Prepn process of nanometer silver sol
A nano silver sol, silver nitrate technology, applied in the field of fine chemicals, can solve the problems of increasing the diameter of silver colloidal particles, enhancing Raman properties, electrical conductivity, unstable product quality, etc., and achieving high stability and uniform particle size distribution. Effect
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
Method used
Image
Examples
Embodiment 1
[0018] Dissolve 0.2 mmol of silver nitrate in 1 liter of deionized water, add 0.6 mmol of 2-phosphonic acid butane-1,2,4-tricarboxylic acid, stir well, and adjust the pH value to 8.8 with NaOH solution , to make liquid A; dissolve 1.2 mmol of sodium borohydride in 4 ml of deionized water to make liquid B; quickly drop liquid B into liquid A, and stir vigorously at 2000 rpm for 15 minutes to obtain nano Silver sol. figure 2 It is a transmission electron microscope photo and a silver particle size distribution diagram of the silver sol prepared in Example 1. The silver sol is a round nanoparticle with an average particle size of 3.6nm, a standard deviation of 0.8nm, and a uniform particle size distribution. image 3 It is the ultraviolet-visible spectrum of the obtained silver sol, wherein the absorption peak at 394nm is the surface plasmon vibration peak of the nano silver colloidal particles. The sol can be kept stable for more than 3 months at room temperature.
Embodiment 2
[0020] Dissolve 0.2 mmol of silver nitrate in 1 liter of deionized water, add 0.6 mmol of 2-phosphonic acid butane-1,2,4-tricarboxylic acid, stir well, and adjust the pH value to 6.5 with NaOH solution , to make liquid A; dissolve 1.2 mmol of sodium borohydride in 4 ml of deionized water to make liquid B; quickly drop liquid B into liquid A, and stir vigorously at a rate of 3000 rpm for 15 minutes to obtain Nano silver sol. Figure 4 It is the TEM photo and the silver particle size distribution diagram of the obtained silver sol. The silver sol is round nanoparticles with an average particle size of 5.9nm, a standard deviation of 1.5nm, and a uniform particle size distribution. The sol can be kept stable within 3 months at room temperature.
Embodiment 3
[0022] Dissolve 0.01 mole of silver nitrate in 1 liter of deionized water, add 0.02 mole of 2-phosphonic acid butane-1,2,4-tricarboxylic acid, stir evenly, adjust the pH value to 8.8 with NaOH solution, and prepare into liquid A; 0.1 mole of sodium borohydride was dissolved in 300 milliliters of deionized water to make liquid B; liquid B was quickly added dropwise to liquid A, and vigorously stirred at a rate of 2000 rpm for 1 hour to obtain a particle size of Nano silver sol with uniform particle size between 4 and 20 nanometers. The sol can be kept stable within 3 months at room temperature.
PUM
| Property | Measurement | Unit |
|---|---|---|
| particle diameter | aaaaa | aaaaa |
| particle size | aaaaa | aaaaa |
| particle size | aaaaa | aaaaa |
Abstract
Description
Claims
Application Information
Login to View More