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Metal bismuth nanoparticle modified porous carbon nitride composite material and preparation method thereof, and application of metal bismuth nanoparticle modified porous carbon nitride composite material in removing antibiotics in water

A composite material, bismuth nanotechnology, applied in chemical instruments and methods, water treatment of special compounds, metal/metal oxide/metal hydroxide catalysts, etc., can solve the serious recombination of photogenerated electrons and holes and limit photocatalytic performance , unfavorable practical application and other problems, to achieve the effect of narrow particle size distribution, obvious removal effect, good stability and biocompatibility

Active Publication Date: 2021-04-27
SHANGHAI UNIV OF MEDICINE & HEALTH SCI
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, g-C 3 N 4 The serious recombination of photogenerated electrons and holes limits its photocatalytic performance to a large extent.
In order to improve the photocatalytic performance of carbon nitride, the Chinese patent document with the application publication number CN 107262133 A discloses a solvothermal reduction method to prepare bismuth / g-C 3 N 4 Composite materials, the catalytic performance of composite materials has been greatly improved, but the preparation process is complex, using heating conditions, time-consuming, unfavorable for practical application; application publication number is disclosed in the Chinese patent literature of CN 109507255 A using solvothermal The method for preparing bismuth / carbon nitride material by reaction method, the particle diameter of the obtained bismuth sphere is about 200nm, in g-C 3 N 4 Inhomogeneous dispersion can not bring into play its effect to the greatest extent, because the particle size and dispersibility of photocatalyst play an important role in the improvement of photocatalytic performance; the preparation method of above-mentioned disclosed bismuth / carbon nitride adopts organic solvent heating reaction process And the heating time is long, there are defects such as unsafe and solvent volatilization that are not conducive to large-scale commercial production

Method used

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  • Metal bismuth nanoparticle modified porous carbon nitride composite material and preparation method thereof, and application of metal bismuth nanoparticle modified porous carbon nitride composite material in removing antibiotics in water
  • Metal bismuth nanoparticle modified porous carbon nitride composite material and preparation method thereof, and application of metal bismuth nanoparticle modified porous carbon nitride composite material in removing antibiotics in water
  • Metal bismuth nanoparticle modified porous carbon nitride composite material and preparation method thereof, and application of metal bismuth nanoparticle modified porous carbon nitride composite material in removing antibiotics in water

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0069] Dissolve 0.21mmol of bismuth nitrate pentahydrate, 2.1mmol of glucose and 0.62mmol of morpholine borane in 1mL, 2mL and 2mL of 1,2-propanediol, respectively, and transfer the above three solutions to a 50mL double-necked circular tube under the protection of argon. In the bottom flask, continue to pass the gas, seal the bottle mouth, stir and mix evenly, put the round bottom flask into a 260W ultrasonic machine, and ultrasonicate at 25°C for 10min, the color of the mixed solution gradually changes from white to gray black, pour the mixed solution The reaction was terminated by adding 10 mL of pure water, dialyzed in a 3500 MWCO dialysis bag for 2 days, and vacuum / freeze-dried to obtain metallic bismuth nanoparticles (referred to as BiNPs).

[0070] Porous carbon nitride was prepared by pyrolysis and liquid phase exfoliation. The specific process was as follows: put 10g of urea into a 50mL crucible, cover it, and raise the temperature to 550°C at a heating rate of 2.3°C / m...

Embodiment 2

[0075] Metal bismuth nanoparticles and porous carbon nitride were prepared according to the method in Example 1. The difference from Example 1 was that the metal bismuth nanoparticles and porous carbon nitride were ultrasonically dispersed in water at a mass ratio of 1:11.5, and the ultrasonic power was 260W. Ultrasound for 10 minutes, centrifugation, and vacuum / freeze drying to obtain a porous carbon nitride composite material modified with metal bismuth nanoparticles. The mass content of metal bismuth in the composite material is 8%.

[0076] Figure 4 For the characterization of the structure and morphology of the composite material, the structure and morphology of the composite material is consistent with the material in Example 1, the difference is that the content of bismuth nanoparticles is less, indicating that by controlling the quality of metal bismuth nanoparticles and porous carbon nitride Ratio, the content of metal bismuth nanoparticles can be well controlled.

Embodiment 3

[0078] Metal bismuth nanoparticles and porous carbon nitride were prepared according to the method of Example 1. The difference from Example 1 was that the metal bismuth nanoparticles and porous carbon nitride were ultrasonically dispersed in water at a mass ratio of 1:24, and the ultrasonic power was 260W. Ultrasound for 10 minutes, centrifugation, and vacuum / freeze drying to obtain a porous carbon nitride composite material modified with metal bismuth nanoparticles. The mass content of metal bismuth in the composite material is 4%.

[0079] Figure 5 For the characterization of the structure and morphology of the composite material, the structure and morphology of the composite material is consistent with the material in Example 1, except that the distribution density of bismuth nanoparticles on the porous carbon nitride is small.

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Abstract

The invention discloses a metal bismuth nanoparticle modified porous carbon nitride composite material and a preparation method thereof, and application of the metal bismuth nanoparticle modified porous carbon nitride composite material in removing antibiotics in water. The preparation method comprises the following steps: with bismuth salt, a low-molecular-weight saccharide compound and a borane compound as raw materials, carrying out an ultrasonic reaction to prepare metal bismuth nanoparticles; with porous carbon nitride as a raw material, conducting ultrasonic stripping to obtain dispersion liquid containing the porous carbon nitride; and carrying out ultrasonic electrostatic assembling on the metal bismuth nanoparticles and the dispersion liquid containing the porous carbon nitride so as to obtain the metal bismuth nanoparticle modified porous carbon nitride composite material. The method is simple in process, environment-friendly in raw materials, low in energy consumption and suitable for large-scale industrial production; the bismuth nanoparticles in the prepared composite material are small in particle size and narrow in distribution, no oxide layer is formed on the surface of the bismuth nanoparticles, the bismuth nanoparticles can be uniformly deposited on the surface of carbon nitride, and more catalytic active sites are provided for a photocatalytic reaction; and the composite material is used for removing antibiotics in water, and has the advantages of high degradation efficiency, thorough degradation and good environmental water matrix resistance and biological safety.

Description

technical field [0001] The invention relates to the technical field of wastewater treatment, in particular to a metal bismuth nanoparticle modified porous carbon nitride composite material, a preparation method thereof and an application in removing antibiotics in water. Background technique [0002] In the past few decades, antibiotics have been widely used in the treatment of human and aquaculture anti-infective diseases. Since antibiotics cannot be completely metabolized, most of the used antibiotics are excreted in the form of the original drug or its metabolites. Wastewater contains high concentrations of antibiotics, which are the main source of antibiotics in environmental water. Antibiotic residues in environmental water can lead to drug resistance of pathogenic microorganisms, produce and spread drug resistance genes, and pose a great threat to human life and health and the ecological environment. Emerging pollutants, the removal of antibiotics in water has become a...

Claims

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Application Information

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IPC IPC(8): B01J27/24B01J23/18B82Y30/00B82Y40/00C02F1/28C02F1/30C02F101/30C02F101/34C02F101/38
CPCB01J27/24B01J23/18B82Y30/00B82Y40/00C02F1/30C02F1/281C02F2101/30C02F2101/34C02F2101/38C02F2305/10B01J35/394B01J35/23B01J35/39Y02W10/37
Inventor 贾冬玲张宜凡张雪冯培莹潘洪志
Owner SHANGHAI UNIV OF MEDICINE & HEALTH SCI
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