CN106513700A - Nano-silver colloid carried by porous titanium dioxide and preparation and application of nano-silver colloid carried by porous titanium dioxide - Google Patents
Nano-silver colloid carried by porous titanium dioxide and preparation and application of nano-silver colloid carried by porous titanium dioxide Download PDFInfo
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- CN106513700A CN106513700A CN201610937145.3A CN201610937145A CN106513700A CN 106513700 A CN106513700 A CN 106513700A CN 201610937145 A CN201610937145 A CN 201610937145A CN 106513700 A CN106513700 A CN 106513700A
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- B—PERFORMING OPERATIONS; TRANSPORTING
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- B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
- B22F9/00—Making metallic powder or suspensions thereof
- B22F9/16—Making metallic powder or suspensions thereof using chemical processes
- B22F9/18—Making metallic powder or suspensions thereof using chemical processes with reduction of metal compounds
- B22F9/24—Making metallic powder or suspensions thereof using chemical processes with reduction of metal compounds starting from liquid metal compounds, e.g. solutions
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- B22F1/00—Metallic powder; Treatment of metallic powder, e.g. to facilitate working or to improve properties
- B22F1/05—Metallic powder characterised by the size or surface area of the particles
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- B82Y30/00—Nanotechnology for materials or surface science, e.g. nanocomposites
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- B82Y—SPECIFIC USES OR APPLICATIONS OF NANOSTRUCTURES; MEASUREMENT OR ANALYSIS OF NANOSTRUCTURES; MANUFACTURE OR TREATMENT OF NANOSTRUCTURES
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Abstract
The invention discloses nano-silver colloid carried by porous titanium dioxide and preparation and application of the nano-silver colloid carried by the porous titanium dioxide. A reducing agent is added to a silver nitrate solution for a reduction reaction, and a formed nano-silver deposit is cleaned with deionized water; then, the nano-silver deposit is dried in a drying box at the temperature of 50 DEG C, and porous titanium dioxide powder is mixed with water and a dispersing agent, so that a solution is formed; after nano-silver powder is added, ultrasonic stirring is conducted, so that the nano-silver colloid carried by the porous titanium dioxide is formed, and the nano-silver colloid carried by the porous titanium dioxide is placed in a container and put in cold storage to be on standby. Firstly, silver ions in the silver nitrate solution are reduced through the reducing agent, so that nanometer particles are obtained; secondly, the porous titanium dioxide power and the dispersing agent are dispersed in the deionized water; and thirdly, the nano-silver particles are added, ultrasonic stirring is conducted for mixing, and the nano-silver particles are fully and evenly mixed with the deionized water. The preparation method of the nano-silver colloid carried by the porous titanium dioxide is simple. Because titanium dioxide is stable inorganic matter and also a sterilizing material, the anti-microbial effect and the sterilizing effect of the nano-silver can be improved; and meanwhile, the nano-silver is adsorbed on the surfaces of the porous particles, and therefore dispersed and stable colloid is formed. The nano-silver colloid carried by the porous titanium dioxide can be applied to the anti-microbial field, the anti-mildew field, the anti-corrosion field and the like.
Description
Technical field
The present invention relates to a kind of poriferous titanium dioxide loading nano silvery colloidal sol and preparation and application, belong to inorganic chemistry neck
Domain.
Background technology
Nano silver powder refers to silver-colored simple substance of the particle diameter less than 100nm, and its performance is relevant with particle diameter and pattern, determines which should
For different field, such as it is catalyzed, surface-enhanced Raman etc..Wherein, the anti-microbial property of nanometer silver causes wide due to related to human body
General concern, studies more nano silver colloidal sol and is rapidly developed, and also achieves good experimental result, but high concentration
Nano silver colloidal sol unstable properties, therefore it is very inconvenient in practical application, transport to limit nano silver colloidal sol.
Herein using the method for poriferous titanium dioxide loading nano silvery, one is the chemical stability using titanium dioxide, two
Be poriferous titanium dioxide specific surface area it is big, increase adsorption area, three is the effect that titanium dioxide itself also has antibacterial.Therefore remove
Can effectively improve outside the dispersibility and stability of nano-silver colloid, antibacterial can also be promoted.
The content of the invention
The purpose of the present invention is to overcome the deficiencies in the prior art, there is provided a kind of stable performance, the inorganic carried of high concentration receive
Rice silver sol and preparation method.
Another object of the present invention be the poriferous titanium dioxide loading nano silvery colloidal sol antibacterial, anti-mildew, it is anti-it is rotten should
With.
The silver ion reduction in silver nitrate is obtained into nano-particle first with reducing agent, then by porous silica titanium valve
Body and dispersant disperse in deionized water, then nano-Ag particles addition ultrasonic agitation is mixed so as to fully mix.Tool
Body is as follows：
A kind of preparation method of poriferous titanium dioxide loading nano silvery colloidal sol, it is characterised in that reducing agent is added into silver nitrate
Reduction reaction is carried out in solution, the nanometer silver precipitate with deionized water of formation is cleaned, then in 50 DEG C of drying of baking oven, the two of porous
Titanium oxide powder is mixed with water and dispersant, forms solution, then after nanometer silver powder is added, ultrasonic agitation obtains porous
Titanium dichloride load nano silver colloidal sol, in being put into container, cold preservation is stand-by.
Described reducing agent is the hydrazine hydrate of 0.2～0.1mol/l, one or two mixing in ascorbic acid.
The concentration of silver nitrate be 0.2～2mol/l, silver nitrate：The mol ratio of reducing agent is 1：2～4.
Porous nano titanium dioxide deionized water is prepared into the aqueous solution that mass concentration is 0.1～0.5mol/l, is added
Dispersant, the 2～5% of dispersant dosage aqueous solution weight, stir at least 1 hour.
The dispersant is tween, Polyethylene Glycol, methylcellulose, one kind of Radix Acaciae senegalis or its combination.
By dispersed nano-silver particles in titanium dioxide aqueous solution, silver is 3～5 with the mol ratio of titanium dioxide：1, stirring
500～1000rmp of speed, mixing time 3h.
A kind of poriferous titanium dioxide loading nano silvery colloidal sol, it is characterised in that be prepared into according to any of the above-described methods described
Arrive.
A kind of poriferous titanium dioxide loading nano silvery colloidal sol is in antibacterial, anti-mildew, anti-rotten application.
Preparation method of the present invention is simple, due to poriferous titanium dioxide aqueous dispersion energy loading nano silvery particle, to nanometer silver
Colloid has dispersion and Stabilization, therefore can obtain the stable nano silver colloid of high dispersive using the inventive method.Due to
Titanium dioxide is stable inorganic thing while being also sterilization material, can improve the antibiotic and sterilizing effect of nanometer silver, while nanometer silver is inhaled
It is attached to porous particle surface and forms dispersion, stable sol, the poriferous titanium dioxide loading nano silvery colloidal sol of the present invention can be used to resist
The fields such as bacterium, anti-mildew, anti-corruption.
Description of the drawings
Fig. 1 is the SEM figures of poriferous titanium dioxide aqueous dispersion carrying nano silver in the embodiment of the present invention 1.
Specific embodiment
Embodiment 1：
Claim the deionized water of the silver nitrate addition 25ml of 0.85g, 0.506g hydrazine hydrates are dissolved in into 50ml deionized waters, by hydrazine hydrate
Solution pours silver nitrate solution into, and quick stirring obtains nanometer silver precipitation, as shown in Figure 1.Dry at 50 DEG C after cleaning.Weigh
The molecular sieve type titanium dioxide of 0.136g adds 17ml water, is subsequently adding the methylcellulose of 0.004g, stirs at least 1 hour,
Then argentum powder is added and continue in solution at 500 rpm stirring 3 hours, obtained poriferous titanium dioxide loading nano silvery colloidal sol, put
In entering container, cold preservation is stand-by.
Embodiment 2：
The deionized water that 1.7g silver nitrate adds 25ml is weighed, 1.518g hydrazine hydrates are dissolved in 50ml deionized waters,
Pour hydrazine hydrate solution into silver nitrate solution, quick stirring obtains nanometer silver precipitation.Dry at 50 DEG C after cleaning.Weigh
The molecular sieve type titanium dioxide of 0.2g adds 10ml water, is subsequently adding the methylcellulose of 0.0004g, stirs at least 1 hour, so
Afterwards argentum powder is added in solution and continues stirring 3 hours under 750rpm, obtained poriferous titanium dioxide loading nano silvery colloidal sol, be put into
In container, cold preservation is stand-by.
Embodiment 3：
The deionized water that 8.5g silver nitrate adds 25ml is weighed, 10.12g hydrazine hydrates are dissolved in 200ml deionized waters,
Pour hydrazine hydrate solution into silver nitrate solution, quick stirring obtains nanometer silver precipitation.Dry at 50 DEG C after cleaning.Weigh
The molecular sieve type titanium dioxide of 0.8g adds 20ml water, is subsequently adding the Radix Acaciae senegalis of 0.0004g, stirs at least 1 hour, so
Afterwards argentum powder is added in solution and continues stirring 3 hours under 1000rpm, obtained poriferous titanium dioxide loading nano silvery colloidal sol, put
In entering container, cold preservation is stand-by.
Embodiment 4：
The deionized water that 8.5g silver nitrate adds 25ml is weighed, 10.12g hydrazine hydrates are dissolved in 200ml deionized waters,
Pour hydrazine hydrate solution into silver nitrate solution, quick stirring obtains nanometer silver precipitation.Dry at 50 DEG C after cleaning.Weigh
The molecular sieve type titanium dioxide of 0.8g adds 20ml water, is subsequently adding the Polyethylene Glycol of 0.0004g, stirs at least 1 hour, then
Argentum powder is added in solution and continues stirring 3 hours under 1000rpm, obtained poriferous titanium dioxide loading nano silvery colloidal sol, be put into
In container, cold preservation is stand-by.
Embodiment 5：
The deionized water that 8.5g silver nitrate adds 25ml is weighed, 35.224g hydrazine hydrates are dissolved in 200ml deionized waters, by hydrazine hydrate
Solution pours silver nitrate solution into, and quick stirring obtains nanometer silver precipitation.Dry at 50 DEG C after cleaning.Weigh the molecular sieve type of 0.8g
Titanium dioxide adds 20ml water, is subsequently adding the tween of 0.0004g, stirs at least 1 hour, then by argentum powder add in solution
Continue stirring 3 hours under 1000rpm, obtain poriferous titanium dioxide loading nano silvery colloidal sol, cold preservation is stand-by in being put into container.
Claims (8)
1. a kind of preparation method of poriferous titanium dioxide loading nano silvery colloidal sol, it is characterised in that reducing agent is added into silver nitrate
Solution in carry out reduction reaction, the nanometer silver precipitate with deionized water cleaning of formation, then in 50 DEG C of drying of baking oven, porous
Titanium dioxide powder is mixed with water and dispersant, forms solution, then after nanometer silver powder is added, ultrasonic agitation is obtained many
Porous titanium dioxide loading nano silvery colloidal sol, in being put into container, cold preservation is stand-by.
2. the preparation method of a kind of poriferous titanium dioxide loading nano silvery colloidal sol according to claim 1, it is characterised in that：
Described reducing agent is the hydrazine hydrate of 0.2～0.1mol/l, one or two mixing in ascorbic acid.
3. the preparation method of a kind of poriferous titanium dioxide loading nano silvery colloidal sol according to claim 1, it is characterised in that：
The concentration of silver nitrate be 0.2～2mol/l, silver nitrate：The mol ratio of reducing agent is 1：2～4.
4. the preparation method of a kind of poriferous titanium dioxide loading nano silvery colloidal sol according to claim 1, it is characterised in that：
Porous nano titanium dioxide deionized water is prepared into the aqueous solution that mass concentration is 0.1～0.5mol/l, dispersant is added, point
The 2～5% of powder consumption aqueous solution weight, stir at least 1 hour.
5. the preparation method of a kind of poriferous titanium dioxide loading nano silvery colloidal sol according to claim 1, it is characterised in that：
The dispersant is tween, Polyethylene Glycol, methylcellulose, one kind of Radix Acaciae senegalis or its combination.
6. the preparation method of a kind of poriferous titanium dioxide loading nano silvery colloidal sol according to claim 1, it is characterised in that：
By dispersed nano-silver particles in titanium dioxide aqueous solution, silver is 3～5 with the mol ratio of titanium dioxide：1, mixing speed 500～
1000rmp, mixing time 3h.
7. a kind of poriferous titanium dioxide loading nano silvery colloidal sol, it is characterised in that according to the arbitrary methods described system of claim 1-6
It is standby to obtain.
8. according to claim 7 poriferous titanium dioxide loading nano silvery colloidal sol in antibacterial, anti-mildew, anti-rotten application.
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Cited By (7)
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|---|---|---|---|---|
| CN106987818A (en) * | 2017-05-03 | 2017-07-28 | 吉林师范大学 | A kind of cellular TiO2Ag nano-complexes and preparation method thereof |
| CN107098537A (en) * | 2017-04-25 | 2017-08-29 | 杭州之江市政建设有限公司 | Municipal wastewater handling process |
| CN107244826A (en) * | 2017-05-09 | 2017-10-13 | 青岛天地人和装饰建材有限公司 | Utility model antimildew and antibacterial diatom ooze wall material and its preparation and construction method |
| CN112121769A (en) * | 2020-08-18 | 2020-12-25 | 江苏大学 | Biomass-based composite material with double-layer structure and application of biomass-based composite material to tellurium separation in complex environment |
| CN113083353A (en) * | 2021-04-10 | 2021-07-09 | 福州大学 | Preparation method and application of liquid photocatalyst |
| CN114192770A (en) * | 2021-11-19 | 2022-03-18 | 苏州大学 | Silver colloid and preparation method thereof |
| WO2023115446A1 (en) * | 2021-12-23 | 2023-06-29 | 泰波亚太有限公司 | Cleaning agent, and preparation method therefor and use thereof |
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Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN113083353A (en) * | 2021-04-10 | 2021-07-09 | 福州大学 | Preparation method and application of liquid photocatalyst |
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| WO2023115446A1 (en) * | 2021-12-23 | 2023-06-29 | 泰波亚太有限公司 | Cleaning agent, and preparation method therefor and use thereof |
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Application publication date: 20170322 |