Novel formation of Au/Ag bimetallic nanoparticles from a mixture of monometallic nanoparticles and their application for the rapid detection of lead in onion samples

2020 ◽  
Vol 44 (35) ◽  
pp. 15010-15017
Author(s):  
Sushama Sahu ◽  
Srishti Sharma ◽  
Kallol K. Ghosh
Keyword(s):  
Rapid Detection ◽  
Bimetallic Nanoparticles ◽  
Colorimetric Detection ◽  
Gold Silver ◽  
Monometallic Nanoparticles

Characterization of gold, silver and gold/silver bimetallic nanoparticles for colorimetric detection of lead in onion samples.

AuCu, AgCu and AuAg Bimetallic Nanoparticles: Synthesis, Characterization and Water Remediation

MRS Advances ◽  
2016 ◽  
Vol 1 (36) ◽  
pp. 2525-2530
Author(s):  
Judith Tanori ◽  
Diana Vargas-Hernández ◽  
Elisa Martínez-Barbosa ◽  
Raúl Borja-Urby ◽  
Arturo García-Bórquez ◽  
...  
Keyword(s):  
Composite Material ◽  
Bimetallic Nanoparticles ◽  
Chemical Reduction ◽  
Water Remediation ◽  
Natural Systems ◽  
Self Assembling ◽  
Transmission Electron ◽  
Gold Silver ◽  
Vis Spectroscopy

ABSTRACTSelf-assembling systems of amphiphilic molecules display structures similar to those of biomineralization natural systems. This allows to somehow mimic nature to synthesize nanomaterials with low polidispersity and with diverse morphologies. In this work we describe the synthesis and characterization of gold-copper, silver-copper, and gold-silver bimetallic nanoparticles by chemical reduction in self-assembling systems of two surfactants. The nanoparticles were characterized by Transmission Electron Microscopy and UV-Vis spectroscopy. We have prepared a composite material using mesoporous silica as support of the AuAg bimetallic nanoparticles. The system was used in photocatalysis experiments for water remediation applications. Our results show that the AuAg/SBA15 composite material degrades methyl orange in water from 17 ppm to 4 ppm in 30 minutes.

scholarly journals Ligand-protected gold/silver superatoms: current status and emerging trends

2020 ◽  
Vol 11 (45) ◽  
pp. 12233-12248
Author(s):  
Haru Hirai ◽  
Shun Ito ◽  
Shinjiro Takano ◽  
Kiichirou Koyasu ◽  
Tatsuya Tsukuda
Keyword(s):  
Current Status ◽  
Synthesis And Characterization ◽  
Emerging Trends ◽  
Gold Silver

This perspective summarizes the current status and emerging trends in synthesis and characterization of ligand-protected gold/silver superatoms.

scholarly journals A broad range assay for rapid detection and etiologic characterization of bacterial meningitis: performance testing in samples from sub-Sahara

2012 ◽  
Vol 74 (1) ◽  
pp. 22-27 ◽  
Author(s):  
Helen Won ◽  
Samuel Yang ◽  
Charlotte Gaydos ◽  
Justin Hardick ◽  
Padmini Ramachandran ◽  
...  
Keyword(s):  
Bacterial Meningitis ◽  
Rapid Detection ◽  
Performance Testing

Synthesis of Bimetallic AuPt Nanoparticles in Aqueous Solution and Electrocatalytic Activity

2005 ◽  
Vol 900 ◽  
Author(s):  
Peter N. Njoki ◽  
Jin Luo ◽  
Aisley Jacob ◽  
Rizwan Munawar ◽  
Bilal Khan ◽  
...  
Keyword(s):  
Aqueous Solution ◽  
Electrocatalytic Activity ◽  
Bimetallic Nanoparticles ◽  
Rotating Disk ◽  
Reduction Reaction ◽  
Rotating Disk Electrode ◽  
Morphological Properties ◽  
Nanoparticle Catalysts ◽  
Bimetallic Nanoparticle

ABSTRACTThe ability to control composition and size in the synthesis of bimetallic nanoparticles is important for the exploitation of the bimetallic catalytic properties. This paper reports recent findings of an investigation of the synthesis of gold-platinum (AuPt) bimetallic nanoparticles in aqueous solution via reduction of AuCl4− and PtCl42− using a combination of reducing and capping agents. In addition to characterization of the morphological properties of the AuPt nanoparticles using TEM and XRD, the electrocatalytic activity of the carbon-supported AuPt nanoparticle catalysts was also examined for oxygen reduction reaction (ORR) using the rotating disk electrode (RDE) technique. The findings have implications to the design of bimetallic nanoparticle catalysts for fuel cell reactions.

Colorimetric detection of hypoxanthine in aquatic products based on the mimic enzyme of cobalt-doped carbon nitride

2021 ◽  
Author(s):  
昕 王 ◽  
Zheng-Zhong Lin ◽  
Chengyi Hong ◽  
Zhiyong Huang
Keyword(s):  
Rapid Detection ◽  
Carbon Nitride ◽  
Colorimetric Detection ◽  
Colorimetric Method ◽  
Aquatic Products ◽  
Freshness Indicator

As an important freshness indicator of aquatic products, the rapid detection of hypoxanthine (Hx) is still urgent and challenging. In the present study, a colorimetric method for the rapid detection...

Green synthesis, characterization of Radix Hedysari-mediated silver nanoparticles and its sensitive colorimetric detection for Pb2+ in Yellow River Medium

2022 ◽  
Author(s):  
Jiahui Ji ◽  
Huifang Wu ◽  
Donghan Wang ◽  
Dan Liu ◽  
Xinyue Chen ◽  
...  
Keyword(s):  
Silver Nanoparticles ◽  
Green Synthesis ◽  
Yellow River ◽  
Colorimetric Detection ◽  
Environment Friendly ◽  
Alcohol Extract

In this study, a safe, rapid, and environment-friendly green synthesis for silver nanoparticles using the alcohol extract of Radix Hedysari (RH-AgNPs) was developed, the alcohol extract of Radix Hedysari (RH)...

Preparation and Characterization of Bimetallic Nanoparticles Ptx-Pd1-x Supported on Silica

2006 ◽  
pp. 559-563
Author(s):  
N. Castillo ◽  
L.A. García ◽  
A. Vázquez Z. ◽  
L. Díaz Barriga ◽  
R. Pérez
Keyword(s):  
Bimetallic Nanoparticles

scholarly journals Bimetallic Nanoparticles as a Model System for an Industrial NiMo Catalyst

Materials ◽  
2019 ◽  
Vol 12 (22) ◽  
pp. 3727
Author(s):  
Sara Blomberg ◽  
Niclas Johansson ◽  
Esko Kokkonen ◽  
Jenny Rissler ◽  
Linnéa Kollberg ◽  
...  
Keyword(s):  
Bimetallic Nanoparticles ◽  
Model System ◽  
Native Oxide ◽  
Oxide Shell ◽  
Industrial System ◽  
Narrow Size Distribution ◽  
Nimo Catalysts ◽  
Further Development ◽  
Industrial Relevance

An in-depth understanding of the reaction mechanism is required for the further development of Mo-based catalysts for biobased feedstocks. However, fundamental studies of industrial catalysts are challenging, and simplified systems are often used without direct comparison to their industrial counterparts. Here, we report on size-selected bimetallic NiMo nanoparticles as a candidate for a model catalyst that is directly compared to the industrial system to evaluate their industrial relevance. Both the nanoparticles and industrial supported NiMo catalysts were characterized using surface- and bulk-sensitive techniques. We found that the active Ni and Mo metals in the industrial catalyst are well dispersed and well mixed on the support, and that the interaction between Ni and Mo promotes the reduction of the Mo oxide. We successfully produced 25 nm NiMo alloyed nanoparticles with a narrow size distribution. Characterization of the nanoparticles showed that they have a metallic core with a native oxide shell with a high potential for use as a model system for fundamental studies of hydrotreating catalysts for biobased feedstocks.

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