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Nanometer mesoporous cerium oxide carrying silver antimicrobials and method for preparing the same

A nano-mesoporous and cerium oxide technology, applied in the field of antibacterial agents, can solve the problems of weak action force and inability to intensify the antibacterial properties of silver, and achieve the effects of enhanced antibacterial activity, good inhibition and killing effects, and excellent antibacterial properties.

Inactive Publication Date: 2008-03-12
SHANGHAI NORMAL UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the interaction between these carriers and silver is weak, and the antibacterial properties of silver cannot be stimulated, so it is necessary to develop new carriers to enhance the antibacterial effect

Method used

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  • Nanometer mesoporous cerium oxide carrying silver antimicrobials and method for preparing the same
  • Nanometer mesoporous cerium oxide carrying silver antimicrobials and method for preparing the same

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] Dissolve 0.005 mole of phenol and 0.005 mole of m-aminophenol in 40 mL of water to form solution A; dissolve 1.05 g of formaldehyde solution (37 wt %) and 0.005 mole of cerium nitrate hexahydrate into 40 mL of water to form solution B. Under the condition of vigorous stirring, solution A and solution B were mixed, and then 28% concentrated ammonia solution was added dropwise to adjust the pH to 9-10. After stirring for 2 hours, put it into a hydrothermal kettle, and age at 373K for 5 days. Cooling, centrifugation, washing, drying, calcination at 873K for 6h under the protection of nitrogen, and 10h at 723K in air to prepare nanometer mesoporous cerium oxide carrier.

Embodiment 2

[0025] Dissolve 0.005 mole of phenol and 0.003 mole of m-aminophenol in 40 mL of water to form solution A; dissolve 1.05 g of formaldehyde solution (37 wt %) and 0.01 mole of cerium nitrate hexahydrate into 40 mL of water to form solution B. Under the condition of vigorous stirring, solution A and solution B were mixed, and then 28% concentrated ammonia solution was added dropwise to adjust the pH to 9-10, stirred for 2 hours, then put into a hydrothermal kettle, and aged at 393K for 3 days. Cooling, centrifugation, washing, drying, calcination at 773K for 4 hours under the protection of nitrogen, and then calcination at 723K in air for 6 hours, to prepare nanometer mesoporous cerium oxide carrier.

Embodiment 3

[0027] Dissolve 0.005 mole of phenol and 0.005 mole of m-aminophenol in 40 mL of water to form solution A; dissolve 1.05 g of formaldehyde solution (37 wt %) and 0.01 mole of cerium nitrate hexahydrate into 40 mL of water to form solution B. Under the condition of vigorous stirring, solution A and solution B were mixed, and then 28% concentrated ammonia solution was added dropwise to adjust the pH to 9-10, stirred for 2 hours, then put into a hydrothermal kettle, and aged at 373K for 3 days. Cooling, centrifugation, washing, drying, calcination at 973K for 4h under the protection of nitrogen, and calcination at 673K ​​in air for 10h, to prepare nanometer mesoporous cerium oxide carrier.

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Abstract

The present invention discloses a nano-sized mesoporous cerium oxide silver-carrying antiseptic and the preparation method. The antiseptic takes nano-sized mesoporous cerium oxide as the carrier and the silver as the active center; the silver content is 1.0 to 10 percent and the quantity content of the nano-sized mesoporous cerium oxide carrier is 90 to 99 percent. With the preparation mehod, the nano-sized mesoporous cerium oxide is added into the silver nitrate solution and mixed until being dried after being dispersed by ultrasonic; the mixture is baked for 2 to 4 hours under 573K to 773K to make the mesoporous cerium oxide silver-carrying antiseptic. The nano-sized mesoporous cerium oxide is taken as the carrier so that the antiseptic function of silver can be activated; at the same time, the carrier is high temperature resistant and can promote the antiseptic effect. The preparation method is simple and the antiseptic has excellent antiseptic function on colon bacillus and staphylococcus aureus. Therefore, the present invention can be widely used in fields such as ceramics, plastic, daily necessities, water treatment, etc.

Description

technical field [0001] The invention relates to the field of antibacterial agents, in particular to a nanometer mesoporous cerium oxide-loaded silver antibacterial agent and a preparation method 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. Existing antibacterial agents can be divided into organic, natural and inorganic three series. Organic antibacterial agents are gradually being eliminated due to problems such as poor safety, poor chemical stability, poor heat resistance, easy to produce drug resistance, and secondary pollution; natural antibacterial agents are mainly natural plant extracts, ...

Claims

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Application Information

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IPC IPC(8): A01N59/16A01N25/08A01P1/00
Inventor 李和兴陆斌李辉
Owner SHANGHAI NORMAL UNIVERSITY
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