Red phosphorus-based semiconductor antibacterial photocatalyst and preparation method thereof
A photocatalyst and semiconductor technology, which is applied in chemical instruments and methods, botanical equipment and methods, physical/chemical process catalysts, etc., can solve the problems of restricting practical applications and low photocatalytic activity, and achieve simple preparation methods and improved optical properties. Absorption, easy industrialization effect
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Embodiment 1
[0021] A preparation method of red phosphorus / titanium oxide composite photocatalyst, specifically:
[0022] Take 200mg of commercially available P25 titanium oxide powder and 50mg of red phosphorus and grind them evenly in a mortar; then package the mixture in a quartz tube and bake at 600°C for 4h. The red phosphorus / titanium oxide composite photocatalyst can be prepared.
[0023] Antibacterial performance test of red phosphorus / titanium oxide composite photocatalyst in water:
[0024] Take 50mg of red phosphorus / titanium oxide photocatalyst and disperse it in 50mL with a concentration of 2.9×10 6 In the aqueous solution of cfu / mL Escherichia coli, use 20mW / cm 2 The intensity of the xenon lamp simulates sunlight for irradiation. During the reaction, take out 1mL solution every 20min from the reactor, and in the ultra-clean workbench, the bacterial suspension taken out will be diluted successively with several gradients (10 -1 ~10 -5 ), and then take 100 μL from the bact...
Embodiment 2
[0027] A preparation method of red phosphorus / zinc oxide composite photocatalyst, specifically:
[0028] Take 200 mg of commercially available zinc oxide powder and 60 mg of red phosphorus and grind them evenly in a mortar; then ball mill them at 400 rpm for 12 hours under an argon or nitrogen protective atmosphere. The RP / zinc oxide composite photocatalyst can be prepared.
[0029] Antibacterial performance test of red phosphorus / zinc oxide composite photocatalyst:
[0030] Disperse a certain mass of red phosphorus / zinc oxide photocatalyst in a concentration of 6.5×10 6 In the aqueous solution of cfu / mL Staphylococcus aureus, use 20mW / cm 2 Light-intensity white LEDs are used for illumination. During the reaction, take out 1mL solution every 20min from the reactor, and in the ultra-clean workbench, the bacterial suspension taken out will be diluted successively with several gradients (10 -1 ~10 -5 ), and then take 100 μL from the bacterial suspension of different dilution...
Embodiment 3
[0033] A preparation method of red phosphorus / tantalum oxide composite photocatalyst, specifically:
[0034] Take 200mg of commercially available tantalum oxide powder and 40mg of red phosphorus and grind them evenly in a mortar; package the mixture in a quartz tube and bake at 500°C for 5h. Red phosphorus / tantalum oxide composite photocatalyst can be prepared.
[0035] Antibacterial performance test of red phosphorus / tantalum oxide composite photocatalyst:
[0036] Disperse a certain mass of red phosphorus / tantalum oxide photocatalyst in a concentration of 2.5×10 5 In the aqueous solution of cfu / mL Aspergillus flavus, use 20mW / cm 2 Light-intensity blue LEDs are irradiated. During the reaction, 1 mL of the solution was taken out from the reactor, and the fungal suspension taken out was diluted successively with several gradients (10 -1 ~10 -5 ), and then take out 100 μ L of bacterial suspensions with different dilutions and drop them on the prepared solid PDA medium. The...
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