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Diatomite-surface cobalt doped nano pyrite composite material and preparation and application thereof

A composite material and diatomite technology, applied in the preparation/separation of ammonia, catalyst activation/preparation, ammonia compounds, etc., can solve the problem of low visible light absorption rate of catalysts, easy recombination of photogenerated electrons and holes, hindering industrial applications, etc. problem, to achieve the effect of easy control, slow composite speed and wide light response range

Pending Publication Date: 2021-10-15
CENT SOUTH UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the development and application of photocatalysts, the main problems are: low absorption rate of visible light of the catalyst, easy recombination of photogenerated electrons and holes, complex preparation and relatively high cost, etc. These problems hinder its large-scale industrial application.

Method used

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  • Diatomite-surface cobalt doped nano pyrite composite material and preparation and application thereof
  • Diatomite-surface cobalt doped nano pyrite composite material and preparation and application thereof
  • Diatomite-surface cobalt doped nano pyrite composite material and preparation and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0038] (1) Weigh FeSO 4 ·7H 2 O,Na 2 S 2 o 3 Each 13.9g, 7.9g, add 30ml of ethylene glycol, after ultrasonic (120w) stirring for 15 minutes, add 0.8g of sulfur powder, ultrasonic (120w) stirring for 30 minutes;

[0039](2) Transfer the solution in (1) to a reaction kettle, put it into a blast drying oven, and conduct a hydrothermal reaction at 180°C for 24 hours, with a heating rate of 8°C / min; after the reaction is completed, use dilute sulfuric acid, carbon disulfide, and Water, ethanol and distilled water were washed 3 times each, and the precipitate was collected by centrifugation after each washing; after the washing was completed, the collected precipitate was put into a vacuum drying oven and dried at 70°C for 10 h to obtain FeS 2 Nano powder;

[0040] (3) Cobalt sulfate is dissolved in 10ml ethylene glycol (solid-to-liquid ratio Co 2+ : Ethylene glycol=0.45%), by mass ratio Co 2+ :FeS 2 =5% FeS added in (2) 2 Nano powder, and by mass ratio diatomaceous earth: ...

Embodiment 2

[0044] (1) Weigh FeSO 4 ·7H 2 O,Na 2 S 2 o 3 Each 13.9g, 7.9g, add 30ml of ethylene glycol, after ultrasonic (120w) stirring for 15 minutes, add 0.8g of sulfur powder, ultrasonic (120w) stirring for 30 minutes;

[0045] (2) Transfer the solution in (1) to a reaction kettle, put it into a blast drying oven, and conduct a hydrothermal reaction at 180°C for 24 hours, with a heating rate of 8°C / min; after the reaction is completed, use dilute sulfuric acid, carbon disulfide, and Water, ethanol and distilled water were washed 3 times each, and the precipitate was collected by centrifugation after each washing; after the washing was completed, the collected precipitate was put into a vacuum drying oven and dried at 70°C for 10 h to obtain FeS 2 Nano powder;

[0046] (3) Cobalt sulfate is dissolved in 10ml ethylene glycol (solid-to-liquid ratio Co 2+ : Ethylene glycol=0.45%), by mass ratio Co 2+ :FeS 2 =5% FeS added in (2) 2 Nano powder, and by mass ratio diatomaceous earth:...

Embodiment 3

[0050] (1) Weigh FeSO 4 ·7H 2 O,Na 2 S 2 o 3 Each 13.9g, 7.9g, add 30ml of ethylene glycol, after ultrasonic (120w) stirring for 15 minutes, add 0.8g of sulfur powder, ultrasonic (120w) stirring for 30 minutes;

[0051] (2) Transfer the solution in (1) to a reaction kettle, put it into a blast drying oven, and conduct a hydrothermal reaction at 180°C for 24 hours, with a heating rate of 8°C / min; after the reaction is completed, use dilute sulfuric acid, carbon disulfide, and Water, ethanol and distilled water were washed 3 times each, and the precipitate was collected by centrifugation after each washing; after the washing was completed, the collected precipitate was put into a vacuum drying oven and dried at 70°C for 10 h to obtain FeS 2 Nano powder;

[0052] (3) Cobalt sulfate is dissolved in 10ml ethylene glycol (solid-to-liquid ratio Co 2+ : Ethylene glycol=0.45%), by mass ratio Co 2+ :FeS 2 =5% FeS added in (2) 2 Nano powder, and by mass ratio diatomaceous earth:...

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Abstract

The invention discloses a diatomite-surface cobalt doped nano pyrite composite material and preparation and application thereof. The preparation method comprises the following specific steps: dissolving cobaltous sulfate in an organic solvent which has the boiling point of 180-300 DEG C, can dissolve the cobaltous sulfate and does not participate in a reaction, adding FeS2 nano powder and diatomite, and mixing the materials to be uniform; and transferring the mixed solution into a reaction kettle, carrying out hydrothermal reaction, washing with dilute sulfuric acid and carbon disulfide respectively, then washing with absolute ethyl alcohol and distilled water in sequence, and drying to obtain the diatomite-surface cobalt doped nano pyrite composite material. The photocatalytic nitrogen reduction capability of the FeS2 nano material is effectively improved; and the invention provides a thought and a technical method for constructing the diatomite-surface cobalt doped nano pyrite composite material for the first time, and has high popularization and application values.

Description

technical field [0001] The invention belongs to the technical field of photocatalytic nitrogen reduction catalysts, and in particular relates to a diatomite-surface cobalt doped nanometer pyrite composite material for photocatalytic nitrogen reduction and its preparation and application. Background technique [0002] Ammonia (NH 3 ) has a high energy density and is an important clean energy carrier and green fuel. However, NH 3 The production of ammonia is relatively difficult. So far, the method of industrially synthesizing ammonia is mainly based on the Haber-Bosch process, using N 2 with H 2 Synthesis of NH by reaction at high temperature and pressure 3 , this method is energy-intensive (accounting for 1% of global annual supply) and carbon dioxide emission (accounting for 1.6% of global carbon dioxide production). Therefore, it is necessary to develop a method that can produce NH with low energy consumption under normal temperature and pressure. 3 method is of grea...

Claims

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Application Information

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IPC IPC(8): B01J27/043B01J37/10C01C1/04
CPCB01J27/043B01J37/10C01C1/0411B01J35/39B01J35/23Y02P20/52
Inventor 夏金兰郑兴福聂珍媛刘红昌张多瑞陈红瑞
Owner CENT SOUTH UNIV
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