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Preparation method of black porous zinc oxide photocatalyst

A technology of porous zinc oxide and photocatalyst, applied in the direction of physical/chemical process catalyst, metal/metal oxide/metal hydroxide catalyst, chemical instrument and method, etc., can solve the problem of no black porous ZnO nanomaterial preparation method application report issues such as low biological toxicity and environmental toxicity, strong absorption, and simple preparation process

Pending Publication Date: 2020-04-24
ZKICME SUZHOU MICROELECTRONICS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

After investigating the relevant literature reports and patents on ZnO photocatalytic materials at home and abroad, there is no report on the preparation method of black porous ZnO nanomaterials and its application in the field of photocatalysis.

Method used

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  • Preparation method of black porous zinc oxide photocatalyst
  • Preparation method of black porous zinc oxide photocatalyst
  • Preparation method of black porous zinc oxide photocatalyst

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] A kind of preparation method of black porous zinc oxide photocatalyst, comprises the steps:

[0032] S1. Dissolve 0.89g of cobalt nitrate in 30mL of methanol, 0.98g of 2-methylimidazole in 10mL of methanol, mix and stir for 10min, add it to the hydrothermal reaction kettle, and place it in an oven at 100°C for 12h. After washing with water and ethanol three times each, the ZIF-8 precursor was obtained after vacuum drying at 60°C;

[0033] S2. Put 0.1 g of the ZIF-8 precursor in a muffle furnace, heat it to 600°C at a heating rate of 10°C / min, stop heating after 3 hours of heat preservation, and when the temperature in the furnace drops to room temperature, white porous ZnO is obtained powder;

[0034] S3, after putting 0.1 gram of white porous ZnO powder into the corundum ark, place it in a high-temperature tube furnace, and 2 Under the condition of / Ar (10% / 90%) atmosphere, after annealing treatment at a temperature of 400° C. for 2 hours, the black porous zinc oxide...

Embodiment 2

[0036] A kind of preparation method of black porous zinc oxide photocatalyst, comprises the steps:

[0037] S1. Dissolve 1.78 grams of cobalt nitrate in 30 mL of methanol, 1.96 grams of 2-methylimidazole in 10 mL of methanol, and mix and stir for 15 minutes, then add it to a hydrothermal reaction kettle, and place it in an oven at 120 ° C for 12 hours. After washing with water and ethanol three times each, the ZIF-8 precursor was obtained after vacuum drying at 60°C;

[0038] S2. Put 0.1 g of the ZIF-8 precursor in a muffle furnace, heat it to 600°C at a heating rate of 8°C / min, stop heating after 4 hours of heat preservation, and obtain white porous ZnO when the temperature in the furnace drops to room temperature powder;

[0039] S3, after putting 0.1 gram of white porous ZnO powder into the corundum ark, place it in a high-temperature tube furnace, and 2 Under the condition of / Ar (20% / 80%) atmosphere, after annealing treatment at a temperature of 400° C. for 3 hours, the...

Embodiment 3

[0041] A kind of preparation method of black porous zinc oxide photocatalyst, comprises the steps:

[0042] S1. Dissolve 5.9 grams of cobalt nitrate in 100 mL of methanol, and 7.8 grams of 2-methylimidazole in 50 mL of methanol. After mixing and stirring for 15 minutes, add it to a hydrothermal reaction kettle and place it in an oven at 120°C for 10 hours. After washing with water and ethanol three times each, the ZIF-8 precursor was obtained after vacuum drying at 60°C;

[0043] S2. Put the ZIF-8 precursor in a muffle furnace, heat it to 620° C. at a heating rate of 5° C. / min, and keep it warm for 2-4 hours to obtain a white porous ZnO powder;

[0044] S3, after putting the white porous ZnO powder into the corundum ark, put it in a high-temperature tube furnace, 2 / Ar (25% / 75%), after annealing at a temperature of 350° C. for 2.5 hours, the temperature in the furnace was lowered to room temperature to prepare a black porous zinc oxide photocatalyst.

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Abstract

The invention discloses a preparation method of a black porous zinc oxide photocatalyst, wherein the preparation method comprises the following steps: respectively dissolving cobalt nitrate and 2-methylimidazole in an organic solvent, mixing, stirring, adding into a hydrothermal reaction kettle, putting into an oven, carrying out heat preservation treatment, washing, and drying to obtain a ZIF-8 precursor; putting the ZIF-8 precursor into a high-temperature furnace, and carrying out heat preservation to obtain white porous ZnO powder; and carrying out annealing treatment on the white porous ZnO powder under a reducing atmosphere condition to obtain the black porous zinc oxide photocatalyst. According to the preparation method, a metal organic framework compound is used as a precursor to prepare the black porous ZnO having high visible light response and used for photocatalytic pollutant degradation, toxic and harmful reagents are not involved in the preparation process, the raw material cost is low, and the requirements of industrial batch production can be met.

Description

technical field [0001] The invention relates to the technical field of photocatalyst preparation, in particular to a method for preparing a black porous zinc oxide photocatalyst. Background technique [0002] Since the 20th century, the rapid development of science and technology has brought comfort and convenience to people's lives, but it has also led to energy shortages and environmental degradation. From the "eight major hazards" that shocked the world in the last century to global warming, ozone layer destruction and biodiversity loss discovered in recent years, the potential impact of environmental pollution is far greater than this, which seriously threatens the continued reproduction and survival of human beings. Therefore, controlling pollution, protecting the environment and realizing sustainable development are the common aspirations of all mankind. Photocatalytic degradation of pollutants in water is a new type of water treatment technology, and it is a new type...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/80C02F1/30C02F1/32C02F101/30
CPCB01J23/80B01J23/002C02F1/30C02F1/32C02F2305/10C02F2101/30B01J35/39
Inventor 朱青陈晓露李磊磊杨丽
Owner ZKICME SUZHOU MICROELECTRONICS CO LTD
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