Preparation method and application of straw-based antibacterial activated carbon

A technology of activated carbon and straw, applied in the field of activated carbon, can solve the problems of high cost of antibacterial carrier, complex preparation process, poor adsorption, etc., and achieve the effects of abundant micropores, strong antibacterial broad-spectrum and strong adsorption performance.

Active Publication Date: 2021-09-07
QILU UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] Aiming at the problems of existing antibacterial carriers such as high cost, poor adsorption, low sterilization rate, comp

Method used

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  • Preparation method and application of straw-based antibacterial activated carbon
  • Preparation method and application of straw-based antibacterial activated carbon
  • Preparation method and application of straw-based antibacterial activated carbon

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] Embodiment 1: a kind of preparation method of straw-based antibacterial activated carbon is as follows:

[0036] (1) Pretreatment of rice straw to obtain straw powder: picking, drying, grinding and sieving the waste straw to obtain a powder with a particle size of 80 mesh;

[0037] (2) Pretreating the straw powder by microwave method to obtain a derived carbonaceous mesophase: sending the straw powder dried in step (1) into a microwave reactor, and heat-treating at 90° C. for 5 minutes;

[0038] (3) Carbonize the carbonaceous mesophase to obtain pyrolytic carbon: place the carbonaceous mesophase derived in step (2) in a tube furnace, purging with nitrogen, set the pyrolysis temperature to 550°C, and the pyrolysis time to 60 minutes, the heating rate is 10°C / min;

[0039] (4) Make silver nitrate antibacterial agent and potassium hydroxide activator into a solution, then impregnate pyrolytic carbon in 150mL solution containing silver nitrate and potassium hydroxide, wher...

Embodiment 2

[0043] Embodiment 2: a kind of preparation method of straw-based antibacterial activated carbon is as follows:

[0044](1) Cotton stalks are pretreated to obtain straw powder: the waste straws are selected, dried, ground, and sieved to obtain a powder with a particle size of 100 mesh;

[0045] (2) Pretreating the straw powder by microwave method to obtain a derived carbonaceous mesophase: sending the straw powder dried in step (1) into a microwave reactor, and heating at 60° C. for 8 minutes;

[0046] (3) Carbonize the carbonaceous mesophase to obtain pyrolytic carbon: place the carbonaceous mesophase derived in step (2) in a tube furnace, purging with nitrogen, set the pyrolysis temperature to 650°C, and the pyrolysis time to 45 minutes, the heating rate is 5°C / min;

[0047] (4) Make a solution of zinc sulfate antibacterial agent and potassium hydroxide activator, then impregnate pyrolytic carbon in 150mL solution containing zinc sulfate and potassium hydroxide, wherein the ...

Embodiment 3

[0079] Antibacterial detection: Escherichia coli and Staphylococcus aureus are used as the strains, and the sterilization rate is detected and calculated using the scheme in GB21551.2-2010.

[0080] The antibacterial experiment process is as follows: boil solid medium (10g of peptone, 5g of beef extract, 5g of sodium chloride, 17.5g of agar, 1000ml of distilled water), pour it into an Erlenmeyer flask, and pass through a pressure steam sterilizer under high pressure (120°C, 1.5 MPa) after being sterilized for 20 minutes, it was dispensed into petri dishes while it was hot, and cooled under aseptic conditions to obtain a solid medium. The cultured Escherichia coli liquid was made into a concentration of 5.0×10 5 -10×10 5 For cfu / ml bacterial suspension, take a round sample with a diameter of 50mm, draw 1.0±0.1ml of bacterial solution and inoculate it on the sample to ensure that the bacterial solution is evenly distributed and does not touch the wall. Tighten the cover to prev...

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Abstract

The invention belongs to the technical field of activated carbon, and particularly relates to a preparation method and application of straw-based antibacterial activated carbon. An inorganic antibacterial material which has alkali resistance, acid resistance, high stability, broad spectrum, antibacterial durability, no drug resistance and no secondary pollution is adopted, waste straw is prepared into straw powder, pretreatment is performed through a microwave method to obtain a derived carbonaceous intermediate phase, high-temperature carbonization is performed on the carbonaceous intermediate phase, a solution is prepared by using antibacterial ions, the straw-based antibacterial activated carbon is obtained by taking straw carbon as a carrier to impregnate and support antibacterial ions and an active agent and then performing activating treatment, and can be used for industrial production and daily adsorption sterilization and deodorization; the antibacterial active carbon prepared by the method is high in sterilization rate, small in antibacterial ion usage amount, free of drug resistance, strong in antibacterial broad spectrum, high in porosity, safe to human bodies and environment, simple and convenient in preparation process condition, low in cost and considerable in application prospect, and has sterilization and deodorization effects.

Description

technical field [0001] The invention belongs to the technical field of activated carbon, and in particular relates to a preparation method and application of straw-based antibacterial activated carbon. Background technique [0002] The information disclosed in this background section is only intended to increase the understanding of the general background of the present invention, and is not necessarily taken as an acknowledgment or any form of suggestion that the information constitutes the prior art already known to those skilled in the art. [0003] Agricultural straw is composed of bio-organic polymers such as lignin, cellulose and hemicellulose, and is a recyclable green resource with huge reserves. However, most straws are treated as waste, and the value of lignin and cellulose in straws has not been fully utilized. The inability to effectively utilize straw resources is not only a huge waste of resources, but also a problem of environmental protection. Rational use ...

Claims

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Application Information

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IPC IPC(8): C01B32/318C01B32/342C01B32/348
CPCC01B32/318C01B32/342C01B32/348
Inventor 李欢颜廷煜任常在李志浩王鑫宇刘美雪王旭东
Owner QILU UNIV OF TECH
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