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Flaky g-C3N4/ZIF-8/AgBr composite material for removing bisphenol A in water and preparation method of flaky g-C3N4/ZIF-8/AgBr composite material

A technology of ZIF-8 and composite materials, which is applied in the direction of catalyst activation/preparation, water/sludge/sewage treatment, organic compound/hydride/coordination complex catalysts, etc., which can solve the problem of unsatisfactory degradation effect of composite materials, etc. , to achieve the effects of shortening the required time, improving photocatalytic degradation efficiency, and high catalytic effect

Active Publication Date: 2020-11-27
CHANGZHOU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the present application found that ZIF-8 / g-C 3 N 4 When used to degrade and remove environmental estrogen bisphenol A, ZIF-8 / g-C 3 N 4 The degradation effect of composite materials is not ideal

Method used

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  • Flaky g-C3N4/ZIF-8/AgBr composite material for removing bisphenol A in water and preparation method of flaky g-C3N4/ZIF-8/AgBr composite material
  • Flaky g-C3N4/ZIF-8/AgBr composite material for removing bisphenol A in water and preparation method of flaky g-C3N4/ZIF-8/AgBr composite material
  • Flaky g-C3N4/ZIF-8/AgBr composite material for removing bisphenol A in water and preparation method of flaky g-C3N4/ZIF-8/AgBr composite material

Examples

Experimental program
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Effect test

Embodiment 1

[0031] (1) Preparation of g-C 3 N 4

[0032] Put melamine into an alumina crucible with a cover; heat it to 550°C in a muffle furnace at a rate of 5°C / min, and keep it at 550°C for 4 hours to obtain a yellow product;

[0033] Add 0.1 g of the product to 80 mL of concentrated H 2 SO 4 In, the protonated g-C 3 N 4 It is in the form of flakes, the specific surface area is increased, and hydronium ions are generated on the surface, which has strong oxidizing properties and can enhance the photocatalytic effect. It was stirred and sonicated for 8 h; g-C was collected by centrifugation 3 N 4 and washed several times with distilled water; the product was dried at 60°C for 24h to obtain the treated g-C 3 N 4 product.

[0034] (2) The general synthesis method of ZIF-8

[0035] A. Add 3g of Zn(NO 3 ) 2 ·6H 2 The 2-methylimidazole of 0 and 6.6g is added in the 200mL methanol solvent respectively;

[0036] B. The solution was vigorously stirred at room temperature for 1 h o...

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Abstract

The invention provides a flaky g-C3N4 / ZIF-8 / AgBr composite material for removing bisphenol A in water and a preparation method of the flaky g-C3N4 / ZIF-8 / AgBr composite material. According to the preparation method, an AgNO3 solution and a NaBr solution are added into a g-C3N4 / ZIF-8 solution which is subjected to ultrasonic uniform mixing, and the flaky g-C3N4 / ZIF-8 / AgBr composite material is prepared. By adding AgBr, on one hand, the forbidden band width of ZIF-8 can be narrowed, and on the other hand, part of AgBr can generate Ag elementary substances under irradiation of visible light to effectively capture photo-induced electrons, so that recombination of electron hole pairs is inhibited, and the photocatalytic degradation efficiency is greatly improved. X-ray diffraction and the like prove that the problem that pollutants in water are difficult to degrade by photocatalysis due to a wide energy gap band of an existing MOF material is solved. The material is novel, has the advantagesof high photocatalytic degradation efficiency, simple preparation method, good stability and the like, and can be used for degrading environmental hormone pollutants.

Description

Technical field: [0001] The invention belongs to the technical field of preparation of nanocomposite materials and environmental materials and their degradation of environmental pollutants, and relates to an ultrasonic-assisted deposition-precipitation method for preparing flake g-C 3 N 4 / ZF-8 / AgBr composite material and its properties. Background technique: [0002] Environmental estrogens are a large class of substances. It mainly includes pesticides (such as: NNJ), additives (such as: bisphenol A), heavy metals (such as: lead), polycyclic aromatic hydrocarbons, diphyllin, polychlorinated biphenyls, plant-derived estrogens And drugs (diethylstilbestrol), etc., in view of its far-reaching negative effects, environmental estrogen pollution and control have attracted great attention from developed countries. The current traditional treatment methods are not only ineffective, but also not environmentally friendly, and are likely to cause secondary pollution to the environm...

Claims

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Application Information

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IPC IPC(8): B01J31/22B01J31/26B01J37/34B01J37/03C02F1/30C02F101/34
CPCB01J31/1691B01J31/1815B01J31/26B01J37/343B01J37/031C02F1/30C02F2101/345C02F2305/10B01J2531/26B01J35/39
Inventor 冯胜郑玮吴唯段雪梅张跃
Owner CHANGZHOU UNIV
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