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Nano TiO2 carrying metal ion antibacterial agent and its preparing method

A technology of nano-titanium dioxide and metal ions, applied in botany equipment and methods, biocides, disinfectants, etc., can solve the problem that light and heat conditions are greatly affected, the catalytic antibacterial effect is unsatisfactory, and the antibacterial effect cannot be effectively improved. question

Inactive Publication Date: 2006-05-24
QINGDAO UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although the development and development of nano-titanium dioxide antibacterial properties have achieved great results in theory and practice, since the catalytic and bactericidal properties of nano-titanium dioxide are mainly caused by ultraviolet light excitation, in environments with low light utilization or lack of light, catalytic antibacterial unsatisfactory effect
Furthermore, inorganic antibacterial agents that use antibacterial metal ions such as silver, copper, and zinc to exert antibacterial effects are greatly affected by light and heat conditions, and are generally not suitable for use alone. Therefore, they are often added to ceramic carriers to make slow-release antibacterial agents. , or use the high temperature resistance of phosphate, silicate and other carriers to immobilize silver, copper, zinc and other metal ions on the surface of materials with high surface activity such as zeolite, silica gel and phosphate by physical adsorption or ion exchange. become an antibacterial agent, but still have the defect that it cannot effectively improve its antibacterial effect in the light environment

Method used

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  • Nano TiO2 carrying metal ion antibacterial agent and its preparing method
  • Nano TiO2 carrying metal ion antibacterial agent and its preparing method
  • Nano TiO2 carrying metal ion antibacterial agent and its preparing method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] Embodiment 1: first with 3g nano-titanium dioxide raw material (properties refer to figure 1 ) soaked in 50ml deionized water, soaked for 5min, soaked at 40°C, dispersed by ultrasonic wave, dispersed for 20min, then added 0.425g of silver nitrate for mixing and dissolving, and stirred it. During this process, the pH value of the mixture Use 0.1mol / L sulfuric acid (nitric acid) to adjust to 3, the temperature of mixing and stirring is 30°C, the time of mixing and stirring is 5h, the solid is obtained by centrifugal filtration, dried at 80°C for 3 hours, and the dried solid The product was roasted at 400° C. for 5 hours, and then ground with a ball mill to obtain a finished antibacterial agent, that is, titanium dioxide-loaded silver ion (silver ion attached to the carrier) antibacterial agent. Its properties and characteristics can be found in image 3 . The titanium dioxide-loaded silver ion antibacterial agent is used for finishing cotton fabrics, and the antibacteria...

Embodiment 2

[0028] Embodiment 2: first immerse 3g nano-titanium dioxide in 50ml deionized water, soak 20min, soak temperature 30 ℃, adopt ultrasonic wave to disperse, disperse time 30min, then add 0.24g silver nitrate and 0.06g zinc sulfate (between the two molar ratio is 3: 1) the mixture is mixed and dissolved, and it is stirred. During this process, the pH value of the mixed solution is adjusted to 5 with 0.1mol / L sulfuric acid (nitric acid), and the temperature of mixing and stirring is 50°C. The time is 7 hours, the solid is obtained by centrifugal filtration, dried at 100°C for 2 hours, the dried solid is roasted at 450°C for 4 hours, and then ground with a ball mill to obtain the finished antibacterial agent, namely titanium dioxide loaded with silver and zinc ion antibacterial agent.

[0029] In addition to the above-mentioned combination of silver nitrate and zinc sulfate, metal salts also have combinations of silver nitrate and copper nitrate, copper nitrate and zinc sulfate, an...

Embodiment 3

[0031] Example 3: First soak 3g of nano-titanium dioxide in 50ml of deionized water, soak for 40min, soak at a temperature of 15°C, and disperse with ultrasonic waves for 50min, then add 0.182g of silver nitrate, 0.045g, zinc sulfate and 0.045g of copper nitrate (The molar ratio between the three is 3:1:3) the mixture is mixed and dissolved, and it is stirred. During this process, the pH value of the suspension is adjusted to 7 with 0.1mol / L sulfuric acid (nitric acid), and mixed and stirred The temperature is 70°C, the mixing and stirring time is 10h, the solid is obtained by centrifugal filtration, dried at 125°C for 1.5 hours, the dried solid is roasted at 500°C for 3 hours, and then ground with a ball mill to obtain the finished antibacterial product The antibacterial agent is titanium dioxide loaded with silver, zinc and copper ions, and its properties and characteristics can be found in Figure 4 .

[0032] After testing, it is known that the combination of three metal ...

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Abstract

The present invention discloses an antimicrobial agent by using nano titanium dioxide as carrier and making antimicrobial metal ions be attached to the nano titanium dioxide carrier. Its grain size is less than 100 nm, and its preparation method includes the following steps: soaking nano titanium dioxide, utilizing ultrasonic wave to disperse titanium dioxide soaking liquor, then adding metal salt containing antimicrobial metal ions, mixing them and dissolving them, fully stirring, making solid-liquid separation to obtain solid material, drying, roasting and grinding so as to obtain the invented product.

Description

technical field [0001] The invention relates to a sterile antibacterial agent and a preparation method thereof, in particular to a nano titanium dioxide-loaded metal ion antibacterial agent and a preparation method thereof. Background technique [0002] With the improvement of people's living standards, there are higher requirements for the antibacterial properties of daily necessities, medical supplies, environmental protection products, food packaging, water treatment devices, etc., and materials with bactericidal and antibacterial effects are more and more concerned and valued by people. . According to different materials, basic antibacterial agents can be divided into inorganic antibacterial agents and organic antibacterial agents according to the antibacterial active ingredients. At present, organic antibacterial agents are widely used in most antibacterial materials, which have strong antifungal effect, but poor antibacterial effect, low heat resistance and other stab...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A01N59/16A01P1/00
Inventor 朱平王炳隋淑英张建波王怀芳
Owner QINGDAO UNIV
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