Effects of the Ratio of Surface Protective Agent on the Preparation of Nano-Silver

It has many advantages with liquid phase reduction method to prepare the nano-silver, such as experimental conditions are simple, low cost, energy-saving, etc.. At the same time, the nano silver powder prepared by this method has high surface activity, catalytic property and wide usage. In this paper, nano-silver powder was prepared by changing the amount of protective agents with chemical liquid phase reduction method. This paper focuses on the impact of the amount of protective agent on the nano-silver. In addition, we also analyzed the reaction temperature, PH value of solution, viscosity and electrical conductivity on the preparation of nano-silver. Finally, test results from the TEM shows that the nano-silver was prepared with smaller size, uniform size and good dispersion.

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Effects of Different Reducing Agents and Protective Agents on the Preparation of Nano-Silver Powder

Key Engineering Materials ◽

10.4028/www.scientific.net/kem.512-515.136 ◽

2012 ◽

Vol 512-515 ◽

pp. 136-140

Author(s):

Feng Rui Zhai ◽

Yi Ming Liu ◽

Zhong Zhou Yi ◽

Hong Wei Zhang ◽

Min Lu

Keyword(s):

Reduction Method ◽

Chemical Reduction ◽

Silver Powder ◽

High Surface ◽

Reducing Agents ◽

Reducing Agent ◽

Protective Agent ◽

Chemical Reduction Method ◽

Protective Agents ◽

Nano Silver

Solution chemical reduction method is a means which used reducing agent in aqueous or organic systems to deoxidize silver ions. Its essence is an integrated process of the electrochemistry, thermodynamics, kinetics and fluid dynamics and so on. The process determines the physical and chemical properties such as the size distribution of powder, purity and reunion situations, etc. Nano-silver powder has high surface activity and catalytic properties, and is widely used to a lot of fields. So it has very important realistic significance to study the preparation method. In this paper, nano-silver powder was prepared with industrial AgNO3 as raw materials, sodium borohydride or hydrazine hydrate as reducing agent, polyvinyl alcohol, SDBS or polyvinylpyrrolidone(PVP) as the surface protective agent by solution chemical reduction method. The influences of different reducing agents and protective agents on the preparation of nano-silver were analyzed. The results from the XRD diffraction analysis and TEM show that it can be obtained high purity flake nano-silver in the reaction temperature range of 50-60°C.

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The Preparation of High Concentration Silver Nanoplates with Liquid-Phase Reduction Method

Key Engineering Materials ◽

10.4028/www.scientific.net/kem.562-565.627 ◽

2013 ◽

Vol 562-565 ◽

pp. 627-631

Author(s):

Ji Lan Fu ◽

Li Xin Mo ◽

Ya Ling Li ◽

Wei Wei Li ◽

Wen Bo Li ◽

...

Keyword(s):

Silver Nanoparticles ◽

Liquid Phase ◽

Reduction Method ◽

Deionized Water ◽

Molar Ratio ◽

Plasmonic Nanostructures ◽

High Concentration ◽

Nano Silver ◽

Silver Nanoplates ◽

Phase Reduction

Silver nanoplates, also referred to as nanoprisms or nanodisks, are two-dimensional plasmonic nanostructures that have attracted intensive attention due to their strong shape-dependent optical properties and related applications. In order to obtain the silver nanoplates with high concentration, the liquid-phase reduction method was adopted. Silver nanoparticles colloid was obtained by reducing the high molar concentration of AgNO3 (up to 3.17 M) with the hydrazine hydrate (H4N2 • H2O) as reductant in the presence of polyethylene pyrrole (PVP) as the protectant. 0.5 M Sodium Citrate is introduced into the precursor aqueous which containing AgNO3 and PVP, the molar ratio of PVP to AgNO3 was tuned from 0.64 to 1.5. When molar is 1.5, the mainly particles are silver nanospheres, on the contrary, the nanospheres are transferred into nanoplates as the ratio decreased gradually, until the mainly product are nanoplates. The constituent of the silver nano-clusters was established by performing the Powder X-ray diffraction. The nano-silver dispersion with average diameter is about 113.2 nm were finally deserved. The size distribution of the silver nanoparticles is recorded by the Zeta potential analyzer. Scanning electron microscope (SEM) was used to characterize the morphology of the nano-silver particles. The silver content is about 3%. Nano-silver colloid is obtained and purified by centrifugation and wash with deionized water and ethanol. Then, water-based silver conductive ink is obtained by adding some amount deionized water and additives and adjusted parameters, which could be widely used in printed electronics.

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Preparation of Liquid-Phase Reduction Method-Based Pt/TiO2 Catalyst and Reaction Characteristics during HCHO Room-Temperature Oxidation

Industrial & Engineering Chemistry Research ◽

10.1021/acs.iecr.0c02059 ◽

2020 ◽

Vol 59 (35) ◽

pp. 15489-15496

Author(s):

Hanki Eom ◽

In-hyuck Hwang ◽

Dong Yoon Lee ◽

Sang Moon Lee ◽

Sung Su Kim

Keyword(s):

Liquid Phase ◽

Room Temperature ◽

Reduction Method ◽

Temperature Oxidation ◽

Tio2 Catalyst ◽

Phase Reduction ◽

Reaction Characteristics

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Gram-scale synthesis of ultra-fine Cu2O for highly efficient ozone decomposition

RSC Advances ◽

10.1039/c9ra09873a ◽

2020 ◽

Vol 10 (9) ◽

pp. 5212-5219 ◽

Cited By ~ 1

Author(s):

Shuyan Gong ◽

Anqi Wang ◽

Jilai Zhang ◽

Jian Guan ◽

Ning Han ◽

...

Keyword(s):

Liquid Phase ◽

Room Temperature ◽

Reduction Method ◽

Ozone Decomposition ◽

Highly Efficient ◽

Phase Reduction

Dozens of grams of ultra-fine Cu2O with efficient ozone decomposition was prepared by a facile liquid phase reduction method at room temperature.

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An Ni–P/C electro-catalyst with improved activity for the carbohydrazide oxidation reaction

RSC Advances ◽

10.1039/c6ra22925e ◽

2016 ◽

Vol 6 (94) ◽

pp. 91956-91959 ◽

Cited By ~ 6

Author(s):

Xinyue Cao ◽

Haining Wang ◽

Shanfu Lu ◽

Sian Chen ◽

Yan Xiang

Keyword(s):

Catalytic Activity ◽

Liquid Phase ◽

Oxidation Reaction ◽

Reduction Method ◽

Significant Enhancement ◽

Phase Reduction ◽

Electro Catalytic Activity

Ni–P/C NPs were prepared through a two-step liquid phase reduction method, which exhibited a significant enhancement for the electro-catalytic activity towards the carbohydrazide oxidation reaction compared with Ni/C NPs.

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The influence of different Ni contents on the radar absorbing properties of FeNi nano powders

RSC Advances ◽

10.1039/c5ra27179g ◽

2016 ◽

Vol 6 (20) ◽

pp. 16413-16418 ◽

Cited By ~ 16

Author(s):

Hui Zhao ◽

Zhenghou Zhu ◽

Chao Xiong ◽

Xialian Zheng ◽

Qianying Lin

Keyword(s):

Liquid Phase ◽

Reduction Method ◽

Phase Reduction ◽

Absorbing Property ◽

Better Than

Absorbing property of Fe20Ni80 nanopowder was better than that of other Fe100−xNix powder fabricated by liquid phase reduction method. Absorbing band could be effectively broadened and absorbing property improved through optimal structural designs.

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