Preparation method of Mxene membrane adsorption material based on polyamidoxime and uranium extraction method

A polyamidoxime, membrane adsorption technology, applied in chemical instruments and methods, adsorbed water/sewage treatment, nuclear engineering and other directions, can solve the problems of reduced adsorption efficiency, shortage of uranium resources, and many preparation steps, etc., to improve adsorption efficiency. , Huge application prospects, simple operation effect

Active Publication Date: 2021-06-18
ZHEJIANG SCI-TECH UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] However, nuclear energy is now said to be facing the biggest problem: the shortage of uranium resources
[0009] None of the reported amidoximation modified adsorption materials has the function of increasing the concentration of uranyl ions in the adsorption range, that is, it can only rely on the adsorption performance of the material itself, which greatly reduces the adsorption capacity of these materials at low concentrations of uranyl ions. Adsorption Efficiency in Seawater
Moreover, these methods have many preparation steps, complex reactions, high energy consumption, and some raw materials are expensive, making it impossible to put them into practical applications.

Method used

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  • Preparation method of Mxene membrane adsorption material based on polyamidoxime and uranium extraction method
  • Preparation method of Mxene membrane adsorption material based on polyamidoxime and uranium extraction method
  • Preparation method of Mxene membrane adsorption material based on polyamidoxime and uranium extraction method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0041] Choose Ti 3 AlC 2 Raw materials required for the reaction. At a temperature of 10°C, 0.1g of Ti 3 AlC 2 Add it to 20mL of 0.1mol / L HF solution for pretreatment for 0.5 hours. During the pretreatment process, continuously add 0.1mol / L NaOH solution dropwise through the automatic titration system to maintain the pH at 7; at a temperature of 30°C, The preprocessed Ti 3 AlC 2 Added into 60mL, pH = 6, DMSO solution with a concentration of 1.4mol / L, and ultrasonicated for 0.1 hour at 80% ultrasonic power; after ultrasonication, Ti 3 AlC 2 Take it out and dry it to get the Mxene film; under the conditions of temperature 20°C and pH=6, soak the Mxene film in a PAO solution with a concentration of 5mol / L and a number average molecular weight of 110,000 for 6 hours; after the reaction, Under the condition of vacuum degree of 0.17 MPa, the amidoximation modified Mxene membrane (Mxene-PAO) was obtained by vacuum filtration.

[0042] Place the dried Mxene-PAO on top of the s...

Embodiment 2～9

[0044] Carbon black, carbon nanotubes, graphene, nano-gold, nano-aluminum, black titanium dioxide, titanium dioxide, and hollow bimetallic plasma mesoporous nanoshells were selected as raw materials, and other conditions were the same as in Example 1. The results show that with Ti 3 AlC 2 The adsorption performance of the Mxene-PAO membrane as the raw material is the best (see image 3 ).

[0045]

Embodiment 10～14

[0047] PAO concentration is respectively 0.1mol / L, 1mol / L, 2.5mol / L, 7.5mol / L, 10mol / L, other conditions are the same as example 1. The results show that the adsorption performance is the best when the PAO concentration is 7.5mol / L (see Figure 4 ).

[0048] test PAO concentration Uranium adsorption performance (mg / g) Example 10 0.1mol / L 549.76 Example 11 1mol / L 795.23 Example 12 2.5mol / L 1505.69 Example 13 7.5mol / L 2196.34 Example 14 10mol / L 2039.71

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Abstract

The invention discloses a preparation method of an Mxene membrane adsorption material based on polyamidoxime and a uranium extraction method. The method comprises the following steps: treating the raw materials with HF at a certain temperature and under certain conditions; soaking in a DMSO solution, and carrying out ultrasonic suction filtration to form an Mxene membrane; soaking the Mxene membrane in a polyamidoxime solution, carrying out vacuum suction filtration to remove the polyamidoxime solution after soaking is finished, washing with pure water, and then drying to obtain an amidoximation modified Mxene membrane; flatly placing the Mxene membrane on the surface of the upper portion of the sponge, placing the Mxene membrane and the sponge into a uranyl ion solution together under illumination, and enabling the upper portion of the sponge to contact with the Mxene membrane. The method is simple, raw materials are rich, reaction conditions are mild, energy consumption is low, and the prepared material is good in adsorption performance.

Description

technical field [0001] The invention relates to the fields of material preparation and uranium extraction from seawater, in particular to a preparation method of a polyamide oxime-based Mxene membrane adsorption material and a uranium extraction method. Background technique [0002] In today's society, the scale of nuclear power plants is very large. There are nearly 400 nuclear power plants. It is believed that the scale of nuclear power plants will continue to expand in the future. According to the report of the International Atomic Energy Association, the world's nuclear power plants account for 13% of the world's production capacity, and nuclear energy will become the most dependent form of energy for human beings in a few decades. [0003] However, nuclear energy is now said to be facing the biggest problem: the shortage of uranium resources. There are only 4.85 million tons of uranium resources on land, which have only been used by humans for less than a century; alth...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/26B01J20/28B01J20/30C02F1/28C02F1/14C02F1/04G21F9/12C22B60/02C22B11/00C02F103/08
CPCB01J20/262B01J20/20B01J20/205B01J20/06B01J20/02B01J20/0248B01J20/28033C02F1/285C02F1/281C02F1/14C02F1/04G21F9/12C22B60/0252C22B11/04B01J2220/4806B01J2220/4812B01J2220/46C02F2101/006C02F2103/08Y02A20/212Y02A20/124Y02A20/142
Inventor 吴铭榜叶昊刘士成马璐琳姚菊明
Owner ZHEJIANG SCI-TECH UNIV
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