Method for preparing iron oxyhydroxide nanosheet and its product

A technology of iron oxyhydroxide and nanosheets, which is applied in the direction of iron oxide/hydroxide, etc., can solve the problems of large size of nanosheets, failure to inhibit the growth of FeOOH crystals, and difficult removal of impurity ions, etc., to achieve large specific surface area, easy to control, growth inhibitory effect

Inactive Publication Date: 2016-11-09
ZHEJIANG UNIV
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  • Abstract
  • Description
  • Claims
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Problems solved by technology

Ferric nitrate nonahydrate was used as the iron source, potassium hydroxide was used to adjust the PH, and the hydrothermal method was used to synthesize, but potassium hydroxide could not inhibit the growth of FeOOH crystals, and the final nanosheets were larger in size; secondly, the introduction of potassium ions made it difficult for impurity ions removal, which has a great impact on the application of FeOOH

Method used

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  • Method for preparing iron oxyhydroxide nanosheet and its product
  • Method for preparing iron oxyhydroxide nanosheet and its product
  • Method for preparing iron oxyhydroxide nanosheet and its product

Examples

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Embodiment 1

[0028] 1) Weigh 10mmol of ferric nitrate nonahydrate, dissolve it in 35ml of deionized water, and stir to an orange clear solution;

[0029] 2) Weigh 20 mmol of tetramethylammonium hydroxide, add it into the solution prepared in step 1), and stir well to obtain a reddish-brown suspension.

[0030] 3) Add the suspension prepared in step 2) into the liner of the reaction kettle. Use deionized water to adjust its volume to account for 4 / 5 of the inner tank volume of the reactor to obtain a suspension of the reaction precursor. At this time, the molar ratio of Fe / TMAH is 1:2, Fe 3+ The molar concentration is 0.25mol / L.

[0031] 4) Seal the liner of the reaction kettle containing the reactant body in the reaction kettle, and heat it at 100° C. for 6 hours to carry out hydrothermal treatment. Then the reaction kettle was placed in the air and naturally cooled to room temperature, the reactant was taken out, filtered, washed with deionized water and ethanol in sequence, and dried ...

Embodiment 2

[0035] 1) Weigh 10mmol of ferric nitrate nonahydrate, dissolve it in 35ml of deionized water, and stir to an orange clear solution;

[0036] 2) Weigh 40mmol tetramethylammonium hydroxide, add it into the solution prepared in step 1), and stir fully to obtain a reddish-brown suspension;

[0037] 3) Add the suspension prepared in step 2) into the liner of the reaction kettle. Use deionized water to adjust its volume to account for 4 / 5 of the inner tank volume of the reactor to obtain a suspension of the reaction precursor. At this time, the molar ratio of Fe / TMAH is 1:4, Fe 3+ The molar concentration is 0.25mol / L;

[0038] 4) Seal the liner of the reaction kettle containing the reactant body in the reaction kettle, and heat it at 110° C. for 6 hours to carry out hydrothermal treatment. Then the reaction kettle was placed in the air and naturally cooled to room temperature, the reactant was taken out, filtered, washed with deionized water and ethanol in sequence, and dried at ...

Embodiment 3

[0040] 1) Weigh 10mmol of ferric nitrate nonahydrate, dissolve it in 35ml of deionized water, and stir to an orange clear solution;

[0041] 2) Weigh 60 mmol of tetramethylammonium hydroxide, add it to the solution prepared in step 1), and stir fully to obtain a reddish-brown suspension;

[0042] 3) Add the suspension prepared in step 2) into the liner of the reaction kettle. Use deionized water to adjust its volume to account for 4 / 5 of the inner tank volume of the reactor to obtain a suspension of the reaction precursor. At this time, the molar ratio of Fe / TMAH is 1:6, Fe 3+ The molar concentration is 0.25mol / L.

[0043]4) Seal the liner of the reaction kettle containing the reactant body in the reaction kettle, and heat it at 120° C. for 6 hours to carry out hydrothermal treatment. Then the reaction kettle was placed in the air to cool down to room temperature naturally, the reactant was taken out, filtered, washed with deionized water and ethanol in turn, and dried at 6...

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Abstract

The invention relates to a method for preparing iron oxyhydroxide nanosheet and its product. The method comprises the following steps: 1) mixing iron nitrate nonahydrate, tetramethylammonium hydroxide and deionized water to obtain a precursor solution; the concentration of the iron nitrate nonahydrate in the precursor solution is 0.25-0.3 mol/L, and the concentration of tetramethylammonium hydroxide is 0.25-1 mol/L; 2) performing a hydrothermal reaction on the precursor solution obtained in the step 1) at the temperature of 100-120 DEG C for 6-8 hours, filtering the material, cleaning the material, and drying the material to obtain the iron oxyhydroxide nanosheet. The size of the iron oxyhydroxide nanosheet is small, and the other metal impurity in the products can be avoided.

Description

technical field [0001] The invention relates to a preparation method of iron oxyhydroxide, in particular to a preparation method of iron oxyhydroxide nanosheets and a product thereof. Background technique [0002] At present, the problem of water pollution we are facing is becoming more and more serious. A large part of the pollution source is the industrial wastewater discharged by the papermaking and dyeing industries. These industrial wastewaters contain a large amount of carcinogenic organic substances, which will pollute rivers and soil, and eventually endanger human health. At present, our treatment method for these sewage is mainly through catalytic photodegradation to decompose the toxic organic substances in it. The catalyst in this photodegradation process plays an important role. The catalyst with excellent performance can decompose the toxic organic matter in industrial wastewater faster and more thoroughly. organic matter. Currently TiO 2 It is the most widely...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01G49/02
CPCC01G49/02C01P2002/72C01P2004/03C01P2004/04C01P2004/20
Inventor 徐刚孙小磊杨永荣沈鸽韩高荣
Owner ZHEJIANG UNIV
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