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Photocatalytic material for degrading antibiotics as well as preparation method and application of photocatalytic material

A photocatalytic material and technology of catalytic material, applied in the field of photocatalytic material and its preparation, can solve the problems of high light absorption range and photogenerated electron-hole recombination rate

Active Publication Date: 2021-05-11
GUANGDONG UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the problems of light absorption range and high photogenerated electron-hole recombination rate, its higher catalytic activity and wider range of applications are limited.

Method used

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  • Photocatalytic material for degrading antibiotics as well as preparation method and application of photocatalytic material
  • Photocatalytic material for degrading antibiotics as well as preparation method and application of photocatalytic material
  • Photocatalytic material for degrading antibiotics as well as preparation method and application of photocatalytic material

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] Embodiment 1 Photocatalytic material and preparation method thereof

[0031] 1) Put 5 g of melamine and 20 mg of phytic acid into an agate mortar for thorough grinding and mixing, then put them into a muffle furnace and heat at a constant temperature of 550° C. for 4 hours at a heating rate of 5° C. / min. After the heating is completed, it is cooled for later use, and the heated product P-C 3 N 4 Continue to grind for 20 minutes, grind it into a powder with uniform particles, and store it for future use;

[0032] 2) Heating bismuth nitrate pentahydrate at a constant temperature of 550°C for 4h at a heating rate of 5°C / min to prepare pure-phase Bi 2 o 3 ;

[0033] 3) Bi 2 o 3 / P-C 3 N 4 Preparation: Weigh 0.312g of Bi prepared in step 22 o 3 , 5g of melamine and 20mg of phytic acid were thoroughly mixed in an agate mortar, ground and transferred to a corundum crucible with a lid. Subsequently, it was placed in a muffle furnace and heated at 500° C. for 4 hours a...

Embodiment 2

[0035] Embodiment 2 Levofloxacin photocatalytic degradation experiment

[0036] Photocatalytic experiments were carried out in a photochemical reactor at room temperature:

[0037] 1) Get the P-C prepared in 50mg embodiment 1 3 N 4 、 Bi 2 o 3 or photocatalytic materials (Bi 2 o 3 / P-C 3 N 4 ) into the quartz test tube, adding 50mL concentration is the levofloxacin detection solution of 10mg / L, and the concentration at this moment is denoted as C 0 ; The detection solution without adding any catalyst was used as a blank control.

[0038] 2) Put the quartz test tube containing the detection system into the photoreaction instrument. After the instrument is adjusted, react according to the following process: first, carry out 30min dark reaction, so that the prepared photocatalytic material and levofloxacin reach the adsorption-desorption equilibrium; After the dark reaction, turn on the 500w xenon lamp (simulated sunlight), extract 1.5mL of the detection solution at inter...

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Abstract

The invention provides a photocatalytic material for degrading antibiotics. The photocatalytic material is a Z-type photocatalytic material, and the active component of the photocatalytic material is a Z-type Bi2O3 / P-C3N4 heterojunction. Experiments prove that 89.2% of levofloxacin can be degraded within 75 minutes. After being recycled for four times, the photocatalytic material (Bi2O3 / P-C3N4) still shows efficient photocatalytic performance, and the degradation efficiency still reaches 80% after being recycled for four times, which shows that the photocatalytic material (Bi2O3 / P-C3N4) is stable in photocatalytic performance, high in corrosion resistance and high in levofloxacin degradation efficiency, and is a composite photocatalytic material high in degradation efficiency and good in reusability.

Description

technical field [0001] The invention relates to the field of environmental governance, in particular to a photocatalytic material for degrading antibiotics, a preparation method and application thereof. Background technique [0002] With the widespread use of antibiotics in humans and animals, the problem of bacterial resistance has emerged, posing a huge threat to ecosystems and human health. Antibiotics, such as β-lactams, tetracyclines, and quinolones, are often detected in surface water and groundwater around the world due to urban sewage discharge. However, the traditional water treatment process is not ideal for the removal of antibiotics, and its biodegradability is poor. Levofloxacin is a broad-spectrum antibiotic with antibacterial properties and has been listed as one of the most commonly used quinolone antibiotics. Therefore, it is urgent to find a simple and efficient method to remove levofloxacin in water. [0003] Photocatalytic technology is considered to b...

Claims

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Application Information

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IPC IPC(8): B01J27/24C02F1/30C02F101/38
CPCB01J27/24C02F1/30C02F2101/38C02F2305/10B01J35/39Y02W10/37
Inventor 张远张新飞蔡宴鹏杨志峰贾晓波王子为张楠李飞龙
Owner GUANGDONG UNIV OF TECH
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