On the Synthesis of Au Nanoparticles Using EDTA as a Reducing Agent

2013 ◽  
Vol 117 (40) ◽  
pp. 20958-20966 ◽  
Author(s):  
Hélène Dozol ◽  
Guillaume Mériguet ◽  
Bernard Ancian ◽  
Valérie Cabuil ◽  
Haolan Xu ◽  
...  
Keyword(s):  
Au Nanoparticles ◽  
Reducing Agent

Deposition of Au nanoparticles inside porous CeO2 nanocubes using Langmuir–Blodgett technique

2018 ◽  
Vol 42 (2) ◽  
pp. 1379-1386 ◽  
Author(s):  
Subhasis Das ◽  
Gourab Bhattacharjee ◽  
Biswarup Satpati ◽  
Mukesh Kumar ◽  
Sasanka Deka ◽  
...  
Keyword(s):  
Au Nanoparticles ◽  
Dual Role ◽  
Reducing Agent ◽  
Langmuir Blodgett

AuCl4-ions are reduced to Au0 inside the pores of CeO2 nanocubes by oleylamine, which has the dual role of capping and reducing agent.

Sodium citrate: A universal reducing agent for reduction / decoration of graphene oxide with au nanoparticles

Nano Research ◽  
2011 ◽  
Vol 4 (6) ◽  
pp. 599-611 ◽  
Author(s):  
Zhe Zhang ◽  
Huihui Chen ◽  
Chunyan Xing ◽  
Mingyi Guo ◽  
Fugang Xu ◽  
...  
Keyword(s):  
Graphene Oxide ◽  
Sodium Citrate ◽  
Au Nanoparticles ◽  
Reducing Agent

Development and application of a nanocomposite derived from crosslinked HPMC and Au nanoparticles for colon targeted drug delivery

RSC Advances ◽  
2015 ◽  
Vol 5 (35) ◽  
pp. 27481-27490 ◽  
Author(s):  
Raghunath Das ◽  
Dipankar Das ◽  
Paulomi Ghosh ◽  
Santanu Dhara ◽  
Asit Baran Panda ◽  
...  
Keyword(s):  
Drug Delivery ◽  
Targeted Drug Delivery ◽  
Au Nanoparticles ◽  
Methyl Cellulose ◽  
Reducing Agent ◽  
Hydroxypropyl Methyl Cellulose ◽  
Targeted Drug ◽  
Poly Acrylamide

Herein, we report a novel route for the synthesis of poly(acrylamide) (PAAm) crosslinked hydroxypropyl methyl cellulose/Au nanocomposite where chemically crosslinked HPMC (c-HPMC) works as a reducing agent.

Controlled synthesis of Pd and Pd–Au nanoparticles: effect of organic amine and silanol groups on morphology and polycrystallinity of nanomaterials

RSC Advances ◽  
2015 ◽  
Vol 5 (15) ◽  
pp. 10964-10973 ◽  
Author(s):  
Prem C. Pandey ◽  
Richa Singh
Keyword(s):  
Au Nanoparticles ◽  
Specific Interaction ◽  
Reducing Agent ◽  
Controlled Synthesis ◽  
Organic Amine ◽  
Silanol Groups ◽  
New Process

New process for 3-APTMS and organic reducing agent mediated synthesis of amphiphilic PdNPs, Pd-Au/Au-Pd justifying specific interaction of silanol with PdNPs controlling polycrystallinity, nanogeometry, morphology and functionality.

Synthesis and Properties of Au Nanoparticles with Various Sizes

2013 ◽  
Vol 710 ◽  
pp. 117-121 ◽  
Author(s):  
Yuan Na Zhu ◽  
Yong Qiang Cao ◽  
Ai Yu Zhang ◽  
Ping Yang
Keyword(s):  
Raman Scattering ◽  
Au Nanoparticles ◽  
Particle Diameter ◽  
Trisodium Citrate ◽  
Reducing Agent ◽  
Molar Ratio ◽  
Chloroauric Acid ◽  
Au Nps ◽  
Transmission Electron ◽  
Nir Absorption

Properties of Au nanoparticles (NPs) caused by various sizes (5-12 nm) were studied in this article. Au NPs capped with citrate of various sizes were synthesized by two methods including trisodium citrate dihydrate reduction of chloroauric acid tetrahydrate and sodium borohydride reducion of chloroauric acid tetrahydrate. Au NPs were characterized and measured by using transmission electron microscope (TEM), UV-vis-NIR absorption spectroscopy, and surface Raman scattering. The results of experiment indicated that the size of Au NPs was related to the type of reducing agent and molar ratio of reducing agent and chloroauric acid. The weaker the reducing capacity of the reducing agent or the lower the molar ratio, the bigger the size of Au NPs is. The max wavelength of absorption peak for the citrate-capped Au NPs is red-shifted with the increase of particle diameter. Raman scattering observed from Au NPs of various sizes is found to be NP size-dependent. It is clear that the bigger Au NPs are more apparent in the Raman scattering determination. Size-tunable Au NPs should be crucial for biosensors, particularly as Raman-tag particles.

Preparation and Characterization of Fe3O4@Au Nanoparticles Used as Precursor of Ferrofluids

2010 ◽  
Vol 177 ◽  
pp. 415-417 ◽  
Author(s):  
De Cai Li ◽  
Zhi Li Zhang ◽  
Shao Lan Zhang
Keyword(s):  
Photoelectron Spectrum ◽  
Sodium Citrate ◽  
Au Nanoparticles ◽  
Ammonium Hydroxide ◽  
Reducing Agent ◽  
Chloroauric Acid ◽  
Fe3o4 Magnetic Nanoparticles ◽  
X Ray ◽  
Co Precipitation

The Fe3O4 magnetic nanoparticles were prepared through co-precipitation of Fe3+ and Fe2+ with ammonium hydroxide. The initially obtained Fe3O4 nanoparticles were then coated by gold in solution of chloroauric acid through connecting of 3-aminopropyropyl thriethoxysilane (3-APTES) and the obtained Fe3O4@Au nanoparticles were further characterized by X-ray photoelectron spectrum (XPS). During the process, the influences of chloroauric acid, reducing agent, coupling agent and nanoparticles of Fe3O4 were studied. The results showed that core-shell structure Fe3O4@Au particles have diameters of about 20nm in size synthesized from sodium citrate as reducing agent with 10.08 emu/g of saturation magnetization.

A Simple and Green Method for Synthesis of Ag and Au Nanoparticles using Biopolymers and Sugars as Reducing Agent

2012 ◽  
Vol 1386 ◽  
Author(s):  
Germán Ayala ◽  
Luci Cristina de Oliveira Vercik ◽  
Thiago Antônio Villa Menezes ◽  
Andrés Vercik
Keyword(s):  
Silver Nitrate ◽  
Au Nanoparticles ◽  
Low Ph ◽  
Repulsive Force ◽  
Reducing Agent ◽  
Absorption Peak ◽  
Chloroauric Acid ◽  
Gold Salt ◽  
Colloid Stability ◽  
Green Method

ABSTRACTIn this work we study the effect of different reducing agent (chitosan, starch and sugars) on to synthesis of silver (AgNPs) and gold (AuNPs) nanoparticles by reduction of silver nitrate (AgNO3) and chloroauric acid (HAuCl4), respectively. The plasmon absorption peak between 419 - 434 nm, measured using a UV-Vis spectrophotometer indicates the existence of AgNPs, this reaction was favored by the increase of temperature with optimal results at 90°C. Synthesis of AuNPs was only obtained using chitosan as reducing agent, the use of solutions of starch and sugars allows the reduction of the gold salt present in the chloroauric acid, however the low pH of the solutions creates thermodynamic instabilities for the AuNP synthesis, due to low repulsive force for colloid stability.

scholarly journals Integration of Ag/AgCl and Au nanoparticles into isostructural porous coordination polymers of Ni(ii), Co(ii) and Mn(ii): magnetic studies

RSC Advances ◽  
2017 ◽  
Vol 7 (7) ◽  
pp. 3870-3878 ◽  
Author(s):  
Rashmi A. Agarwal ◽  
Neeraj K. Gupta
Keyword(s):  
Coordination Polymers ◽  
Room Temperature ◽  
Au Nanoparticles ◽  
Reducing Agent ◽  
Porous Coordination Polymers ◽  
Magnetic Studies

Ag/AgCl and Au NP formation within non-activated isostructural porous coordination polymers at room temperature is reported without the use of reducing agent and deterioration of host frameworks.

In situ green synthesis of Au nanoparticles onto polydopamine-functionalized graphene for catalytic reduction of nitrophenol

RSC Advances ◽  
2014 ◽  
Vol 4 (110) ◽  
pp. 64816-64824 ◽  
Author(s):  
Jing Luo ◽  
Nan Zhang ◽  
Ren Liu ◽  
Xiaoya Liu
Keyword(s):  
Catalytic Activity ◽  
Green Synthesis ◽  
Au Nanoparticles ◽  
Catalytic Reduction ◽  
Reducing Agent ◽  
Functionalized Graphene ◽  
Au Nps ◽  
Surface Modifier ◽  
Green Route

A simple and green route was demonstrated to prepare graphene/Au NPs nanocomposite using polydopamine as surface modifier, reducing agent and stabilizer simultaneously, which exhibits remarkable catalytic activity for the reduction of 4-nitrophenol.

Carbon Monoxide Related Reductions

INEOS OPEN ◽  
2020 ◽  
Vol 3 ◽  
Author(s):  
O. I. Afanasyev ◽  
◽  
D. Chusov ◽  
Keyword(s):  
Organic Chemistry ◽  
Carbon Monoxide ◽  
Reducing Agent ◽  
Current Development ◽  
Efficient Route ◽  
Development Prospects

Carbon monoxide is a unique reducing agent that is only gaining popularity in organic chemistry. This review highlights the main approaches to the application of CO as a reducing agent, summarizes and critically analyzes the key trends in this field, and describes the current development prospects. Potentially the most selective and efficient route for the realization of these processes is demonstrated.

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