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Nanometer zinc oxide photocatalyst and preparation method and application thereof

A nano-zinc oxide and photocatalyst technology, applied in the direction of physical/chemical process catalysts, metal/metal oxide/metal hydroxide catalysts, chemical instruments and methods, etc., can solve the problem of high cost and achieve low cost and innovation Strong, fast catalytic effect

Inactive Publication Date: 2014-09-10
HENAN NORMAL UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The semiconductor material with better photocatalytic activity is TiO 2 , but its cost is high, so in recent years, ZnO as a photocatalyst to degrade organic matter has become a research hotspot.

Method used

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  • Nanometer zinc oxide photocatalyst and preparation method and application thereof
  • Nanometer zinc oxide photocatalyst and preparation method and application thereof
  • Nanometer zinc oxide photocatalyst and preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0016] Preparation of nano ZnO particles:

[0017] (1) Preparation of precursors

[0018] Dissolve 0.5065g (3mmol) terephthalic acid in 20mL N,N-dimethylformamide solvent, and slowly add this solution to 1.78g (6mmol) Zn(NO 3 ) 2 ·6H 2 O in 30mL of N,N-dimethylformamide solution, then add 0.85mL of triethylamine, stir for 40min, and filter with suction to obtain a white Zn(II) precursor complex.

[0019] (2) Preparation of nano ZnO particles

[0020] Take 0.2 g of the above-mentioned Zn(II) precursor complex and calcinate at 500° C. for 2 h under a nitrogen atmosphere to prepare nano-zinc oxide photocatalyst.

[0021] figure 1 The scanning electron microscope image of the ZnO nanoparticles prepared for this example is a small particle structure with an average particle size of about 80 nm. image 3 The powder X-ray diffraction spectrum of the ZnO nanoparticles prepared for this example, the diffraction peaks in the spectrum correspond to the diffraction data of ZnO.

Embodiment 2

[0023] Preparation of nano ZnO particles:

[0024] (1) Preparation of precursors

[0025] Dissolve 0.5065g (3mmol) terephthalic acid in 20mL N,N-dimethylformamide solvent, slowly add this solution to the solution containing 0.45g (1.5mmol) Zn(NO 3 ) 2 ·6H 2 O in 30mL of N,N-dimethylformamide solution, then add 0.85mL of triethylamine, stir for 60min, and filter with suction to obtain a white Zn(II) precursor complex.

[0026] (2) Preparation of nano ZnO particles

[0027] Take 0.2 g of the above-mentioned Zn(II) precursor complex and calcinate it at 800° C. for 1 h in an air atmosphere to prepare nano-zinc oxide photocatalyst.

[0028] figure 2 The scanning electron microscope image of the ZnO nanoparticles prepared for this example is a small particle structure with an average particle size of about 80 nm. Figure 4 The powder X-ray diffraction spectrum of the ZnO nanoparticles prepared for this example, the diffraction peaks in the spectrum correspond to the diffracti...

Embodiment 3

[0030] (1) Preparation of precursors

[0031] Dissolve 0.18g (3mmol) formic acid in 20mL N,N-dimethylformamide solvent, slowly add this solution to the solution containing 0.9g (3mmol) Zn(NO 3 ) 2 ·6H 2 O in 30mL of N,N-dimethylformamide solution, then add 0.85mL triethylamine, stir for 120min, and filter with suction to obtain a white Zn(II) precursor complex.

[0032] (2) Preparation of nano ZnO particles

[0033] Take 0.2 g of the above-mentioned Zn(II) precursor complex and calcinate at 400° C. for 1 h in an air atmosphere to prepare nano-zinc oxide photocatalyst.

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Abstract

The invention discloses a nanometer zinc oxide photocatalyst and a preparation method and an application thereof. According to the key point of the technical scheme, the nanometer zinc oxide photocatalyst is prepared by the following steps: reacting zinc salt with organic ligands in a N,N-dimethylformamide solvent at room temperature, so as to form a Zn(II) precursor and then performing calcination at the temperature of 400 to 800 DEG C, wherein the molar mass ratio of zinc salt (n) to organic ligands (n) is (0.5-2) to 1, the zinc salt is Zn(NO3)2.6H2O, and the organic ligands include at least one of 1,3,5-trimesic acid, terephthalic acid, isophthalic acid, phthalic acid, formic acid and 4,4',4''-s-triazine-1,3,5-three-para aminobenzoic acid. The invention further discloses the preparation method of the catalyst and the application of the catalyst to processing of organic waste water containing rhodamine B. The nanometer zinc oxide photocatalyst has the advantages of environmental friendliness, simple preparation process, strong innovativeness and practicability and the like.

Description

technical field [0001] The invention relates to the technical field of photocatalysis and water pollution treatment, in particular to a nanometer zinc oxide photocatalyst and its preparation method and application. Background technique [0002] With the rapid development of the global economy, the human demand for water resources continues to increase, and the problem of sewage treatment has become more important. my country's printing and dyeing wastewater discharges a large amount, contains a lot of refractory substances, and has complex organic components. It has the characteristics of high pollutant concentration, deep color, and refractory biodegradation. It is easy to cause many environmental pollution problems, of which organic dyes are the main components. The representative rhodamine B is a bright pink artificially synthesized cationic dye, which is mainly used in industries such as colored glass, special fireworks and firecrackers, and laser materials. It has stron...

Claims

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Application Information

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IPC IPC(8): B01J23/06C02F1/32C02F101/30C02F103/30
Inventor 杨小丽李鹏张晓庆杨林
Owner HENAN NORMAL UNIV
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