A method for in-situ growth of defective cuprous sulfide nanoparticles on carbon nitride nanosheets

A cuprous sulfide and nanoparticle technology, applied in the field of photocatalysis, can solve the problems of restriction, high price, waste, etc., and achieve the effects of strong operability, mild reaction conditions, and simple preparation process

Active Publication Date: 2022-02-25
EAST CHINA UNIV OF SCI & TECH
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Problems solved by technology

However, in sunlight, the light energy in the visible and ultraviolet regions only accounts for about 50%, and the remaining energy in the near-infrared region is directly wasted because it cannot be used, and the promotion of noble metal modification methods is also limited by the high price of the material itself. Constrained by

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  • A method for in-situ growth of defective cuprous sulfide nanoparticles on carbon nitride nanosheets
  • A method for in-situ growth of defective cuprous sulfide nanoparticles on carbon nitride nanosheets
  • A method for in-situ growth of defective cuprous sulfide nanoparticles on carbon nitride nanosheets

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Embodiment 1

[0034] Preparation of blank carbon nitride

[0035] Take a certain amount of dicyandiamide and place it in a porcelain ark, cover it, and put it in a muffle furnace for calcination. The temperature was raised to 550°C at a rate of 3°C / min, and kept at this temperature for 4 hours. After it was naturally cooled to room temperature, it was ground, washed and dried to obtain CN.

Embodiment 2

[0037] Accurately weigh 2g of dicyandiamide (C 2 h 4 N 4) In a mortar, add 10 g of ammonium chloride (NH 4 Cl), fully grind to mix the two evenly, then transfer the ground medicine to a porcelain boat and put it into a muffle furnace for calcination, heat up to 550°C at a rate of 3°C / min, and keep at this temperature for 4h. After the calcination process, it was naturally cooled to room temperature, and the porcelain ark was taken out to obtain a light yellow carbon nitride nanosheet sample. The sample was fully ground and stored for later use. The obtained sample was marked as CNNs.

Embodiment 3-5

[0039]Disperse 64mg of sulfur powder in 12ml of oleylamine dispersion, marked as A; disperse 100mg of copper acetylacetonate in 20ml of chloroform dispersion, marked as B; accurately weigh 1g of carbon nitride nanosheets prepared in Example 2 (CNNs) was dispersed into a mixed solution of 20ml chloroform and 18ml oleylamine, marked as C, and the solution C was transferred to a 50mL round bottom flask and placed in an oil bath, slowly heated and stirred in a 70°C oil bath for 20min, Then add 120 μL, 480 μL, and 960 μL of solution A, and stir for 20 minutes, then add 1 mL, 4 mL, and 8 mL of solution B in turn, and stir for 40 minutes. After cooling down to room temperature naturally, the solution was taken out, washed several times with deionized water, and dried to obtain photocatalyst samples. The three samples were theoretically grown in situ with mass fractions of 0.2%, 0.8%, and 1.6% Cu 2-x Cu of S nanoparticles 2-x For S / CNNs composites, the three samples are labeled CSCNN...

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Abstract

The present invention provides a method for in-situ growth of defective cuprous sulfide nanoparticles (Cu 2‑x S / CNNs) preparation method. In the method, firstly, the gas template and the carbon nitride precursor are mixed and ground by the gas template method, and then calcined in an inert atmosphere to obtain carbon nitride nanosheets. Sulfur source and copper source are sequentially dispersed and adsorbed on the surface of carbon nitride nanosheets under oil bath conditions, and then oil bath for a certain period of time, specific solvent environment and addition sequence make the defective cuprous sulfide nanoparticles on the carbon nitride nanosheets successfully. grow. The prepared composite photocatalyst has excellent photoelectric properties, and its application to the degradation of the antibiotic levofloxacin (LVX) shows a treatment effect far superior to that of bulk carbon nitride. And innovatively extend the light-absorbing edge of carbon nitride-based materials to the near-infrared region, and use long-wave light to degrade antibiotics. The material has a good application prospect in the field of pollution treatment.

Description

technical field [0001] The invention relates to a photocatalyst which can be used for efficiently degrading antibiotics and belongs to the technical field of photocatalysis. Background technique [0002] In recent years, the use and consumption of antibiotics has increased significantly. However, only 20-35% of antibiotic components can be absorbed and utilized by the human body, which means that most antibiotics are released into the environment through various means. For the treatment of antibiotics, some mainstream treatment methods are not effective at present, which leads to the continuous accumulation of toxic antibiotic substances in the environment, which seriously endangers human health. Among them, levofloxacin (LVX) is a third-generation fluoroquinolone antibiotic, which is widely used in medicine because of its excellent antibacterial activity. However, LVX has been continuously monitored in various environmental water bodies, and studies have shown that curren...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J27/24C02F1/30C02F101/38
CPCB01J35/004B01J27/24C02F1/30C02F2101/38C02F2305/10
Inventor 刘勇弟雷菊英周亮张金龙王灵芝刘志航
Owner EAST CHINA UNIV OF SCI & TECH
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