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      Green synthesis of gold nanoparticles using aspartame and their catalytic activity for p-nitrophenol reduction

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          Abstract

          We demonstrated a facile and environmental-friendly approach to form gold nanoparticles through the reduction of HAuCl 4 by aspartame. The single-crystalline structure was illustrated by transmission electron microscopy (TEM) and X-ray diffraction (XRD). The energy-dispersive X-ray spectroscopy (EDS) and Fourier transform infrared (FTIR) results indicated that aspartame played a pivotal role in the reduction and stabilization of the gold crystals. The crystals were stabilized through the successive hydrogen-bonding network constructed between the water and aspartame molecules. Additionally, gold nanoparticles synthesized through aspartame were shown to have good catalytic activity for the reduction of p-nitrophenol to p-aminophenol in the presence of NaBH 4.

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          The online version of this article (doi:10.1186/s11671-015-0910-7) contains supplementary material, which is available to authorized users.

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          Spectral Properties and Relaxation Dynamics of Surface Plasmon Electronic Oscillations in Gold and Silver Nanodots and Nanorods

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            Green synthesis of gold nanoparticles using Trigonella foenum-graecum and its size-dependent catalytic activity.

            The development of new synthesis methods for monodispersed nanocrystals using cheap and nontoxic chemicals, environmentally benign solvents and renewable materials remains a challenge to the scientific community. Most of the current methods involve known protocols which may be potentially harmful to either environment or human health. Recent research has been focused on green synthesis methods to produce new nanomaterials, ecofriendly and safer with sustainable commercial viability. The present work reports the green synthesis of gold nanoparticles using the aqueous extract of fenugreek (Trigonella foenum-graecum) as reducing and protecting agent. The pathway is based on the reduction of AuCl(4)(-) by the extract of fenugreek. This method is simple, efficient, economic and nontoxic. Gold nanoparticles having different sizes in the range from 15 to 25 nm could be obtained by controlling the synthesis parameters. The nanoparticles have been characterized by UV-Visible spectroscopy, transmission electron microscopy (TEM), X-ray diffraction (XRD) and FTIR analysis. The high crystallinity of nanoparticles is evident from clear lattice fringes in the HRTEM images, bright circular spots in the SAED pattern and peaks in the XRD pattern. FTIR spectrum indicates the presence of different functional groups present in the biomolecule capping the nanoparticles. The synthesized gold nanoparticles show good catalytic activity for the reduction of 4-nitrophenol to 4-aminophenol by excess NaBH(4). The catalytic activity is found to be size-dependent, the smaller nanoparticles showing faster activity. Copyright © 2012 Elsevier B.V. All rights reserved.
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              Synthesis, characterization and catalytic activity of gold nanoparticles biosynthesized with Rhizopus oryzae protein extract

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                Author and article information

                Contributors
                apple_13201@163.com
                328942572@qq.com
                qiwei@tju.edu.cn
                tjuhrl@tju.edu.cn
                25852901@163.com
                surx@tju.edu.cn
                enzyme@tju.edu.cn
                Journal
                Nanoscale Res Lett
                Nanoscale Res Lett
                Nanoscale Research Letters
                Springer US (New York )
                1931-7573
                1556-276X
                8 May 2015
                8 May 2015
                2015
                : 10
                : 213
                Affiliations
                [ ]State Key Laboratory of Chemical Engineering, School of Chemical Engineering and Technology, Tianjin University, Tianjin, 300072 People’s Republic of China
                [ ]Collaborative Innovation Center of Chemical Science and Engineering (Tianjin), Tianjin, 300072 People’s Republic of China
                [ ]Tianjin Key Laboratory of Membrane Science and Desalination Technology, Tianjin, 300072 People’s Republic of China
                [ ]School of Environmental Science and Engineering, Tianjin University, Tianjin, 300072 People’s Republic of China
                [ ]Department of Bioengineering, College of Medicine, Southeast University, Nanjing, 210009 People’s Republic of China
                Article
                910
                10.1186/s11671-015-0910-7
                4431991
                25991916
                d5a5d439-e5bc-43c5-ac7e-948bbe0085fe
                © Wu et al.; licensee Springer. 2015

                This is an Open Access article distributed under the terms of the Creative Commons Attribution License ( http://creativecommons.org/licenses/by/4.0), which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly credited.

                History
                : 20 April 2015
                : 24 April 2015
                Categories
                Nano Express
                Custom metadata
                © The Author(s) 2015

                Nanomaterials
                gold nanoparticles,green synthesis,aspartame,catalysis
                Nanomaterials
                gold nanoparticles, green synthesis, aspartame, catalysis

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