Preparation method and application of a molybdenum and nitrogen doped lignocellulose composite nano-adsorption material

A nano-adsorption material and lignocellulose technology, which is applied in chemical instruments and methods, adsorption water/sewage treatment, and other chemical processes, can solve the problems of high operating costs, short service life, and need for regeneration, and achieve low cost, Anti-aging, repeated use rate, and stable performance

Active Publication Date: 2021-05-25
YANGZHOU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

There are many kinds of adsorbents, and the commonly used one is activated carbon, which can adsorb a variety of heavy metal ions at the same time, and has a large adsorption capacity, but has a short service life, requires regeneration, and high operating costs

Method used

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  • Preparation method and application of a molybdenum and nitrogen doped lignocellulose composite nano-adsorption material
  • Preparation method and application of a molybdenum and nitrogen doped lignocellulose composite nano-adsorption material
  • Preparation method and application of a molybdenum and nitrogen doped lignocellulose composite nano-adsorption material

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0056] The preparation and application of a kind of molybdenum, nitrogen-doped lignocellulose composite nano-adsorption material of the present invention, comprises the following steps successively:

[0057] Lignocellulose was calcined at 800°C for 2 hours in an ammonia atmosphere, the heating rate was 5°C / min, and then ground after natural cooling to obtain nitrogen-doped lignocellulose;

[0058] (1) Dissolve 0.5mmol of ammonium molybdate in 40mL of deionized water to form solution I;

[0059] (2) Dissolve 10mmol thioacetamide in 40mL deionized water to make solution II;

[0060] (3) Fully mix solution I and solution II to prepare solution III;

[0061] (4) Add 30 mg of nitrogen-doped lignocellulose into solution III, and stir evenly to obtain solution IV;

[0062] (5) Transfer 80mL of solution IV to a 100mL autoclave and react at 200°C for 20h;

[0063] (6) After the solution is cooled, centrifuge the reaction product of step (6), collect the precipitate, wash with deioni...

Embodiment 2

[0071] The preparation and application of a kind of molybdenum, nitrogen-doped lignocellulose composite nano-adsorption material of the present invention, comprises the following steps successively:

[0072] (1) Lignocellulose was calcined at 800°C for 2 hours in an ammonia atmosphere, the heating rate was 5°C / min, and then ground after natural cooling to obtain nitrogen-doped lignocellulose;

[0073] (2) Dissolve 0.5mmol of ammonium molybdate in 40mL of deionized water to make solution I;

[0074] (3) Dissolve 10mmol of thioacetamide in 40mL of deionized water to form solution II;

[0075] (4) Fully mix solution I and solution II to prepare solution III;

[0076] (5) Add 30 mg of nitrogen-doped lignocellulose into solution III, and stir evenly to obtain solution IV;

[0077] ⑹Transfer 80mL of solution IV to a 100mL autoclave, and react at 200°C for 20h;

[0078] (7) After the solution is cooled, centrifuge the reaction product of step (6), collect the precipitate, wash it ...

Embodiment 3

[0086] The preparation and application of a kind of molybdenum, nitrogen-doped lignocellulose composite nano-adsorption material of the present invention, comprises the following steps successively:

[0087] (1) Lignocellulose was calcined at 800°C for 2 hours in an ammonia atmosphere, the heating rate was 5°C / min, and then ground after natural cooling to obtain nitrogen-doped lignocellulose;

[0088] (2) Dissolve 0.5mmol of ammonium molybdate in 40mL of deionized water to make solution I;

[0089] (3) Dissolve 10mmol of thioacetamide in 40mL of deionized water to form solution II;

[0090] (4) Fully mix solution I and solution II to prepare solution III;

[0091] (5) Add 30 mg of nitrogen-doped lignocellulose into solution III, and stir evenly to obtain solution IV;

[0092] ⑹Transfer 80mL of solution IV to a 100mL autoclave, and react at 200°C for 20h;

[0093] (7) After the solution is cooled, centrifuge the reaction product of step (6), collect the precipitate, wash it ...

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Abstract

The invention relates to a preparation method and application of molybdenum and nitrogen-doped lignocellulose composite nano-adsorption materials, comprising the following steps: (1) Lignocellulose is calcined in an ammonia atmosphere, cooled naturally and then ground to obtain nitrogen-doped lignocellulose Cellulose; (2) Dissolve ammonium molybdate in deionized water to form solution I; (3) Dissolve thioacetamide in deionized water to form solution II; (4) Mix solution I and solution II thoroughly , prepared into solution III; (5) Nitrogen-doped lignocellulose was added to solution III, and stirred to obtain solution IV; (6) Solution IV was transferred to a high-pressure reactor for high-temperature reaction; (7) After the high-temperature reaction solution IV was cooled, The reaction product is centrifuged to obtain molybdenum and nitrogen doped lignocellulose composite nanometer adsorption material. According to the invention, the molybdenum and nitrogen doped lignocellulose composite has good adsorption effect on hexavalent chromium, and its adsorption performance remains basically unchanged after repeated tests, and has good stability.

Description

technical field [0001] The invention relates to a preparation method and application of a molybdenum-nitrogen-doped lignocellulose composite nano-adsorption material, and belongs to the technical field of preparation of molybdenum-nitrogen-doped lignocellulose composite nano-adsorption materials. Background technique [0002] There are many traditional treatment methods for chromium-containing wastewater. The commonly used treatment methods mainly include adsorption method, ion exchange method, chemical precipitation method, membrane separation method, etc. Among them, the adsorption method is recognized as the most effective because of its simple operation, low investment and good treatment effect. one of the effective methods. There are many kinds of adsorbents, and the commonly used one is activated carbon, which can adsorb multiple heavy metal ions at the same time, and has a large adsorption capacity, but has a short service life, requires regeneration, and has high ope...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J20/24B01J20/30C02F1/28C02F101/22
CPCB01J20/0218B01J20/24B01J2220/4825C02F1/286C02F2101/22
Inventor 谈晶张娅王宏归
Owner YANGZHOU UNIV
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