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Preparation method and application of photocatalytic material for visible light efficient degradation of tetrabromobisphenol A

A photocatalytic material, tetrabromobisphenol technology, applied in the field of environmental engineering, can solve the problems of low degradation efficiency, low spectral utilization rate, low debromination rate, etc.

Active Publication Date: 2022-07-22
DONGGUAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Visible light-driven degradation of tetrabromobisphenol A overheterostructured Ag / Bi 5 Nb 3 o 15 It is mentioned in the articles such as materials that photocatalysts can achieve the removal of TBBPA, but there are still problems such as low degradation efficiency, low debromination rate, low spectral utilization rate, high carrier recombination rate, incomplete detoxification and complex preparation process.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0014] Preparation method of CZB ternary heterojunction photocatalytic material:

[0015] Disperse 1 g of melamine, 1 g of cyanuric acid and 0.2 g of 2-aminobarbituric acid in 50 ml of deionized water, and stir for 2 hours until fully mixed. After drying the obtained mixed liquid at 60°C, it was put into a tube furnace at N 2 Calcined in the atmosphere, the temperature was controlled at 500 °C, and the reaction time was 3 h. After the reaction, it was cooled to room temperature and taken out, washed with deionized water and ethanol for 3 times, and then dried in an oven at 60 °C to obtain light yellow modified g-C 3 N 4 . Then select 400, 450, 550, 600 calcination temperature to prepare a series of modified g-C 3 N 4 (named modified g-C 3 N 4 -400, modified g-C 3 N 4 -450, modified g-C 3 N 4 -500, modified g-C 3 N 4 -550 and modified g-C 3 N 4 -600). Through transmission electron microscopy, diffuse reflectance spectroscopy, X-ray photoelectron spectroscopy, Fo...

Embodiment 2

[0019] Visible light degradation method of TBBPA: Weigh 0.02g of CZB heterojunction photocatalyst and disperse it into a photocatalytic reactor containing 100mL of TBBPA solution (10ppm). Before the degradation experiment, the reactor was stirred for 30 min under dark conditions to make the catalyst and TBBPA reach adsorption saturation. Subsequently, the photocatalytic degradation test under visible light conditions was carried out. The reaction time was 120 min and the reaction temperature was 25 °C. The taken-out reaction solution was filtered with a 0.22 μm filter membrane, and then 1 mL was taken for use, and the degradation rate was obtained after the instrument test.

[0020] The concentration of TBBPA was measured by ultra-high performance liquid chromatography, and the results showed that the degradation rate of TBBPA had reached more than 96% when the reaction was carried out for 50 min.

[0021] TBBPA degradation performance comparison test, under the same test cond...

Embodiment 3

[0023] Simulated sunlight degradation of TBBPA method: Weigh 0.02 g of CZB heterojunction photocatalyst and disperse it into a photocatalytic reactor containing 100 mL of TBBPA solution (10 ppm). Before the degradation experiment, the reactor was stirred for 30 min under dark conditions to make the catalyst and TBBPA reach adsorption saturation, and then the photocatalytic degradation test under simulated sunlight conditions was carried out. Once, the taken-out reaction solution was filtered with a 0.22 μm filter membrane, and then 1 mL was taken for use, and the degradation rate was obtained after the instrument test.

[0024] The concentration of TBBPA was measured by ultra-high performance liquid chromatography, and the results showed that the degradation rate of TBBPA had reached more than 95% when the reaction was 40 min.

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Abstract

The invention belongs to the technical field of environmental engineering, and provides a preparation method and application of a photocatalytic material for efficiently degrading tetrabromobisphenol A by visible light. C-coated ZnC, Bpn and g-C3N4 are used as precursors, and the g-C3N4 / C-coated ZnC / Bpn (CZB) ternary heterojunction photocatalytic material is constructed through a high-temperature calcination method. C-coated ZnC and Bpn are introduced into g-C3N4 containing N defects to construct a ternary heterojunction, so that the spectrum utilization rate and the conductivity can be improved, a band gap structure can be optimized, and relatively strong oxidation-reduction capability is generated. The migration capability of photon-generated carriers on the CZB is also enhanced, so that the recombination rate of the CZB is inhibited, and the photocatalytic degradation performance is improved. Under the visible light condition, the degradation rate of the prepared heterojunction material on TBBPA can reach 96% or above within 50 min. The ternary heterojunction photocatalyst is simple in preparation method, wide in raw material source, low in price and easy for large-scale production.

Description

technical field [0001] The invention belongs to the technical field of environmental engineering, and relates to the research on the preparation technology of zinc carbide, black phosphorus nanosheets and graphite phase carbon nitride ternary heterojunction photocatalytic materials, and in particular to the application of the materials to efficiently degrade tetrabromobis(tetrabromobisulfite) under visible light conditions. Innovation in the phenol A method. Background technique [0002] Tetrabromobisphenol A (TBBPA) is a commonly used brominated flame retardant, which can inhibit combustion and reduce the generation of thick smoke and toxic gases when added to organic synthetic materials. TBBPA is easy to settle and volatilize in the environment and can be transported through media such as water and air, making it a global pollutant. A large number of experiments have proved that TBBPA has liver and kidney toxicity, reproductive toxicity, embryo toxicity, neurotoxicity and...

Claims

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Application Information

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IPC IPC(8): B01J27/24C02F1/30C02F101/36
CPCB01J27/24C02F1/30C02F2305/10C02F2101/36B01J35/39Y02W10/37
Inventor 于明川刘聪周玉菲牛军峰
Owner DONGGUAN UNIV OF TECH
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