Nano particle supporting method
A nanoparticle and carrier technology, applied in the field of making carriers support nanoparticles
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
Method used
Image
Examples
Embodiment 1
[0031] According to the present invention, ceria sol as nanoparticles is supported on alumina particles as a carrier according to the following procedures and conditions.
[0032] (1) Preparation of ceria sol
[0033] First, add ammonia water to 0.5M cerium nitrate solution to make pH 6, obtain precipitate, and separate water.
[0034] Next, it was added to a 0.5M citric acid solution to disperse it, and ammonia water was added to make the pH 8 to obtain a uniform nanoparticle dispersion colloid.
[0035] The aggregated secondary particle size of the obtained ceria nanoparticles is 10-15 nm, and the primary particle size is about 5 nm.
[0036] (2) Adsorption to activated alumina
[0037] Make the titanium dioxide sol made through the above according to image 3 The flow chart shown in the sequential adsorption on activated alumina.
[0038] Here, Ce / Al=5 / 100 (atomic ratio).
[0039] First, the pH of 0.15 M ammonium nitrate aqueous solution was adjusted to 8. 1 kg of dry...
Embodiment 2
[0054] A ceria sol (colloid) was produced in the following procedure.
[0055] First, ammonia water was added to a 0.5M cerium nitrate solution to adjust the pH to 6 to obtain a precipitate and separate water.
[0056] Next, it was added to a 0.8M malic acid solution to disperse it, and ammonia water was added to make the pH 8 to obtain a uniform nanoparticle dispersion colloid.
[0057] Thereafter, stirring was carried out for 1 hour in the same manner as in Example 1 to allow the activated alumina to adsorb the ceria sol. Laser light scattering of the adsorbed liquid was measured, but scattering due to nanoparticles was not observed.
[0058] Thereafter, stirring was further continued for 1 hour. Filter and dry overnight at 120°C. Then, calcined at 800°C for 2h. From the weight after firing, it was confirmed that almost the entire amount of the ceria sol was supported.
[0059] It can be adsorbed on the alumina carrier at a certain pH value without affecting the ammoniu...
Embodiment 3
[0061] In this example, iron oxide nanoparticles were supported on an alumina carrier.
[0062] Iron oxide sol (colloid) was produced in the following procedure.
[0063] First, add ammonia water to the 0.5M ferrous nitrate solution to make the pH 8, obtain a precipitate, and separate the water.
[0064] Next, it was added to 0.5M citric acid to disperse it, and ammonia water was added to adjust the pH to 8 to obtain a uniform nanoparticle dispersion colloid.
[0065] The aggregated secondary particle size of the obtained iron oxide nanoparticles is 10-15 nm, and the primary particle size is about 5 nm.
[0066] Thereafter, the same operation as in Example 1 was carried out to adsorb the iron oxide nanoparticles on the activated alumina carrier. Laser light scattering of the adsorbed liquid was measured, but scattering due to nanoparticles was not observed.
[0067] According to the present invention, there is provided a method for supporting nanoparticles in a highly dispe...
PUM
| Property | Measurement | Unit |
|---|---|---|
| particle diameter | aaaaa | aaaaa |
| density | aaaaa | aaaaa |
| density | aaaaa | aaaaa |
Abstract
Description
Claims
Application Information
Login to View More