Nano-composite material and preparation method thereof

A nanocomposite material, NH2-MIL-125 technology, applied in the field of preparation of materials for removing uranyl ions, achieving the effect of good yield and removal effect, and simple synthesis method

Inactive Publication Date: 2018-12-18
南通寰宇博新化工环保科技有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In view of the above-mentioned defects of the prior art, the technical problem to be solved by this invention is to provide a g-C 3 N 4 / NH 2 -MIL-125(Ti) nanocomposite material and its preparation method realize the rapid adsorption of uranyl ions on the surface of the catalyst, and under simulated sunlight, the effective electron conduction and the separation of photogenerated carriers improve the photocatalysis of the material The reduction efficiency realizes U(VI) reduction and U(IV) reduction removal, so as to realize the synergistic mechanism of adsorption and photocatalysis to control the pollution of radioactive uranyl ions

Method used

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  • Nano-composite material and preparation method thereof

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preparation example Construction

[0048] Such as figure 1 As shown in the flow chart of a preferred embodiment of the present invention, to obtain final product g-C 3 N 4 / NH 2 -MIL-125(Ti) nanocomposite material, the intermediate NH needs to be prepared first 2 -MIL-125(Ti), thermally oxidized graphene-like carbon nitride H-g-C 3 N 4 , B-g-C 3 N 4 , where the intermediate NH 2 -The preparation method of MIL-125 (Ti), comprising the following steps:

[0049] Step 1. Measure 1-8mL of methanol and 10-30mL of N,N-dimethylformamide solution into the container dropwise, stir for 10-60mins, then absorb 0.5-5mL of tetrabutyl titanate and slowly add into the container dropwise , and continue to stir for 20-40mins until the mixed solution is completely dispersed evenly, then add 0.5-5g of aminoterephthalic acid into the mixed solution, and continue to stir for 20-40mins until the solution is evenly mixed;

[0050] Step 2. Transfer the homogeneous solution obtained in step 1 to the lining of the polytetrafluoro...

Embodiment 1

[0063] Example 1 prepares 1% g-C 3 N 4 / NH 2 -MIL-125(Ti) nanocomposite material

[0064] 1.1 Preparation of NH 2 -MIL-125(Ti)

[0065] Measure 2mL of methanol and 18mL of N,N-dimethylformamide solutions with a pipette and drop them into the beaker, stir for 30mins, then absorb 1.2mL of tetrabutyl titanate and slowly add them into the beaker drop by drop, and continue to stir for 30mins until The solution is completely dispersed evenly, then 1.1g of aminoterephthalic acid is added into the mixed solution, and the stirring is continued for 30mins until the solution is evenly dispersed.

[0066] Transfer the above homogeneously dispersed solution to the inner lining of a polytetrafluoroethylene reactor, conduct a solvothermal reaction at 150°C for 48 hours, take out the product after the reactor is cooled, and centrifuge with absolute ethanol and water at a speed of 8000r / mind respectively 6 times, then vacuum-dried at 60°C and taken out and ground into a uniform bright yello...

Embodiment 2

[0075] Embodiment 2 prepares 2.5% g-C 3 N 4 / NH 2 -MIL-125(Ti) nanocomposite material

[0076] First three steps are the same as 1.1~1.3 in embodiment 1

[0077] Step 2.4 Preparation of 5% g-C 3 N 4 / NH 2 -MIL-125(Ti) nanocomposite material

[0078] Take by weighing the NH obtained by 1.1 in 0.975g embodiment 1 2 -MIL-125 (Ti) and 0.025g B-g-C obtained in 1.3 of Example 1 3 N 4 Add it to a three-necked round bottom beaker, then add 20 mg of 1-ethyl-(2-dimethylaminopropyl) carbodiimide hydrochloride, 1-hydroxybenzotriazole and 300 μL of N, N-dipropylethyl amine, while feeding nitrogen into the three-necked round-bottom beaker while stirring, the stirring time is 48h, and then the product is filtered with DMF and a large amount of water, washed, and vacuum-dried to obtain 1% g-C 3 N 4 / NH 2 -MIL-125(Ti), referred to as 2.5CN.

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Abstract

The invention discloses a g-C3N4/NH2-MIL-125(Ti) nano-composite material and a preparation method thereof, and relates to the field of preparation of uranyl ion removal materials. The preparation method includes the following steps: preparing an intermediate NH2-MIL-125(Ti), preparing an intermediate H-g-C3N4, preparing an intermediate B-g-C3N4, and finally preparing the g-C3N4/NH2-MIL-125(Ti) nano-composite material. The B-g-C3N4 is used for the first time, and the B-g-C3N4 and an aminated NH2-MIL-125(Ti) material undergo amido bond formation to synthesizes the heterojunction photocatalytic composite material, and photo-induced electrons and holes are effectively separated, so the performance for catalytic reduction of U (VI) into U(IV) is improved; and when the mass proportion of the B-g-C3N4 is 1%, the composite material can effectively remove radioactive uranyl ions through the synergistic mechanism of adsorption and photocatalysis, so the U (VI) removal rate is improved.

Description

technical field [0001] The invention relates to the field of preparation of materials for removing uranyl ions, in particular to a g-C 3 N 4 / NH 2 -MIL-125(Ti) nanocomposite material and its preparation method. Background technique [0002] In the current era of rapid economic development, due to the depletion of traditional non-renewable resources such as ore and coal fuel, human beings will face serious energy depletion in the near future. The area and capacity of sea water on the earth account for more than 71% and 95% of the total global area and capacity respectively. In addition to a large amount of oil, there are also a large amount of uranyl ions in sea water. If it can be enriched, recovered and Utilize etc., this will solve the problem of energy depletion for us, find a new way of solving. With the continuous use of nuclear energy by human beings, the environmental pollution hazards brought by it have gradually become prominent, especially the problem of radioa...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/22B01J20/30C02F1/28B01J31/22
CPCB01J20/20B01J20/226B01J31/1691B01J31/2239B01J35/004B01J2531/46C02F1/283C02F1/285C02F2101/006
Inventor 邹建平江训恒黎翔秦元成
Owner 南通寰宇博新化工环保科技有限公司
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