A preparation method of antibacterial and deodorizing materials based on carbon nano silver photocatalyst
A technology of carbon nanometer and silver light, which is applied in botany equipment and methods, deodorization, chemicals for biological control, etc., can solve the problems of limited application range and large energy consumption, and achieve enhanced antibacterial effect and prolonged antibacterial effect. time, operability and strong effect
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Embodiment 1
[0025] A preparation method of an antibacterial and deodorizing material based on carbon nano-silver photocatalyst, specifically prepared through the following steps:
[0026] 1) Add 0.3 g of nanoparticle carbon into 5 mL of absolute ethanol, and obtain nanoparticle carbon suspension A by ultrasonication;
[0027] 2) Add 4 mL of tetrabutyl titanate to a mixture of 45 mL of ethanol and acetic acid, and stir magnetically for 0.5 h to obtain a mixture B;
[0028] 3) Suspension A is mixed with mixed solution B, and mixed solution C of ethanol and water is added under magnetic stirring conditions to form a gel;
[0029] 4) drying the above gel at 30°C for 5-7 hours to obtain a composite material precursor, and then calcining at 600-800°C for 1-2 hours to obtain nano-carbon / titanium dioxide composite powder;
[0030] 5) Take 1g of nano-carbon / titanium dioxide composite material powder, add it to 200mL silver nitrate solution with a concentration of 0.01mol / L, and stir to obtain a m...
Embodiment 2
[0034] Weigh 0.1 g of the carbon nano-silver photocatalyst composite material prepared in Example 1, and use an X-ray diffractometer to analyze the phase composition of the composite material. The working temperature is room temperature, copper target Kα (λ=0.15418nm) radiation is used, the accelerating voltage is 40kV, the emission current is 30mA, and the scanning speed is 0.5(°) / min.
[0035] Take by weighing 0.1 g of titanium dioxide powder and 0.1 g of the carbon nano-silver photocatalyst composite material powder prepared in Example 1, place them in 100 mL of dehydrated alcohol respectively, shake with 100 Hz ultrasonic waves for 60 min, leave to settle for 6 h, take the supernatant, and use Water and ethanol were used as a reference, and the spectrum was scanned with a UV-Vis spectrophotometer.
[0036] The X-ray diffraction pattern of carbon nano silver photocatalyst composite material is as follows: figure 1 Shown: The composite material has strong diffraction peaks ...
Embodiment 3
[0039] The carbon nano-silver photocatalyst composite material prepared in Example 1 is compared with titanium dioxide and 0.1% silver nitrate, and the antibacterial performance of the composite material is examined. The specific steps are as follows:
[0040] 1) Plate making: Take 3 sets of sterile petri dishes, pour the beef extract peptone medium that has been melted and cooled to about 50°C into the petri dishes according to the aseptic method, and place them horizontally until solidified.
[0041] 2) Preparation of bacterial suspension: Take 3 test tubes of sterile water, use an inoculation loop to take 1-2 rings each of Escherichia coli, Staphylococcus aureus, and Bacillus subtilis into sterile water, and mix well to make a bacterial suspension. liquid.
[0042] 3) Inoculation: Inoculate 0.1ml of the prepared bacterial suspension with a sterile pipette and inoculate on the plate, and spread evenly with a sterile triangular applicator.
[0043] 4) Dosing: Divide the coat...
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