CN113101876A - Preparation method of porous ordered efficient photothermal conversion material - Google Patents
Preparation method of porous ordered efficient photothermal conversion material Download PDFInfo
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- CN113101876A CN113101876A CN202110271042.9A CN202110271042A CN113101876A CN 113101876 A CN113101876 A CN 113101876A CN 202110271042 A CN202110271042 A CN 202110271042A CN 113101876 A CN113101876 A CN 113101876A
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- B01J13/00—Colloid chemistry, e.g. the production of colloidal materials or their solutions, not otherwise provided for; Making microcapsules or microballoons
- B01J13/0091—Preparation of aerogels, e.g. xerogels
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- C09K5/00—Heat-transfer, heat-exchange or heat-storage materials, e.g. refrigerants; Materials for the production of heat or cold by chemical reactions other than by combustion
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- G21F—PROTECTION AGAINST X-RADIATION, GAMMA RADIATION, CORPUSCULAR RADIATION OR PARTICLE BOMBARDMENT; TREATING RADIOACTIVELY CONTAMINATED MATERIAL; DECONTAMINATION ARRANGEMENTS THEREFOR
- G21F9/00—Treating radioactively contaminated material; Decontamination arrangements therefor
- G21F9/04—Treating liquids
- G21F9/20—Disposal of liquid waste
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Abstract
The invention discloses a preparation method of a porous ordered high-efficiency photothermal conversion material, which comprises the following steps: firstly, adding copper sulfide and konjac glucomannan into deionized water, freezing the colloid after uniform stirring into a solid, drying for 72h, converting the solid into a sponge aerogel form, then, deacetylating the aerogel, soaking the deacetylated product in excessive deionized water for 24h, freezing into a solid, drying for 72h to obtain copper sulfide aerogel, and grafting amidoxime groups with different numbers by using acrylonitrile and hydroxylamine hydrochloride to obtain the required functionalized porous ordered copper sulfide aerogel. The invention takes copper sulfide and konjac glucomannan as raw materials, adopts an ice template method, controllably prepares porous ordered copper sulfide aerogel with broadband solar energy absorption, accurate thermal positioning, corrosion resistance and irradiation resistance, grafts amidoxime group on the porous ordered copper sulfide aerogel, obtains a target photothermal conversion material, and can be used for volume reduction treatment of radioactive wastewater.
Description
Technical Field
The invention relates to the field of radioactive wastewater treatment, in particular to a preparation method of a porous ordered high-efficiency photothermal conversion material.
Background
With the development of nuclear industry, more and more radioactive wastewater is inevitably generated, and the traditional process for treating the radioactive wastewater has the defects of secondary waste generation, non-ideal purification effect, overlarge energy consumption and the like. Therefore, the search for an efficient, cheap and environment-friendly technology to replace the traditional materials and process technology is a problem to be solved urgently in the nuclear energy industry.
Disclosure of Invention
Aiming at the problems, the invention provides a preparation method of a porous ordered high-efficiency photothermal conversion material, which can be used for volume reduction treatment of radioactive wastewater and enrichment and separation of uranium elements, and research results of the material provide important references for other heavy metal wastewater treatment and uranium extraction from seawater, and provide scientific basis and technical support for efficient, rapid and low-cost treatment of nuclide enrichment.
The technical scheme of the invention is as follows:
a preparation method of a porous ordered high-efficiency photothermal conversion material comprises the following steps:
s1, taking copper sulfide and konjac glucomannan, fully grinding, uniformly mixing, adding into deionized water, and continuously stirring for at least 24 hours;
s2, freezing the stirred colloid into a solid, transferring the solid into a freeze drying box for drying for 72 hours, and converting the solid into a sponge aerogel form;
s3, performing deacetylation treatment on the prepared aerogel;
s4, soaking the deacetylated product for 24 hours by using excessive deionized water, freezing the product into a solid, and transferring the solid into a freeze drying box for drying for 72 hours to obtain the porous ordered ultra-light copper sulfide aerogel;
s5, grafting amidoxime groups with different quantities on the obtained copper sulfide aerogel by using acrylonitrile and hydroxylamine hydrochloride to obtain the required functionalized porous ordered ultra-light copper sulfide aerogel.
In a further technical scheme, in the step S1, the weight ratio of the copper sulfide to the konjac glucomannan is as follows:
copper sulfide: konjac glucomannan 3-6: 4-7.
In a further technical scheme, in the step S1, the weight ratio of the copper sulfide to the konjac glucomannan is as follows:
copper sulfide: konjac glucomannan 4: 5.
in a further technical scheme, in the step S1, magnetic stirring is adopted, and the stirring speed is 1500 r/min.
In a further embodiment, in step S3, the deacetylation treatment method is as follows:
transferring the aerogel obtained in the step S2 to a polytetrafluoroethylene-lined reaction kettle, and adding a mixture of 1: 1 is 3.5 percent of potassium hydroxide solution and ethanol solution, and the aerogel is dried for 8 hours at 80 ℃ to complete the deacetylation treatment.
The invention has the beneficial effects that:
the invention takes copper sulfide and konjac glucomannan as raw materials, adopts an ice template method, controllably prepares porous ordered copper sulfide aerogel with broadband solar energy absorption, accurate thermal positioning, corrosion resistance and irradiation resistance, grafts amidoxime group on the porous ordered copper sulfide aerogel, obtains a target photothermal conversion material, and can be used for volume reduction treatment of radioactive wastewater.
Drawings
FIG. 1 is a diagram illustrating the formation of an aerogel according to example 1 of the present invention.
Detailed Description
The embodiments of the present invention will be further described with reference to the accompanying drawings.
Example 1:
a preparation method of a porous ordered high-efficiency photothermal conversion material comprises the following steps:
s1, adding 100ml of deionized water into a 200ml beaker, performing magnetic stirring at a stirring speed of 1500r/min, taking 1.2g of copper sulfide and 1.5g of konjac glucomannan, uniformly grinding in a mortar, adding into the beaker, and continuing to perform magnetic stirring for 24 hours (1500 r/min);
s2, pouring the stirred colloid into a plastic cup, then transferring the plastic cup to a refrigerator, freezing for 72h, freezing into a solid, and then drying the material by using a freeze drying oven for 72h to convert the solid into a sponge aerogel form, as shown in figure 1;
s3, transferring the aerogel obtained in the step S2 to a polytetrafluoroethylene lining reaction kettle, adding 100ml of 3.5% potassium hydroxide solution and 100ml of ethanol solution, and drying in a drying oven at 80 ℃ for 8 hours to complete the deacetylation treatment of the aerogel;
s4, soaking the deacetylated sample in excessive deionized water for 24 hours, transferring to a refrigerator for freezing for 72 hours, and transferring to a freeze drying oven for drying for 72 hours to obtain copper sulfide aerogel;
s5, grafting amidoxime groups with different quantities on the obtained copper sulfide aerogel by using acrylonitrile and hydroxylamine hydrochloride to obtain the required functionalized porous ordered ultra-light copper sulfide aerogel.
In this example, the weight ratio of copper sulfide to konjac glucomannan is:
copper sulfide: konjac glucomannan 4: 5.
in another embodiment, 1.2g of copper sulfide and 1.6g of konjac glucomannan are used as raw materials, and the weight ratio of the copper sulfide to the konjac glucomannan is as follows:
copper sulfide: konjac glucomannan 3: 4.
in another embodiment, 1.2g of copper sulfide and 1.4g of konjac glucomannan are used as raw materials, and the weight ratio of the copper sulfide to the konjac glucomannan is as follows:
copper sulfide: konjac glucomannan ═ 6: 7.
the porous ordered efficient photothermal conversion material prepared by the embodiment is used for treating uranium-containing emissive wastewater, and relevant performance indexes of the material are determined and compared with the performance indexes of the prior art as follows:
example 2:
a purification treatment method of uranium-containing radioactive wastewater comprises the following steps: the construction is used for the double-layer evaporation plant in 2D water route of splendid attire uranium-containing emissive waste water, adopts the porous orderly ultralight copper sulfide aerogel of functionalization that embodiment 1 made as the upper strata material, and lower floor's material adopts the hydroscopicity cellulose to wrap up one deck polystyrene foam as thermal insulation material in 2D water route double-layer evaporation plant's the outside, reach the purpose that reduces heat energy loss, improvement evaporation efficiency. Place the device in sufficient department of illumination, absorb solar energy by the porous orderly ultralight copper sulfide aerogel of functionalization to the high efficiency turns into heat energy, evaporates the uranium-bearing emission nature waste water in the device, carries out the selectivity separation to the uranium in the waste water simultaneously, accomplishes the volume reduction purification to uranium-bearing emission nature waste water.
The above-mentioned embodiments only express the specific embodiments of the present invention, and the description thereof is more specific and detailed, but not construed as limiting the scope of the present invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the inventive concept, which falls within the scope of the present invention.
Claims (5)
1. The preparation method of the porous ordered high-efficiency photothermal conversion material is characterized by comprising the following steps:
s1, taking copper sulfide and konjac glucomannan, fully grinding, uniformly mixing, adding into deionized water, and continuously stirring for at least 24 hours;
s2, freezing the stirred colloid into a solid, transferring the solid into a freeze drying box for drying for 72 hours, and converting the solid into a sponge aerogel form;
s3, performing deacetylation treatment on the prepared aerogel;
s4, soaking the deacetylated product for 24 hours by using excessive deionized water, freezing the product into a solid, and transferring the solid into a freeze drying box for drying for 72 hours to obtain the porous ordered ultra-light copper sulfide aerogel;
s5, grafting amidoxime groups with different quantities on the obtained copper sulfide aerogel by using acrylonitrile and hydroxylamine hydrochloride to obtain the required functionalized porous ordered ultra-light copper sulfide aerogel.
2. The method for preparing a porous ordered high-efficiency photothermal conversion material according to claim 1, wherein in step S1, the weight ratio of copper sulfide to konjac glucomannan is:
copper sulfide: konjac glucomannan 3-6: 4-7.
3. The method for preparing a porous ordered high-efficiency photothermal conversion material according to claim 2, wherein in step S1, the weight ratio of copper sulfide to konjac glucomannan is:
copper sulfide: konjac glucomannan 4: 5.
4. the method for preparing a porous ordered high efficiency photothermal conversion material according to claim 1, wherein in step S1, magnetic stirring is employed, and the stirring rate is 1500 r/min.
5. The method for preparing a porous ordered high efficiency photothermal conversion material according to claim 1, wherein in step S3, the deacetylation treatment method is as follows:
transferring the aerogel obtained in the step S2 to a polytetrafluoroethylene-lined reaction kettle, and adding a mixture of 1: 1 is 3.5 percent of potassium hydroxide solution and ethanol solution, and the aerogel is dried for 8 hours at 80 ℃ to complete the deacetylation treatment.
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| CN103223333A (en) * | 2013-04-15 | 2013-07-31 | 河海大学 | Di-amidoxime group containing modified silica gel adsorbent and preparation method thereof |
| CN105107466A (en) * | 2015-09-06 | 2015-12-02 | 中国人民解放军63653部队 | Method for recycling uranium in water by intercalated montmorillonite materials containing amidoxime groups |
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2021
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| CN103223333A (en) * | 2013-04-15 | 2013-07-31 | 河海大学 | Di-amidoxime group containing modified silica gel adsorbent and preparation method thereof |
| CN105107466A (en) * | 2015-09-06 | 2015-12-02 | 中国人民解放军63653部队 | Method for recycling uranium in water by intercalated montmorillonite materials containing amidoxime groups |
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Application publication date: 20210713 |