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Preparation of phenolic resin photocatalyst and sterilization and disinfection method thereof

A technology of photocatalysts and phenolic resins, applied in chemical instruments and methods, physical/chemical process catalysts, organic compounds/hydrides/coordination complex catalysts, etc., can solve problems such as high cost, insufficient safety and reliability, and reach the price Low, good bactericidal performance, and simple synthesis process

Active Publication Date: 2020-05-22
HARBIN INST OF TECH SHENZHEN GRADUATE SCHOOL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] There are many ways to sterilize water, air or the surface of objects, but each has its own shortcomings, such as not being safe and reliable, high cost, etc.

Method used

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  • Preparation of phenolic resin photocatalyst and sterilization and disinfection method thereof
  • Preparation of phenolic resin photocatalyst and sterilization and disinfection method thereof
  • Preparation of phenolic resin photocatalyst and sterilization and disinfection method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0045] The initial concentration of E. coli in the 50ml reaction system was 10 6 CFU / mL, the degradation solution is sterile water, the light source is LED white light, and the light intensity is 40mW / cm 2 , the concentration of photocatalyst is 1mg / mL, the inactivation efficiency of E. coli after 5 hours of photocatalytic reaction is 99.95%; if no light is added and only photocatalyst is added, under the same conditions, the inactivation efficiency of E. coli is only 20%. It can be considered that there is no change within the error range; if only light is added and no photocatalyst is added, under the same conditions, the inactivation efficiency of Escherichia coli is about 60%. The corresponding photocatalytic sterilization effect diagram is as follows: figure 2 shown.

Embodiment 2

[0047] The inactivation efficiency of Escherichia coli under different light intensities was compared. The initial concentration of E. coli in the 50ml reaction system was 106 CFU / mL, the degradation solution is sterile water, the light source is LED white light, and the light intensity is changed to 20, 40, 60, 80mW / cm 2 , the concentration of photocatalyst is 1mg / mL, the inactivation efficiency of Escherichia coli after photocatalytic reaction for 5h is 99.3%, 99.95%, 99.96% and 99.996%, respectively, and the proportion of photolytic sterilization is 0%, 40%, 60% % and 99.1%.

Embodiment 3

[0049] The inactivation efficiency of Escherichia coli under different catalyst dosage conditions was compared. The initial concentration of E. coli in the 50ml reaction system was 10 6 CFU / mL, the degradation solution is sterile water, the light source is LED white light, and the light intensity is 40mW / cm 2 , changing the concentration of photocatalyst to 0.25, 0.5, 1.0, 1.5, 2.0mg / mL respectively, the inactivation efficiency of Escherichia coli after photocatalytic reaction for 5h was 98.6%, 99.2%, 99.9%, 99.996% and 99.997%, respectively.

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Abstract

The invention discloses a preparation method of a phenolic resin photocatalyst and a sterilization and disinfection method of the phenolic resin photocatalyst on a water body, air or the surface of anobject. Under the irradiation of visible light or ultraviolet light or sunlight, the phenolic resin photocatalyst generates electron hole pairs and various free radicals, and the electron hole pairsand the free radicals act on bacteria on a water body, air or the surface of an object to destroy the structure of the bacteria so as to cause death of the bacteria. The invention also discloses a preparation method of the phenolic resin photocatalyst. The phenolic resin photocatalyst has the advantages that the synthesis process is simple, catalysts with strong acid and strong alkali are not needed, the reaction temperature is low, the corrosion resistance is strong, the phenolic resin has corrosion resistance, the price is low, the required raw materials are cheap, the photocatalyst has visible light activity, responds to visible light and does not need ultraviolet light as an excitation light source, the specific surface area is large, and the phenolic resin photocatalyst is particularly suitable for treating low-concentration bacterial liquid wastewater, such as water directly taken from natural water.

Description

technical field [0001] The invention relates to a preparation method of a phenolic resin photocatalyst. The invention also relates to a method for sterilizing and disinfecting water bodies, air or object surfaces by the phenolic resin photocatalyst. Background technique [0002] Bacterial pollution can be seen everywhere, especially in water bodies. Bacterial multiplication and mutation will first poison aquatic organisms, and secondly threaten human health and safety, seriously affecting people's normal life. [0003] At present, there are mainly two major methods of water purification and disinfection, physical and chemical. Commonly used physical disinfection methods include heating, gamma radiation and ultraviolet irradiation. Among them, ultraviolet irradiation is the most widely used method, and the commonly used chemical method is adding heavy metal ions. , dosing alkali or acid, dosing surfactant, dosing oxidant (chlorine and its compounds, bromine, iodine, ozone), ...

Claims

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Application Information

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IPC IPC(8): B01J31/06C02F1/30C02F1/32C02F1/50C08G8/08
CPCB01J31/06C02F1/30C02F1/32C02F1/50C08G8/08C02F2303/04C02F2305/10B01J35/39Y02W10/37
Inventor 张冠宋霄
Owner HARBIN INST OF TECH SHENZHEN GRADUATE SCHOOL
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