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Citric-acid-assisted Mn-dope yttrium molybdate selective-adsorption nano material and preparation method thereof

A nano-material and selective technology, applied in chemical instruments and methods, other chemical processes, alkali metal oxides/hydroxides, etc., can solve the problems of easy agglomeration, low crystallinity of products, and adsorption activity of selective adsorption materials It can achieve the effect of uniform morphology, improved adsorption performance, and enhanced selective adsorption capacity.

Active Publication Date: 2017-02-22
河北旭赛环保科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

But there are also some problems, such as component segregation will appear during the precipitation process; part of the precipitate will be washed off during the suction filtration process; the crystallinity of the obtained product is not high, and agglomeration is prone to occur during the heat treatment process, etc.
Therefore, the adsorption activity of selective adsorption materials prepared by precipitation method is not high.

Method used

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  • Citric-acid-assisted Mn-dope yttrium molybdate selective-adsorption nano material and preparation method thereof
  • Citric-acid-assisted Mn-dope yttrium molybdate selective-adsorption nano material and preparation method thereof
  • Citric-acid-assisted Mn-dope yttrium molybdate selective-adsorption nano material and preparation method thereof

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Effect test

Embodiment 1

[0038] A method for preparing a citric acid-assisted Mn-doped yttrium molybdate selective adsorption nanometer material, specifically comprising the following steps.

[0039] Take by weighing 1.96mmol yttrium nitrate, 0.04mmol manganese nitrate is dissolved in 30ml distilled water, stirs to obtain solution A; Take by weighing 0.57mmol ammonium molybdate ((NH 4 ) 6 Mo 7 o 24 4H 2 O, A.R.) was dissolved in 30ml ethanol, and stirred evenly to obtain solution B; slowly pour solution B into solution A, stir magnetically for 1 hour, and rotate at 800r / min, then put it in a constant temperature water bath at 60°C for 12 hours, and process it into Precursor gel; add 1 g of citric acid to the precursor gel, then put it in an oven and keep it warm at 160°C for 4 hours; finally, take out the dried material and put it in a corundum crucible, and put it in a muffle furnace at a low temperature of 350°C Pre-calcine for 2 hours, and then calcined at 550°C for 3 hours to obtain nano-powde...

Embodiment 2

[0041] A method for preparing a citric acid-assisted Mn-doped yttrium molybdate selective adsorption nanometer material, specifically comprising the following steps.

[0042] Take by weighing 1.92mmol yttrium acetate, 0.08mmol manganese acetate is dissolved in 40ml distilled water, stirs to obtain solution A; Take by weighing 0.55mmol ammonium molybdate ((NH 4 ) 6 Mo 7 o 24 4H 2 O, A.R.) was dissolved in 30ml of methanol, and stirred evenly to obtain solution B; slowly pour solution B into solution A, magnetically stirred for 1 hour, and the rotation speed was 800r / min, and then placed in a constant temperature water bath at 80°C, and treated for 8 hours , to obtain the precursor gel; add 1 g of citric acid to the precursor gel, then put it in an oven and keep it warm for 5 hours at 150 ° C; ℃ low temperature pre-calcination for 1 hour, and then calcined at 700 ℃ for 2 hours to obtain nano-powder with selective adsorption properties.

Embodiment 3

[0044] A method for preparing a citric acid-assisted Mn-doped yttrium molybdate selective adsorption nanometer material, specifically comprising the following steps.

[0045] Take by weighing 1.88mmol yttrium acetate, 0.12mmol manganese acetate is dissolved in 50ml distilled water, stirs to obtain solution A; Take by weighing 0.55mmol ammonium molybdate ((NH 4 ) 6 Mo 7 o 24 4H 2 O, A.R.) was dissolved in 30ml of methanol, stirred evenly to obtain solution B; slowly poured solution B into solution A, stirred magnetically for 1.5h, and the rotation speed was 600r / min, then put it in a constant temperature water bath at 80°C for 8h, and treated into a precursor gel; add 1.5g citric acid to the precursor gel, then put it in an oven and keep it warm at 200°C for 3h; finally take out the dried material and place it in a corundum crucible, and place it in a muffle furnace for 450 ℃ low-temperature pre-calcination for 1 hour, and then calcined at 600 ℃ for 2.3 hours to obtain nano...

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Abstract

The invention provides a citric-acid-assisted Mn-dope yttrium molybdate selective-adsorption nano material and a preparation method thereof, belonging to the technical field of adsorbing materials. The chemical molecular formula of the selective-adsorption material is MnxY[2-x]Mo4O[15-0.5x], wherein 0.02<=x<=0.2. The preparation process comprises the following steps: mixing soluble salts of yttrium and manganese with ammonium molybdate, heating in a water bath to prepare a precursor gel, adding citric acid, drying, and calcining. When the doping degree of manganese is 8%, the powder material has the best selective adsorption property. The material is prepared by a citric-acid-assisted chemical solution decomposition method. The technique has low facility requests; the operational process is simple and convenient to control. The prepared powder has the advantages of high purity, uniform particles and favorable properties, and is a novel selective-adsorption material which can be widely used.

Description

technical field [0001] The invention belongs to the technical field of selective adsorption nanometer materials, in particular to a citric acid-assisted Mn-doped yttrium molybdate selective adsorption nanometer material and a preparation method thereof. Background technique [0002] The increasingly serious environmental pollution has become a problem that human beings pay more and more attention to. With the improvement of people's awareness of environmental protection, selective adsorption materials have become a research hotspot in materials science and catalytic science in recent years. Among them, molybdate has attracted much attention because of its high specific surface energy and high activity of exposed surface. Molybdate is a good selective adsorption matrix, but there are still disadvantages such as weak selectivity and low adsorption efficiency, which greatly limit the wide application of this selective adsorption material. In order to improve the unfavorable f...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/06B01J20/28B01J20/30
CPCB01J20/06B01J20/28007
Inventor 刘宣文郭瑞郑贵元肖维城丁广超苏娜
Owner 河北旭赛环保科技有限公司
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