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A kind of metal-doped boehmite and its preparation method and application

A metal doping and boehmite technology, applied in chemical instruments and methods, other chemical processes, water/sludge/sewage treatment, etc., can solve the problems of lengthy process, difficulty, and low adsorption group sites. Achieve the effects of simple synthesis process, lower synthesis cost, and easy recycling

Active Publication Date: 2020-07-17
CENT SOUTH UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Although a lot of current research focuses on continuously improving the adsorption capacity and the adsorption rate, due to the problems of too small specific surface area and too low adsorption group sites in the current fluoride ion adsorbents, Sankhakarmakara et al. obtained the largest theoretical The amount of fluorine adsorption material is aluminum fumarate metal organic framework, the theoretical capacity is up to 600mg / g
Therefore, the adsorption capacity is still difficult for the adsorption of high concentration above 1000ppm, and the adsorption speed needs to be improved.
At present, the solvothermal bimetallic doping method of direct controllable assembly of loads overcomes the shortcomings of the current main post-load synthesis method, which has a lengthy process, and obtains a 300m 2 Composite materials with large specific surface area, multiple hydroxyl binding sites, and the introduction of enhanced doping metal sites have good application prospects in the field of adsorption material synthesis

Method used

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  • A kind of metal-doped boehmite and its preparation method and application
  • A kind of metal-doped boehmite and its preparation method and application
  • A kind of metal-doped boehmite and its preparation method and application

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Effect test

Embodiment 1

[0041] Accurately weigh a certain number of moles of Al(NO 3 ) 3 9H 2 O and different proportions of lanthanum nitrate (as shown in the table below) were dissolved in 20mL deionized water and 20mL ethanol. After being completely dissolved, 0.5mmol sodium citrate was added, ultrasonically oscillated until completely dissolved, and then transferred to a hydrothermal reaction kettle. Placed at 220°C for 24h. After the reaction is complete, cool down to room temperature, take out the product and wash it several times with deionized water and absolute ethanol, and finally dry it in an electric heating constant temperature blast drying oven at 60°C for 12 hours to obtain hollow nanoparticles. The ratio of raw materials is to add the prepared La-1, La-2, La-3, La-4 materials, the concentration is 1g / L, the adsorption time is 30min, and the adsorption of fluoride ion wastewater (fluorine ion concentration is 100mg / L, pH 7), the obtained adsorption effects are 45.2mg / g, 50.1mg / g, 43...

Embodiment 2

[0044] According to the method of embodiment 1, Al(NO 3 ) 3 9H 2 O 1.6mmol, change the doping metal to 0.4mmol of cerium nitrate hexahydrate to obtain hollow nanoparticles, which is a cerium-doped boehmite material.

Embodiment 3

[0046] According to the method of embodiment 1, Al(NO 3 ) 3 9H 2O 1.6mmol, changing the doping metal to 0.4mmol of neodymium nitrate, spherical nanoparticles can be obtained, which is the neodymium-doped boehmite material.

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Abstract

The invention belongs to the technical field of material synthesis and particularly relates to metal-doped boehmite as well as a preparation method and an application thereof. According to the preparation method, double metal salt is taken as a raw material, sodium citrate is taken as a metal complexing agent, reaction is carried out at 180-220 DEG C for 12-48 hours by virtue of metal-doped ions in a certain proportion in a mixed solution containing water and absolute ethyl alcohol in a proportion of 1 to (0.5-2) so as to generate boehmite-doped materials with different shapes. Efficiently andrapidly defluorinated doped boehmite is obtained in a one-step mixed solvothermal double metal doping manner. The method has the advantages of simplicity, convenience, feasibility, short flow and thelike. A simple and feasible synthesis idea is provided for the exploration of efficient doping materials.

Description

Technical field: [0001] The invention belongs to the technical field of adsorption materials, and relates to a high-efficiency and fast defluorination-doped boehmite and a preparation method and application thereof. Background technique: [0002] In recent years, people's life and industrial production will produce fluorine-containing wastewater, such as excessive fluoride solution in toothpaste, and electrolytic zinc in nonferrous metallurgy is prone to enrichment of fluoride ion solution to produce fluoride ion solution wastewater with a high concentration of more than 1000ppm. Common methods for defluorination of wastewater at home and abroad include chemical precipitation, ion exchange, membrane filtration, adsorption, and electrocoagulation. For high-concentration fluorine-containing solutions, chemical precipitation and adsorption are generally the main methods. Because chemical precipitation consumes a large amount of calcium oxide, and the pH of the solution is great...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J20/12C02F1/28B01J20/30C02F101/14
CPCB01J20/0281B01J20/0288B01J20/0296B01J20/045B01J20/046B01J20/12C02F1/281C02F2101/14
Inventor 王海鹰黄磊杨志辉汪鹏柴立元杨卫春史美清唐崇俭刘恢李青竹廖骐
Owner CENT SOUTH UNIV