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Nano flower-shaped ZnO photocatalyst, preparation method and application thereof

A flower-shaped zinc oxide, photocatalyst technology, applied in metal/metal oxide/metal hydroxide catalysts, physical/chemical process catalysts, chemical instruments and methods, etc., achieves good crystalline properties, uniform synthesis morphology, and preparation operations. simple effect

Inactive Publication Date: 2019-08-16
TIANJIN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the combination of ultrasound and hydrothermal method for the synthesis of three-dimensional nanoflower-like zinc oxide (ZnO) photocatalyst has not yet been seen.

Method used

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  • Nano flower-shaped ZnO photocatalyst, preparation method and application thereof
  • Nano flower-shaped ZnO photocatalyst, preparation method and application thereof
  • Nano flower-shaped ZnO photocatalyst, preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0048] A preparation method of nano-flower-shaped zinc oxide photocatalyst, comprising the following steps:

[0049] 1) Prepare zinc nitrate with a concentration of 0.0089g / mL in 75mL of deionized water, and add 0.315g of hexamethylenetetramine (HMTA) after it is completely dissolved to obtain a mixed solution a;

[0050] 2) Prepare a NaOH solution with a concentration of 0.024g / mL in 37.5mL deionized water, then slowly add it to the mixed solution a obtained in step 1, and stir at 550rpm for 10min to obtain the mixed solution b;

[0051] 3) Transfer the mixed solution b obtained in step 2 to a hydrothermal reaction kettle and react at 100°C for 12 hours. After the reaction, cool the product down to room temperature, centrifuge, wash with deionized water three times, and dry at room temperature for 24 hours to obtain a nanoflower Zinc oxide photocatalyst (represented by ZnO-0 below), its scanning electron microscope picture is as figure 1 As shown, the XRD pattern is as Fig...

Embodiment 2

[0055] A zinc oxide nanoflower and a preparation method thereof, comprising the following steps:

[0056] 1) Prepare zinc nitrate with a concentration of 0.0089g / mL in 75mL of deionized water, and add 0.315g of hexamethylenetetramine (HMTA) after it is completely dissolved to obtain a mixed solution a;

[0057] 2) Prepare a NaOH solution with a concentration of 0.024g / mL in 37.5mL deionized water, then slowly add it to the mixed solution a obtained in step 1, and stir at 550rpm for 10min to obtain the mixed solution b;

[0058] 3) Put the mixed liquid b obtained in step 2 into an ultrasonic cleaner (power 250W) for ultrasonic treatment for 60 minutes, then transfer it to a hydrothermal reaction kettle and react at 100°C for 12 hours. After the reaction, cool the product to room temperature and centrifuge. Wash three times with deionized water, dry at room temperature for 24h to obtain the nano-flower-shaped zinc oxide photocatalyst (hereinafter represented by ZnO-250), and its...

Embodiment 3

[0062] A zinc oxide nanoflower and a preparation method thereof, comprising the following steps:

[0063] 1) Prepare zinc nitrate with a concentration of 0.0089g / mL in 75mL of deionized water, and add 0.315g of hexamethylenetetramine (HMTA) after it is completely dissolved to obtain a mixed solution a;

[0064] 2) Prepare a NaOH solution with a concentration of 0.024g / mL in 37.5mL deionized water, then slowly add it to the mixed solution a obtained in step 1, and stir at 550rpm for 10min to obtain the mixed solution b;

[0065] 3) Put the mixed liquid b obtained in step 2 into an ultrasonic cell disruptor (power 950W) for ultrasonic treatment for 60 minutes, then transfer to a hydrothermal reaction kettle and react at 100°C for 12 hours. After the reaction, cool the product to room temperature and centrifuge , washed three times with deionized water, and dried at room temperature for 24 hours to obtain a nano-flower-shaped zinc oxide photocatalyst (hereinafter represented by Z...

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Abstract

The invention discloses a nano flower-shaped ZnO photocatalyst, a preparation method and application thereof. The nano-flower-shaped ZnO photocatalyst is of a three-dimensional nano-flower structure formed by stacking nano-sheets in a staggered mode, wherein the appearance is uniform, the crystallization performance is good and sufficient high-activity crystal faces are exposed on the surface, sothat in a reaction process with the photocatalyst, aggregation of single nano-particles can be prevented, and the photodegradation efficiency of pollutants is further improved. The method is simple tooperate in the preparation process and low in cost, and has good reusability and stability. The ZnO photocatalyst can degrade organic pollutants under different illumination conditions, and has gooddegradation capability.

Description

technical field [0001] The invention belongs to the technical field of environmental catalysis, and relates to a photocatalyst, in particular to a nano flower-shaped zinc oxide photocatalyst and a preparation method and application thereof. Background technique [0002] Photocatalytic technology is a green technology with important application prospects in the fields of energy and the environment. It has been widely used in many fields such as environmental purification, self-cleaning materials, oil-water separation, gas-phase sensing, and renewable energy. As a catalyst, it can effectively use sunlight to catalyze and oxidize toxic pollutants, and has the advantages of high efficiency, low energy consumption, mild reaction conditions, wide application range, and can reduce secondary pollution. [0003] Zinc oxide (ZnO) material, as a typical II-VI semiconductor, has a good performance in the degradation of some toxic and harmful substances due to its wide band gap (3.37eV) ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/06B01J35/02C02F1/30C02F1/32C02F101/38
CPCB01J23/06C02F1/30C02F1/32C02F2101/40C02F2305/10B01J35/39B01J35/40
Inventor 齐崴黄仁亮屈彦宁苏荣欣
Owner TIANJIN UNIV
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