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Nano cerium oxide silver-loaded catalyst, manufacturing method and purpose thereof

A nano-cerium oxide and catalyst technology, which is applied in the field of room temperature sterilization catalysts, can solve the problems of no evaluation of the bactericidal effect of antibacterial agents, high cost, and no mention of the dissolution of silver ions, and achieve low operating costs and excellent bactericidal effects.

Active Publication Date: 2013-06-05
RES CENT FOR ECO ENVIRONMENTAL SCI THE CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] In recent years, catalytic oxidation technology, especially with semiconductor materials such as TiO 2 Photocatalytic oxidation technology as a catalyst has become a research hotspot in sterilization and disinfection technology, but the problem in its practical application is that it needs to use ultraviolet light or near ultraviolet light to excite TiO 2 Produces strong oxidizing intermediates to kill microorganisms, which makes the overall equipment of this technology complex and leads to high costs
But this invention has only evaluated the bacteriostatic effect of this antibacterial agent, has not evaluated the bactericidal effect of this antibacterial agent, and, also does not mention the stripping problem of silver ion

Method used

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  • Nano cerium oxide silver-loaded catalyst, manufacturing method and purpose thereof
  • Nano cerium oxide silver-loaded catalyst, manufacturing method and purpose thereof
  • Nano cerium oxide silver-loaded catalyst, manufacturing method and purpose thereof

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Effect test

Embodiment 1

[0046] A nano-cerium oxide-supported silver catalyst, composed of carrier nano-cerium oxide and active center silver, silver accounts for 1% by mass of the nano-cerium oxide-supported silver catalyst, and nano-cerium oxide accounts for 99% by mass of the nano-cerium oxide-supported silver catalyst %; The nano cerium oxide is cerium oxide nanorods.

[0047] The preparation method of above-mentioned nano cerium oxide supported silver catalyst is:

[0048] (1) The hydrothermal method was used to prepare cerium oxide nanorods. The main steps were as follows: add about 3 g of cerium nitrate to the liner of a 100 mL hydrothermal reaction kettle, and add 10 mL of deionized water to dissolve. Add 50mL of 2.5~20mol / L sodium hydroxide solution dropwise to the cerium nitrate solution, add 20mL of deionized water after the dropwise addition and continue to stir for 15min, then transfer it to the reaction kettle and place it at a constant temperature of 100~160℃ Heating in the box for 12~...

Embodiment 2

[0051] A nano-cerium oxide-supported silver catalyst, composed of carrier nano-cerium oxide and active center silver, silver accounts for 1% by mass of the nano-cerium oxide-supported silver catalyst, and nano-cerium oxide accounts for 99% by mass of the nano-cerium oxide-supported silver catalyst %; The nano-cerium oxide is cerium oxide nano-cubes.

[0052] The preparation method of above-mentioned nano cerium oxide supported silver catalyst is:

[0053] (1) Preparation of cerium oxide nanocubes by hydrothermal method: Add about 3 g of cerium nitrate to the liner of a 100 ml hydrothermal reaction kettle, and add 60 ml of deionized water to dissolve. Add an appropriate amount of 1mol / L sodium hydroxide solution dropwise to the cerium nitrate solution, continue to stir for 15 minutes after the dropwise addition, then transfer it to the reaction kettle, put it in a thermostat at 100~140°C for 12 hours, and the obtained precipitate Centrifuge and dry with deionized water, and ba...

Embodiment 3

[0056] A nano-cerium oxide-supported silver catalyst, composed of carrier nano-cerium oxide and active center silver, silver accounts for 1% by mass of the nano-cerium oxide-supported silver catalyst, and nano-cerium oxide accounts for 99% by mass of the nano-cerium oxide-supported silver catalyst %; The nano cerium oxide is cerium oxide nanoparticles.

[0057] The preparation method of above-mentioned nano cerium oxide supported silver catalyst is:

[0058] (1) The method of preparing cerium oxide nanoparticles by precipitation method is as follows: add about 3 g of cerium nitrate into a 100 mL beaker, and add 60 mL of deionized water to dissolve. Add about 21mL of 1mol / L sodium hydroxide solution to the cerium nitrate solution dropwise, and control the pH value to 11~12, continue to stir for 15min after the dropwise addition, and let it stand at room temperature for 12~24h. The obtained precipitate is washed with deionized water After centrifugal cleaning, dry, and bake in ...

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Abstract

The invention relates to a nano cerium oxide silver-loaded catalyst which is composed of carrier nano cerium oxide and activate center silver. The mass percent of the silver in the nano cerium oxide silver-loaded catalyst is 1-6 percent. The mass percent of the nano cerium oxide in the nano cerium oxide silver-loaded catalyst is 94-99 percent. The nano cerium oxide is any one or a mixture of two of a cerium oxide nano rod, a cerium oxide nano cube and a cerium oxide nano particle. Nano cerium oxide silver-loaded catalysts with different appearances are used for room temperature catalyzing and sterilization, and a sterilization effect is quite good. A 1wt%Ag / CeO2 catalyst can reduce clump count of escherichia coli by more than three orders of magnitudes, bactericidal activity is increased as silver capacity is increased, and the cerium oxide nano rod, the cerium oxide nano cube and the nano cerium oxide silver-loaded catalyst show different bactericidal activities.

Description

technical field [0001] The invention relates to a room-temperature sterilization catalyst, in particular, the invention relates to a nano-cerium oxide-supported silver catalyst, a preparation method and an application thereof. Background technique [0002] With the improvement of people's requirements for health and quality of life, it has gradually become a social consensus to reduce and effectively prevent the impact and harm of bacteria in the human living environment on human life, and to alleviate the adverse results of bacterial infection, poisoning and disease caused by it. The demand for antimicrobial agents is increasing day by day. [0003] In recent years, catalytic oxidation technology, especially with semiconductor materials such as TiO 2 The photocatalytic oxidation technology as a catalyst has become a research hotspot in sterilization and disinfection technology, but the problem in its practical application is that it needs to use ultraviolet light or near u...

Claims

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Application Information

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IPC IPC(8): B01J23/66A01N59/16A01P1/00
Inventor 贺泓王莲张长斌余运波何莲
Owner RES CENT FOR ECO ENVIRONMENTAL SCI THE CHINESE ACAD OF SCI