Method for forming heteronitrogen nano TiO2 light catalytic activity coating on substrate
A nano-titanium dioxide and activator technology, applied in physical/chemical process catalysts, chemical instruments and methods, catalyst activation/preparation, etc., can solve the problems of secondary pollution, easy to suffer from photocorrosion environment, not photocatalytic materials, etc. The material coating is firm, the method is simple and convenient, and the effect of high photocatalytic activity
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Embodiment 1
[0033] First polish the side of the metal aluminum plate to be coated, then heat it to 500°C, keep the temperature for 3 hours, and use plasma spraying equipment to spray anatase phase nano-titanium dioxide powder with an average particle size of 52.0nm on the polished side , while doping with nitrogen, the doping ratio is about 1wt% (N / TiO 2 wt%). Among them, the spray gun is an internal powder-feeding spray gun, and the discharge form is DC discharge. The working gas used in spraying is a mixed gas of ammonia and argon, and the gas volume ratio is NH 3 / Ar=2:1, the pressure of the working gas is 0.5Mpa, the total gas flow is 40.0M 3 / h. Other parameters are: the power is 27.5kW, the powder feeding flow rate is 60g / min, the spray distance is 200mm, and the coating thickness is controlled at about 1.0μm. After spraying, keep the aluminum plate at a constant temperature of 300° C. for 2 hours, and cool it down to room temperature naturally to obtain a nitrogen-titanium diox...
Embodiment 2
[0035] Clean the glass sheet first, then heat it to 200°C, keep the temperature for 4 hours, use plasma spraying equipment to spray rutile phase nano-titanium dioxide powder with an average particle size of 80.0nm on the clean surface, and do nitrogen doping at the same time , the doping ratio is about 8wt% (N / TiO 2 wt%). Among them, the spray gun is an internal powder-feeding spray gun, and the discharge form is DC discharge. The working gas used in spraying is a mixed gas of ammonia and argon, and the gas volume ratio is NH 3 / Ar=1.5:1, the pressure of the working gas is 0.5Mpa, the total gas flow is 40.0M 3 / h. The powder feeding gas is argon. Other parameters are: spray distance 250mm, powder feeding flow rate 50g / min, power 25.0kW, control coating thickness about 0.8μm. After spraying, the glass sheet was kept at a temperature of 300°C for 3 hours, and then naturally cooled to room temperature. A coating coated with nitrogen nano-titanium dioxide can be obtained on ...
Embodiment 3
[0037] Clean the porous ceramic plate first, then heat it to 400° C., and after constant temperature for 2 hours, use plasma spraying equipment to spray it with anatase phase and rutile phase nano-titanium dioxide powder with an average particle size of 62.0 nm ( A / R=3 / 7), nitrogen doping is performed at the same time. The doping ratio is about 15wt% (N / TiO 2 wt%). Nitrogen (N 2 ) and argon (Ar) is the working gas, and the volume ratio of nitrogen to argon in the mixed gas is N 2 / Ar=1:1, the pressure of the working gas is 0.7Mpa, the total gas flow is 45.0M 3 / h, using argon as the powder feeding gas. Other parameters are: spray distance 200mm, powder feeding flow rate 30g / min, power 40.5kW, control coating thickness at about 1.0μm. After spraying, the porous ceramic plate was kept at a temperature of 400° C. for 2 hours, and then naturally cooled to room temperature. Under the operating frequency of the ultrasonic instrument at 20 Hz, the porous ceramic plate loaded wi...
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