Floating type photocatalytic material, preparation method and treatment device for degrading antibiotic wastewater by using floating type photocatalytic material
A technology of photocatalytic materials and catalytic materials, applied in the field of photocatalytic environmental protection, can solve the problems of reducing the recombination rate of carriers
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Embodiment 1
[0024] Take 0.014g Er(NO 3 ) 3 ·5H 2 O and 8g of melamine were dispersed in 10mL of nitric acid, stirred in a constant temperature water bath at 70°C for 2h. The mixture was dried in an oven at 70 °C for 12 h and ground into powder. The obtained powder was placed in a graphite crucible with a lid and calcined in a muffle furnace at 500 °C for 4 h to obtain ErCN. Take 10.443g B 2 o 3and 11.3508g melamine were dispersed in 150mL ultrapure water, and stirred in a constant temperature water bath at 70°C for 8h to prepare the BCN precursor. The BCN precursor was dried in an oven at 70 °C for 12 h and ground into powder. The obtained powder was placed in a graphite crucible with a lid and calcined in a muffle furnace at 1100 °C for 4 h. Take 5mg BCN and disperse it in 50mL N,N-dimethylformamide solution, sonicate for 2h to disperse evenly to obtain BCN solution. The BCN solution was then transferred to a 100 mL polytetrafluoroethylene-lined reactor for solvothermal reaction ...
Embodiment 2
[0026] Such as figure 1 As shown, a treatment device for degrading antibiotic wastewater by floating photocatalytic materials includes three main parts: reaction zone 3, aeration zone 5, and recovery zone 10, wherein reaction zone 3 includes floating photocatalyst 1, xenon lamp 2, outlet The water tank 8, the floating photocatalyst 1 and the xenon lamp 2 are arranged in the photocatalytic reaction zone 3, the two ends of the xenon lamp 2 are sealed and connected with the two ends of the photocatalytic reaction zone 3, and the right end of the photocatalytic reaction zone 3 is provided with a water tank 8. The aeration area is provided with water inlet 4 and air inlet 6 of water pipes. A return pump 7 is provided in the recovery area. The floating photocatalyst 1 is excited by the light emitted by the xenon lamp 2 or sunlight to generate the active material h + , OH and O 2 — , these active substances can degrade antibiotic wastewater. A large number of microbubbles genera...
Embodiment 3
[0028] The treatment device for degrading antibiotic wastewater by floating photocatalytic materials of the present invention will be further described below by treating water samples. First of all, the lower end of the photocatalytic reaction chamber is designed with water distribution pipe inlet 4 to continuously feed antibiotic waste water, and at the same time oxygen enters the aeration area through the air inlet 6. After being fully mixed, the raw water enters the reaction area 3. When the sunlight is insufficient (rainy and cloudy) Under certain conditions, the xenon lamp 2 is turned on, and the other xenon lamps 2 are turned off. Sunlight is used as the light source. After the catalytic degradation of the floating photocatalyst 1, the treated water sample enters the water outlet tank 8 and is discharged through the water outlet. When the valve A9 and valve B11 are opened, the return pump 7 is turned on, and the floating photocatalyst 1 will enter the recovery area 10 alo...
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