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Compound photocatalytic material and preparation method and application thereof

A technology of composite photocatalysis and carbon materials, applied in the field of photocatalysis materials, can solve problems such as unsuitable for large-scale industrial production, difficult to control material structure, environmental hazards of strong acid and strong alkali, etc., to promote transmission and transfer, low equipment requirements, Artisanal and easy-to-handle effects

Inactive Publication Date: 2017-03-22
SOUTH CHINA UNIV OF TECH +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

First of all, it is necessary to add strong acid and strong alkali to remove the hard template in the later stage of material preparation, and the use of a large amount of strong acid and strong alkali will inevitably cause serious harm to the environment, and it is not suitable for large-scale industrial production; at the same time, porous carbon materials prepared by the hard template method still exist Problems such as uneven pore size distribution and difficult control of material structure

Method used

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  • Compound photocatalytic material and preparation method and application thereof
  • Compound photocatalytic material and preparation method and application thereof
  • Compound photocatalytic material and preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] (1) Weigh 9mmol of zinc nitrate and 70mmol of dimethylimidazole and dissolve in 200mL of methanol solution, stir to form a homogeneous solution, then vigorously stir at room temperature for 1h, and the formed solid is centrifuged and washed with methanol, then dried in vacuum at 50°C One night, ZIF-8 white powder was obtained;

[0032] (2) the ZIF-8 powder that step (1) obtains is put into tube furnace, under N 2 In the atmosphere, the temperature was raised to 700 degrees at a rate of 5°C / min, and kept at this temperature for 2 hours, and then cooled down to room temperature naturally, and a mixture of metal / metal oxide and carbonaceous material was obtained;

[0033] (3) Add 30mL of 1mol / L hydrochloric acid solution to the 2.02g mixture obtained in step (2), stir at room temperature for 12h, rinse with water for 3 times, and dry naturally to obtain the C-ZIF-8 carbon material;

[0034] (4) Ultrasonically disperse 0.15g of the carbon material obtained in step (3) in 1...

Embodiment 2

[0036] (1) Weigh 9mmol of zinc nitrate and 60mmol of dimethylimidazole and dissolve in 200mL of N,N-dimethylformamide solution, stir to form a homogeneous solution, then vigorously stir at room temperature for 12h, and the formed solid is centrifuged and methanol After washing, vacuum-dry at 50°C overnight to obtain ZIF-8 white powder;

[0037] (2) the ZIF-8 powder that step (1) obtains is put into tube furnace, under N 2 In the atmosphere, the temperature was raised to 900 degrees at a rate of 5°C / min, and kept at this temperature for 4h, and then cooled down to room temperature naturally, and a mixture of metal / metal oxide and carbonaceous material was obtained;

[0038] (3) Add 30 mL of 1 mol / L hydrochloric acid solution to the 1.85 g mixture obtained in step (2), stir at room temperature for 24 h, then rinse with water for 3 times, and obtain C-ZIF-8 carbon material after drying;

[0039] (4) Ultrasonically disperse 0.1g of the carbon material obtained in step (3) in 100m...

Embodiment 3

[0041] (1) Weigh 10mmol of zinc nitrate and 80mmol of dimethylimidazole and dissolve them in 200mL of N,N-dimethylformamide solution, stir to form a homogeneous solution, then vigorously stir at room temperature for 24h, the formed solid is centrifuged and methanol After washing, vacuum-dry at 50°C overnight to obtain ZIF-8 white powder;

[0042] (2) the ZIF-8 powder that step (1) obtains is put into tube furnace, under N 2 In the atmosphere, the temperature was raised to 1100 degrees at a rate of 5°C / min, and kept at this temperature for 10h, and then naturally cooled down to room temperature, that is, a mixture of metal / metal oxide and carbonaceous material was obtained;

[0043](3) Add 30 mL of 1 mol / L hydrochloric acid solution to the 2.39 g mixture obtained in step (2), stir at room temperature for 8 hours, then rinse with water for 3 times, and obtain C-ZIF-8 carbon material after drying;

[0044] (4) Ultrasonically disperse 0.2g of the carbon material obtained in step ...

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Abstract

The invention belongs to the technical field of preparation of environmental materials, and discloses a compound photocatalytic material and a preparation method and application thereof. Zinc nitrate and dimethyl imidazole are dissolved in organic solvent and powerfully stirred at room temperature to form solids, and the solids are subjected to centrifuging, washing and vacuum drying to obtain ZIF-8 powder; the obtained ZIF-8 powder is carbonized and heated in nitrogen and cooled to room temperature, and then a mixture is obtained; an acid solution is added into the obtained mixture to remove metal / metallic oxide, and a carbon material is obtained through drying; the obtained carbon material is subjected to uniform ultrasonic dispersion in deionized water, then cadmium chloride and thiourea are added and completely dissolved, nitrogen is injected, ultrasonic reaction is carried out, after reaction liquid is cooled, centrifuging and washing are carried out, and finally the compound photocatalytic material is obtained through vacuum drying. The synthesis method is simple, the requirement for equipment is low, and the prepared compound photocatalytic material can effectively utilize visible light for efficiently degrading and removing methyl orange dye wastewater.

Description

technical field [0001] The invention relates to a photocatalytic material for degrading methyl orange dye wastewater, in particular to a photocatalytic composite material composed of CdS and a carbon material prepared by using a metal organic framework material (ZIF-8) as a template and a preparation method thereof. Background technique [0002] Dyes are widely used in printing and dyeing, paper making, paint, wood preservatives and other industries. High chroma dye wastewater seriously affects the water quality, and will have toxic effects on organisms and even "three causes" effects. Efficient degradation and removal of dye wastewater has important scientific and practical significance for solving water environmental safety issues. [0003] Semiconductor photocatalytic degradation technology is an advanced oxidation technology that uses natural light energy to convert it into chemical energy, so that harmful organic substances in the air or water can be rapidly degraded o...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J27/04C02F1/30C02F101/30
CPCC02F1/30B01J27/04C02F2101/308B01J35/39
Inventor 程建华杨草郑华生张鹏
Owner SOUTH CHINA UNIV OF TECH
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