A preparation method of calcium hydrogen phosphate nanofibers for efficient separation of uranium
A calcium hydrogen phosphate and nanofiber technology, applied in the field of nanofibers, can solve the problems of limited adsorption capacity and adsorption rate, unenvironmental protection, complex preparation process, etc., and achieve the effects of fast and efficient adsorption, low price and simple preparation process
Active Publication Date: 2022-03-11
UNIV OF ELECTRONICS SCI & TECH OF CHINA
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Problems solved by technology
Chemisorption is relatively very simple, efficient and common method, but the adsorption capacity and adsorption rate are limited
Most of the common adsorbents are amidoxime-based materials, and the preparation process is complicated and the whole process is not environmentally friendly.
Method used
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[0044] The present invention will be further elaborated and illustrated below in conjunction with the embodiments of the present invention.
[0045] Add 1g of F127 into 50ml of ethanol water (volume ratio 1:1), stir to form a transparent solution, add 2ml of TMB, and stir to form a microemulsion. 2mmol CaCl 2 with 0.5ml H 3 PO 4 respectively dissolved in 30ml of ethanol water (volume ratio 1:1). Add it into the microemulsion successively, stir and react for 0.5h, and dissolve 1ml of ammonia water in 30ml of ethanol water (volume ratio 1:1). It was successively added into the solution, stirred and reacted for 10 hours, the surfactant and trimethylbenzene were removed by centrifugal extraction and washing, and the powder was obtained after freeze-drying.
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Abstract
The invention discloses a preparation method for constructing nanofibrous calcium hydrogen phosphate, which belongs to the field of synthesis of nanometer functional materials. The present invention adopts the method of simple nanometer microemulsion to prepare calcium hydrogen phosphate. Different nanomorphologies can be obtained by using this method. The fibrous calcium hydrogen phosphate shows a better performance of adsorbing uranium in the extraction of uranium from seawater. Compared with existing materials such as amidoxime materials, the present invention has the advantages of relatively simple preparation method, mass production and large-scale popularization. It can be used not only as a cheap and efficient uranium adsorbent, but also as a good subsequent adsorption carrier.
Description
[0001] The invention belongs to the preparation of an adsorbent for extracting uranium from seawater, and specifically adopts a soft template self-assembly method to prepare nanofibers through coordination. It realizes the efficient adsorption of uranyl ions through the chelation of phosphate radicals. Background technique [0002] Nuclear energy is a green and non-polluting energy source. It is not only widely used in the cutting-edge nuclear weapons of various countries, but also is the source of most of the electricity for the general public. Especially in many developed countries, the proportion of nuclear power generation is very high. The key element of nuclear energy is uranium, which is widely sourced from the earth's crust, sea water, and nuclear waste. However, due to the limited reserves of uranium on land, which is only a few thousandths of the uranium content in seawater, and the serious pollution caused by nuclear waste discharge, it is very necessary to seek hi...
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IPC IPC(8): D01F9/08C22B60/02C22B3/24B01J20/04B01J20/28B82Y40/00
CPCD01F9/08B01J20/048B01J20/28023C22B60/0265C22B3/24B82Y40/00
Inventor 岳秦马东生
Owner UNIV OF ELECTRONICS SCI & TECH OF CHINA
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