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

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.

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

2012 ◽  
Vol 624 ◽  
pp. 80-83
Author(s):  
Feng Rui Zhai ◽  
Yi Ming Liu ◽  
Jian Ping Yuan ◽  
Hong Wei Zhang ◽  
Zhong Zhou Yi
Keyword(s):  
Liquid Phase ◽  
Reduction Method ◽  
Ph Value ◽  
Silver Powder ◽  
High Surface ◽  
Solution Viscosity ◽  
Protective Agent ◽  
Nano Silver ◽  
Phase Reduction ◽  
The Impact

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.

Synthesis of Mono-Dispersed Fine Spherical Silver Powders by Chemical Reduction Method

2007 ◽  
Vol 539-543 ◽  
pp. 2782-2786 ◽  
Author(s):  
Jong Gwan Ahn ◽  
Dong Jin Kim ◽  
Jae Ryeong Lee ◽  
H.S. Jung ◽  
Byoung Gyu Kim
Keyword(s):  
Reduction Method ◽  
Chemical Reduction ◽  
Silver Powder ◽  
Nitrate Solution ◽  
Particle Morphology ◽  
Silver Nitrate Solution ◽  
Phase Method ◽  
Metal Powders ◽  
Chemical Reduction Method ◽  
Liquid Phase Method

The synthesis of spherical silver powders by chemical reduction method was investigated. Conductive metal pastes to have good properties in adhesion, stability, and conductivity, it is very important to control the purity, size, and shape of metal particles. In the present study, proper methods to control the properties of micron sized metal powders for conductive pastes are investigated. Chemical reduction method in aqueous solution was adapted to produce silver powder. The effects of reaction time, concentration of reductant and additives, and stirring speed were investigated, in experimental. Fine spherical silver powder of 0.5 to 3 ㎛ were synthesized from silver nitrate solution with hydroquinone as a reducing additive by liquid phase method, and some variables and reaction mechanism in conjunction with the particle morphology and size were studied.

scholarly journals Synthesis of silver nanoparticles used chemical reduction method by glucose as reducing agent

2019 ◽  
Vol 1317 ◽  
pp. 012027
Author(s):  
Gusliani Eka Putri ◽  
Feni Rahayu Gusti ◽  
Annisa Novita Sary ◽  
Rahadian Zainul
Keyword(s):  
Silver Nanoparticles ◽  
Reduction Method ◽  
Chemical Reduction ◽  
Reducing Agent ◽  
Chemical Reduction Method

Effect of the mass ratio of micron and submicron silver powder in the front electrode paste on the electrical performance of crystalline silicon solar cells

RSC Advances ◽  
2016 ◽  
Vol 6 (34) ◽  
pp. 28289-28297 ◽  
Author(s):  
Hanying Wang ◽  
Yuping Tai ◽  
Ruixiao Li ◽  
Hui Wang ◽  
Jintao Bai
Keyword(s):  
Reduction Method ◽  
Crystalline Silicon ◽  
Chemical Reduction ◽  
Silver Powder ◽  
Electrical Performance ◽  
Silicon Solar Cells ◽  
Mass Ratio ◽  
Chemical Reduction Method ◽  
Crystalline Silicon Solar Cells ◽  
Front Electrode

In this paper, highly-dispersed spherical micron-sized (D50 = 2.94 μm) and submicron-sized (D50 = 0.59 μm) silver powders were prepared by a chemical reduction method.

scholarly journals Synthesis of Silver-Chitosan Nanocomposites Colloidal by Glucose as Reducing Agent

2015 ◽  
Vol 15 (1) ◽  
pp. 29-35 ◽  
Author(s):  
Endang Susilowati ◽  
Triyono Triyono ◽  
Sri Juari Santosa ◽  
Indriana Kartini
Keyword(s):  
Silver Nanoparticles ◽  
Reduction Method ◽  
Chemical Reduction ◽  
Reducing Agent ◽  
Absorption Peak ◽  
Synthetic Methods ◽  
Localized Surface Plasmon ◽  
Molar Ratio ◽  
Chemical Reduction Method ◽  
The Stability

Silver-chitosan nanocomposites colloidal was successfully performed by chemical reduction method at room temperature using glucose as reducing agent, sodium hydroxide (NaOH) as accelerator reagent, silver nitrate (AgNO3) as metal precursor and chitosan as stabilizing agent. Compared to other synthetic methods, this work is green and simple. The effect of the amount of NaOH, molar ratio of AgNO3 to glucose and AgNO3 concentration towards Localized Surface Plasmon Resonance (LSPR) absorption band of silver nanoparticles was investigated using UV-Vis spectrophotometer. The stability of the colloid was also studied for the first 16 weeks of storage at ambient temperature. The formation of silver nanoparticles was confirmed by the appearance of LSPR absorption peak at 402.4–414.5 nm. It is also shown that the absorption peak of LSPR were affected by NaOH amount, ratio molar AgNO3/glucose and concentration of AgNO3. The produced silver nanoparticles were spherical with dominant size range of 6 to 18 nm as shown by TEM images. All colloidals were stable without any aggregation for 16 weeks after preparation. The newly prepared silver-chitosan nanocomposites colloidal may have potential for antibacterial applications.

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