciences of the United States of America.

[42]  D. Dickson,et al.  Nanostructured magnetism in living systems , 1999 .

[43]  S. Macnaughton,et al.  Developments in terrestrial bacterial remediation of metals. , 1999, Current opinion in biotechnology.

[44]  D. Pum,et al.  Crystalline bacterial cell surface layers (s layers): from supramolecular cell structure to biomimetics and nanotechnology. , 1999, Angewandte Chemie.

[45]  Han,et al.  Dodecanethiol-Derivatized Au/Ag Bimetallic Nanoparticles: TEM, UV/VIS, XPS, and FTIR Analysis. , 1998, Journal of colloid and interface science.

[46]  R. Murray,et al.  Stable, monolayer-protected metal alloy clusters [18] , 1998 .

[47]  H. Remita,et al.  Dose Rate Effects on Radiolytic Synthesis of Gold-Silver Bimetallic Clusters in Solution , 1998 .

[48]  G. Schmid,et al.  Hydrosilation Reactions Catalyzed by Supported Bimetallic Colloids , 1997 .

[49]  Paul Mulvaney,et al.  Surface Plasmon Spectroscopy of Nanosized Metal Particles , 1996 .

[50]  M. Boudart,et al.  STRUCTURE OF SUPPORTED PDAU CLUSTERS DETERMINED BY X-RAY ABSORPTION SPECTROSCOPY , 1994 .

[51]  R. Mehra,et al.  Metal ion resistance in fungi: Molecular mechanisms and their regulated expression , 1991, Journal of cellular biochemistry.

[52]  Derek R. Lovley,et al.  Anaerobic production of magnetite by a dissimilatory iron-reducing microorganism , 1987, Nature.

[53]  D. Astruc,et al.  Gold nanoparticles: assembly, supramolecular chemistry, quantum-size-related properties, and applications toward biology, catalysis, and nanotechnology. , 2004, Chemical reviews.

[54]  H. Remita,et al.  Dose Rate Effect on Bimetallic Gold-Palladium Cluster Structure , 2003 .

[55]  Dietmar Pum,et al.  The application of bacterial S-layers in molecular nanotechnology , 1999 .