Green Synthesis of Gold Nanoparticles with Self-Sustained Natural Rubber Membranes

Green chemistry is an innovative way to approach the synthesis of metallic nanostructures employing eco-friendly substances (natural compounds) acting as reducing agents. Usually, slow kinetics are expected due to, use of microbiological materials. In this report we study composites of natural rubber (NR) membranes fabricated using latex fromHevea brasiliensistrees (RRIM 600) that works as reducing agent for the synthesis of gold nanoparticles. A straight and clean method is presented, to produce gold nanoparticles (AuNP) in a flexible substrate or in solution, without the use of chemical reducing reagents, and at the same time providing good size’s homogeneity, reproducibility, and stability of the composites.

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Green synthesis of colloidal silver nanoparticles using natural rubber latex extracted from Hevea brasiliensis

Spectrochimica Acta Part A Molecular and Biomolecular Spectroscopy ◽

10.1016/j.saa.2011.07.024 ◽

2011 ◽

Vol 82 (1) ◽

pp. 140-145 ◽

Cited By ~ 89

Author(s):

Eder José Guidelli ◽

Ana Paula Ramos ◽

Maria Elisabete D. Zaniquelli ◽

Oswaldo Baffa

Keyword(s):

Silver Nanoparticles ◽

Natural Rubber ◽

Green Synthesis ◽

Hevea Brasiliensis ◽

Natural Rubber Latex ◽

Colloidal Silver ◽

Rubber Latex ◽

Colloidal Silver Nanoparticles

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Synthesis of Gold Nanoparticles Using p-Aminobenzoic Acid and p-Aminosalicylic Acid as Reducing Agent

Indonesian Journal of Chemistry ◽

10.22146/ijc.26839 ◽

2019 ◽

Vol 19 (1) ◽

pp. 68

Author(s):

Abdul Aji ◽

Eko Sri Kunarti ◽

Sri Juari Santosa

Keyword(s):

Gold Nanoparticles ◽

Optimum Condition ◽

Reducing Agents ◽

Reducing Agent ◽

Hydroxyl Group ◽

Synthesis Process ◽

Aminobenzoic Acid ◽

Aminosalicylic Acid ◽

Amino Groups ◽

Transmission Electron

Synthesis of gold nanoparticles (AuNPs) by reduction of HAuCl4 with p-aminobenzoic acid and p-aminosalicylic acid as a reducing agent was investigated. This work was conducted in order to determine the optimum condition of AuNPs synthesis and examine the effect of the hydroxyl group in p-aminosalicylic acid towards the size, shape, and stability of the synthesized gold nanoparticles (AuNPs). The optimum condition of the gold nanoparticles synthesis was determined by UV/Vis spectrophotometer, the shape and size of gold nanoparticles were measured by Transmission Electron Microscope (TEM). The synthesis process was started by reacting HAuCl4 and the reducing agents in an aqueous solution at 86 ºC. The initial gold concentration, reducing agents concentration and pH were varied in order to obtain the optimum condition. In the optimum condition, the results showed that p-aminosalicylic acid containing both hydroxyl and amino groups performed higher reduction ability compared to p-aminobenzoic acid that only containing an amino group. Reducing agents which have a hydroxyl group (p-aminosalicylic acid) could produce AuNPs with a smaller concentration of HAuCl4 than p-aminobenzoic acid. Gold nanoparticles that were synthesized with p-aminosalicylic acid were more stable and had a smaller particle size compared to its counterpart that is synthesized with p-aminobenzoic acid.

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Upcycling of jellyfish (Nemopilema nomurai) sea wastes as highly valuable reducing agents for green synthesis of gold nanoparticles and their antitumor and anti-inflammatory activity

Artificial Cells Nanomedicine and Biotechnology ◽

10.1080/21691401.2018.1480490 ◽

2018 ◽

Vol 46 (sup2) ◽

pp. 1127-1136 ◽

Cited By ~ 9

Author(s):

Eun-Young Ahn ◽

Su Jung Hwang ◽

Myung-Jin Choi ◽

Seonho Cho ◽

Hyo-Jong Lee ◽

...

Keyword(s):

Gold Nanoparticles ◽

Green Synthesis ◽

Reducing Agents ◽

Inflammatory Activity ◽

Nemopilema Nomurai ◽

Anti Inflammatory

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Artificial Sweeteners and Sugar Ingredients as Reducing Agent for Green Synthesis of Silver Nanoparticles

Journal of Nanomaterials ◽

10.1155/2019/9641860 ◽

2019 ◽

Vol 2019 ◽

pp. 1-16 ◽

Cited By ~ 4

Author(s):

Shohreh Hemmati ◽

Erin Retzlaff-Roberts ◽

Corren Scott ◽

Michael T. Harris

Keyword(s):

Electron Microscopy ◽

Transmission Electron Microscopy ◽

Green Synthesis ◽

Reducing Agents ◽

Reducing Agent ◽

Artificial Sweeteners ◽

Silver Nanostructures ◽

Artificial Sweetener ◽

Transmission Electron ◽

Vis Spectroscopy

An environmentally friendly technique has been developed to produce metal nanoparticles using green synthesis methods. In this study, silver nanostructures were synthesized using different sugar substitutes and artificial sweeteners as green reducing agents in an aqueous solution at low temperature. The main ingredients (such as maltodextrin, sucrose, saccharin, and sucralose) of the artificial sweeteners acting as reducing agents were used to reduce Ag+ ions to Ag0. The pH of the solution was controlled during synthesis through the addition of sodium hydroxide (NaOH) to increase the strength of the reducing agents by converting nonreducing sugars to reducing ones and consequently increasing the rate of silver nanoparticle formation. The size and morphology of the synthesized nanostructures were characterized by transmission electron microscopy (TEM), high-resolution transmission electron microscopy (HRTEM), scanning electron microscopy (SEM), and energy-dispersive X-ray spectroscopy (EDX). The formation of nanostructures during the course of the reactions was investigated by UV-visible (UV-vis) spectroscopy characterization of an aliquot of sample at specific intervals. The function of each artificial sweetener and corresponding ingredients as a reducing agent and capping agent was investigated by Fourier-transform infrared spectroscopy (FTIR) and mass spectrometry (MS).

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