Preparation and application of nano zinc oxide photocatalyst

A technology of nano-zinc oxide and photocatalyst, applied in the field of chemistry, can solve the problems of long period of nano-zinc oxide, cumbersome post-treatment process, many components in solution system, etc. Good photocatalytic effect

Active Publication Date: 2014-05-28
FUYANG NORMAL UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, this method has a long cycle for preparing nano zinc oxide, uses various chemical reagents such as zinc nitrate hexahydrate and hexamethylenetetramine, the operation is complicated, and the solution system has many components, poor selectivity and cumbersome post-treatment process.

Method used

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  • Preparation and application of nano zinc oxide photocatalyst
  • Preparation and application of nano zinc oxide photocatalyst
  • Preparation and application of nano zinc oxide photocatalyst

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0062] Preparation of Nano ZnO Photocatalyst

[0063] Weigh 1.756g (8mmol) of zinc acetate dihydrate into a beaker, add 40mL of diethylene glycol, and add 80mL of water, then place the beaker in an ultrasonic instrument, adjust the ultrasonic frequency to 100KHz, and ultrasonicate for 2.0h to produce a white precipitate;

[0064] Transfer the obtained white precipitate to a centrifuge tube, use the ultrasonic sedimentation method to settle the white precipitate in the centrifuge tube, and centrifuge at 10000r / min with a centrifuge, wash with absolute alcohol once, wash with distilled water 4 times, and finally The white precipitate was placed in a vacuum drying oven and dried under vacuum at 80°C to obtain a nano-ZnO photocatalyst.

[0065] XRD characterization

[0066] Weigh 0.5g of the above nano-ZnO photocatalyst powder and use the method (1) to perform XRD characterization, and obtain the XRD spectrum of the nano-ZnO photocatalyst, as shown in figure 1 shown.

[0067] A...

Embodiment 2

[0074] Preparation of Nano ZnO Photocatalyst

[0075] Weigh 1.00g of zinc acetate dihydrate into a beaker, and completely dissolve it in 120mL of diethylene glycol, and add 240mL of water, then place the beaker in an ultrasonic instrument, adjust the ultrasonic frequency to 120KHz, ultrasonic 5.0h, in the system Dispersed with white precipitate;

[0076] Transfer the obtained white precipitate to a centrifuge tube, use the ultrasonic sedimentation method to settle the white precipitate in the centrifuge tube, and centrifuge at 12000r / min with a centrifuge, wash it twice with 95% alcohol, wash it five times with distilled water, and finally wash the white The precipitate was placed in a vacuum drying oven and dried under vacuum at 200° C. to obtain a nanometer ZnO photocatalyst.

[0077] XRD characterization

[0078] Weigh 0.5g of the above-mentioned nano-ZnO photocatalyst powder and perform XRD characterization by the method (1), and obtain the XRD spectrum of the nano-ZnO p...

Embodiment 3

[0082] Preparation of Nano ZnO Photocatalyst

[0083] Weigh 5.00g of zinc acetate dihydrate into a beaker, add 40.0mL of water, and completely dissolve it in 20.0mL of diethylene glycol, then place the beaker in an ultrasonic instrument, adjust the ultrasonic frequency to 130KHz, ultrasonic 1.0h, the system Dispersed with white precipitate;

[0084] Transfer the obtained white precipitate to a centrifuge tube, use the ultrasonic sedimentation method to settle the white precipitate in the centrifuge tube, and centrifuge with a centrifuge at 8000r / min, wash it twice with absolute alcohol, wash it five times with distilled water, and finally The white precipitate was placed in a vacuum oven and dried under vacuum at 40°C to obtain a nano-ZnO photocatalyst.

[0085] XRD characterization

[0086] Weigh 0.5g of the above-mentioned nano-ZnO photocatalyst powder and perform XRD characterization by the method (1), and obtain the XRD spectrum of the nano-ZnO photocatalyst, which is si...

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Abstract

The invention discloses a preparation method and an application of nano zinc oxide photocatalyst. The method takes zinc acetate dihydrate and diethylene glycol as raw materials and synthesizes the nano zinc oxide (ZnO) photocatalyst by hydrolysis in one step optionally under the presence of water. The method is short in synthetic route, mild in conditions and simple in operations. The prepared nano ZnO photocatalyst has good photocatalytic performance within the range of ultraviolet and visible wavelengths, and has good application prospects particularly in dye sewage treatment.

Description

technical field [0001] The invention relates to the field of chemistry, in particular to a photocatalyst for treating waste water pollution and a preparation method thereof. Background technique [0002] With the development and progress of photochemical technology, the problems of energy and environmental pollution have been widely concerned by people. The requirements for industrial pollution control technology are increasing, and there are more and more researches on photocatalytic technology in environmental control. The use of solar energy to photocatalyze the degradation of pollutants has been one of the hotspots of research. Under the irradiation of light, semiconductor materials can promote the synthesis of compounds or degrade compounds by converting light energy into chemical energy. This is the so-called photocatalytic technology. At present, the use of semiconductor materials for photocatalysis to eliminate environmental pollutants is regarded as the most poten...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/06C02F1/32C02F103/30
CPCY02W10/37
Inventor 崔玉民李慧泉苗慧
Owner FUYANG NORMAL UNIVERSITY
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