Macro preparation method for carbon doped zinc oxide-based visible-light catalyst

A zinc oxide-based, visible light technology, applied in the field of material chemistry, can solve the problems of complicated process and unsuitable for large-scale production, and achieve the effect of simple preparation process, great industrial application prospect, and cheap source

Inactive Publication Date: 2014-11-19
EAST CHINA UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] Through analysis and comparison, it is found that the existing preparation technology of zinc oxide doped with carbon is relatively complicated and not suitable for large-scale production, and carbon doped zinc oxide-based visible light catalyst has great potential in the environmental field. Therefore, It is of practical significance to explore its macro-preparation technology

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] Weigh the raw materials according to the molar ratio of the small molecule organic compound glycine and zinc nitrate as 2:1, place them in a mortar, grind them thoroughly until the system becomes viscous and transparent, then transfer the transparent liquid to a crucible, and dry it at 200°C 6h until no water vapor is released. Finally, the obtained brown fluffy substance was calcined at 600° C. for 2 h, and then rapidly cooled to obtain a pale pink powder. The particle size of the product observed by a transmission electron microscope is about 65 nm, and the product has good dispersibility. Take 0.1 g of the carbon-doped zinc oxide-based visible light catalyst powder and add it to 30 mL 2×10 -5 Catalyzed in mol / L rhodamine B solution. The organic dye Rhodamine B can be completely degraded within 15 minutes at a room temperature of 30°C±3°C and under sunlight.

[0037]

Embodiment 2

[0039]Weigh the raw materials according to the molar ratio of oxalic acid and zinc nitrate, a small molecule organic compound, and put them in a mortar, grind them thoroughly until the system becomes viscous and transparent, then transfer the transparent liquid to a crucible, and dry it at 180°C 5h until no water vapor is released. Finally, the obtained brown fluffy substance was calcined at 600° C. for 2 h, and then rapidly cooled to obtain a pale pink powder. The particle size of the product observed by a transmission electron microscope is about 75 nm, and the product has good dispersibility. Take 0.1 g of the carbon-doped zinc oxide-based visible light catalyst powder and add it to 30 mL 2×10 -5 Catalyzed in mol / L rhodamine B solution. The organic dye rhodamine B can be completely degraded within 25 minutes at a room temperature of 30°C±3°C and sunlight irradiation.

[0040]

Embodiment 3

[0042] Weigh the raw materials according to the molar ratio of citric acid and zinc nitrate of the small molecular organic matter is 5:1, put them in a mortar, grind them thoroughly until the system becomes viscous and transparent, then transfer the transparent liquid to a crucible, and put it under the condition of 200°C Dry for 6h until no water vapor is released. Finally, the obtained brown fluffy substance was calcined at 800° C. for 2 h, and then rapidly cooled to obtain a pale pink powder. The particle size of the product observed by a transmission electron microscope is about 50 nm, and the product has good dispersibility. Take 0.1 g of the carbon-doped zinc oxide-based visible light catalyst powder and add it to 30 mL 2×10 -5 Catalyzed in mol / L rhodamine B solution. The organic dye Rhodamine B can be completely degraded within 40 minutes at a room temperature of 30°C±3°C and under sunlight.

[0043]

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Abstract

The invention belongs to the technical field of material chemistry, and particularly relates to a macro preparation method for a carbon doped zinc oxide-based visible-light catalyst. The method disclosed by the invention adopts a micro-molecular organic matter combustion-supporting method for macroscopically preparing the carbon commingled zinc oxide-based visible-light catalyst. The preparation principle of the catalyst is that the reaction heat of the combustion of the micro-molecular organic matter at a high temperature is used to realize effective sedimentation and doping of a carbon element in zinc oxide crystals; at the same time, a large number of gases are generated in reaction processes, products can be crushed effectively, so that small-sized carbon doped zinc oxide-based nano particles are obtained, and the macro preparation of the carbon doped zinc oxide-based visible-light catalyst is realized. Prepared nano-powder has the advantages that the dispersibility is good, the particle sizes are small, the sizes are uniform, the visible-light catalytic property is excellent, and the chemical stability is high; at the room temperature of 27 DEG C-33 DEG C and sunlight exposures, the visible-light catalyst can completely degrade an organic dyestuff rhodamine B in 15 minutes, so that the catalyst can be applied to the fields of controlling environmental pollutants and the like.

Description

technical field [0001] The invention belongs to the field of material chemistry, and in particular relates to a macro-preparation method of a carbon-doped zinc oxide-based visible light catalyst. Background technique [0002] Zinc oxide is a semiconductor optoelectronic material with a wide range of applications. It has a band gap of 3.37 eV at room temperature and an exciton binding energy as high as 60 meV. The modified zinc oxide will have special electrical, catalytic and bactericidal properties. For example, aluminum-doped zinc oxide is a replacement solid solution formed by zinc oxide and aluminum oxide. It not only has good ultraviolet absorption performance and high chemical stability, but also has the characteristics of light color, high visible light transmittance and good conductivity. It can be widely used in In the fields of antistatic coatings, rubber and plastics, it is possible to replace ITO (In 2 o 3 :Sn) material trends. Nanopowders for photocatalytic...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/06C02F1/30C02F101/30C02F103/30
CPCY02W10/37
Inventor 刘金库张小燕王建栋张华张琦
Owner EAST CHINA UNIV OF SCI & TECH
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