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A preparation method of zinc oxide with high efficiency photocatalysis activity under sun's rays

A photocatalytic activity, sunlight technology, applied in chemical instruments and methods, physical/chemical process catalysts, metal/metal oxide/metal hydroxide catalysts, etc., can solve the problems of harsh reaction conditions, difficult preparation, etc. The preparation method is simple, the operability is strong, and the equipment is simple.

Inactive Publication Date: 2008-04-09
XIAMEN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the above methods are all through the combination of various semiconductors, or through the doping of metals and non-metals to achieve catalysis under sunlight, the preparation is relatively difficult, and the reaction conditions are relatively harsh.

Method used

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  • A preparation method of zinc oxide with high efficiency photocatalysis activity under sun's rays
  • A preparation method of zinc oxide with high efficiency photocatalysis activity under sun's rays

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] 1) Weigh 0.15g of anhydrous zinc acetate, put it into a 42cm glass tube, insert the glass test tube vertically into the tube furnace, and put it on the thermocouple. Heat to 186°C for 15 minutes, then keep the temperature at 186°C for 60 minutes, lower the temperature to 30°C for 30 minutes, take out the tube. Wash the product 3-4 times with distilled water, and then dry it. The morphology and composition of the product are systematically studied by XRD, SEM and other modern nano-testing and analysis techniques. XRD characterization (as shown in Figure 3) shows pure wurtzite zinc oxide, and SEM characterization (as in Figure 4) shows that the typical shape of the product is a columnar structure with a length of about 200nm.

[0033] 2) Configuration of methyl orange solution: prepare 2mg / L, 4mg / L, 6mg / L, 8mg / L, and 10mg / L methyl orange solutions respectively, and use a spectrophotometer to make a standard curve of concentration and absorbance. As shown in Figure 1, it ...

Embodiment 2

[0039] 1) Weigh 0.15g of anhydrous zinc acetate, put it into a 42cm glass tube, insert the glass test tube vertically into the tube furnace, and put it on the thermocouple. Heat to 286°C for 15 minutes, then keep the temperature at 186°C for 60 minutes, lower the temperature to 30°C after 30 minutes, take out the tube. Wash the product 3-4 times with distilled water, and then dry it.

[0040] 2) Configuration of methyl orange solution: prepare 2mg / L, 4mg / L, 6mg / L, 8mg / L, and 10mg / L methyl orange solutions respectively, and use a spectrophotometer to make a standard curve of concentration and absorbance.

[0041] 3) Weigh 48 mg of the prepared zinc oxide into a water tank, and measure 30 mL of 10 mg / L methyl orange solution into a beaker, and sonicate on an ultrasonic device for 10 min under the condition of avoiding light.

[0042] 4) Place the sonicated sample in a well-lit place (July 3, 2007, 12:00-13:00) for catalysis, and take a sample every 5 minutes, about 4-5 times.

...

Embodiment 3

[0046] 1) Weigh 0.15g of anhydrous zinc acetate, put it into a 42cm glass tube, insert the glass test tube vertically into the tube furnace, and put it on the thermocouple. Heat to 186°C for 15 minutes, then keep the temperature at 186°C for 120 minutes, lower the temperature to 30°C for 30 minutes, take out the tube. Wash the product 3-4 times with distilled water, and then dry it.

[0047] The morphology and composition of the product were systematically studied by XRD and SEM. As in Example 1, it was columnar zinc oxide.

[0048] 2) Configuration of methyl orange solution: prepare 2mg / L, 4mg / L, 6mg / L, 8mg / L, and 10mg / L methyl orange solutions respectively, and use a spectrophotometer to make a standard curve of concentration and absorbance.

[0049] 3) Weigh 48 mg of the prepared zinc oxide into a water tank, and measure 30 mL of 10 mg / L methyl orange solution into a beaker, and sonicate on an ultrasonic device for 10 min under the condition of avoiding light.

[0050] 4) ...

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Abstract

The invention discloses a preparation method for zinc oxide with highly effective photocatalytic activity under sunlight, and relates to photocatalyst, in particular to the preparation method for the zinc oxide with the highly effective photocatalytic activity under the sunlight. The adopted preparation method for the nano-zinc oxide is simple, catalyzer can be repeatedly used, the required equipment is simple, and the photocatalytic efficiency is high. Anhydrous zinc acetate drops to the room temperature after being heated, and the obtained nano-zinc oxide is dried after being washed; the preparation of methyl orange solution is to prepare two kinds of methyl orange solution with different concentrations, and a concentration standard curve and an absorbance standard curve are made by utilizing a spectrophotometer; the ultrasonic sound treatment is performed to the nano-zinc oxide and the methyl orange solution with one concentration under the dark condition, so that the photocatalysis is performed to the mixed solution of the nano-zinc oxide and the methyl orange solution, a sample is taken to be centrifugated, the absorbance of the methyl orange solution is measured on the spectrophotometer, and the concentration of the methyl orange solution is figured out according to the standard curve.

Description

technical field [0001] The invention relates to a photocatalyst, in particular to a method for preparing zinc oxide with high-efficiency photocatalytic activity under sunlight. Background technique [0002] In recent years, with the rapid development of industry, the problem of environmental pollution has become increasingly serious. Especially in the printing and dyeing industry, a large amount of water-soluble azo dyes are discharged (the most representative one is methyl orange), which makes the ecological environment worsen day by day. The governments of various countries have listed environmental pollution control as a top priority, and have invested huge sums of money in research on environmental purification materials and environmental pollution control technologies. The market demand for building materials and daily-use materials with green environmental protection functions is increasing. The photocatalytic reaction can completely mineralize pollutants under the a...

Claims

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Application Information

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IPC IPC(8): B01J23/06C02F1/30
Inventor 韩锡光周樨谢兆雄黄荣彬谢素原郑兰荪
Owner XIAMEN UNIV
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