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Preparation method and application of oxygen-sulfur double-doped carbon nitride visible light catalytic material

A catalytic material, carbon sulfur nitride technology, applied in the field of water pollution control, can solve the problems of difficult degradation and slow degradation rate of microplastics in water, and achieve the effect of reducing accumulation and increasing degradation rate

Active Publication Date: 2022-03-29
OCEAN UNIV OF CHINA
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0007] The purpose of the present invention is to solve the above-mentioned existing research on microplastics in water that are difficult to degrade under natural conditions and have a slow degradation rate, and provide a catalytic material based on visible light response that can accelerate the photodegradation of microplastics in water. The application of the method in the treatment of microplastic pollution in water to make up for the deficiencies of the existing technology

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  • Preparation method and application of oxygen-sulfur double-doped carbon nitride visible light catalytic material
  • Preparation method and application of oxygen-sulfur double-doped carbon nitride visible light catalytic material
  • Preparation method and application of oxygen-sulfur double-doped carbon nitride visible light catalytic material

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Embodiment 1

[0036] Example 1- Preparation of Oxygen-Sulphur Double-doped Carbon Nitride Visible Light Catalytic Material

[0037]Pre-mixing method to prepare sulfur-doped carbon nitride material: mix melamine and thiourea at a mass ratio of 1:10, weigh a certain amount of mixture and place it in a crucible, and use a tube furnace to fire sulfur-doped carbon nitride at high temperature Material, the temperature is set to about 550°C, and the firing time is set to 4h. During the firing process, nitrogen gas is continuously blown into the tube, and finally dark yellow lumps are obtained, which are then placed in a mortar and ground into powder to obtain sulfur-doped carbon nitride material;

[0038] (2) Preparation of oxygen-sulfur double-doped carbon nitride material by post-blending method: place the sulfur-doped carbon nitride material in a high-temperature reaction kettle, and add a 30% superfluidic acid with a mass fraction of about 1:100 according to the solid-liquid ratio. The hydrog...

Embodiment 2

[0039] The preparation of embodiment 2-carbon nitride material

[0040] Weigh a certain amount of melamine and place it in a crucible, and use a tube furnace to fire sulfur-doped carbon nitride material at high temperature. The temperature is set at about 550°C, and the firing time is set at 4 hours. During the firing process, nitrogen gas is continuously blown into the tube. , and finally obtain a light yellow lump, which is then placed in a mortar and ground into a powder to obtain a carbon nitride material.

Embodiment 3

[0041] The characterization of embodiment 3-embodiment 1 and embodiment 2 gained materials

[0042] Using FTIR spectrum and XPS, the obtained carbon nitride and the oxygen-sulfur doped carbon nitride of the present invention were respectively subjected to physical and chemical characterization. The characterization is as follows: by measuring the structure, surface functional groups, and chemical composition of carbon nitride and oxygen-sulfur doped carbon nitride, the changes in physical and chemical properties before and after modification are analyzed. The specific measurement methods are as follows:

[0043] Measured using a Fourier transform infrared spectrometer. Place the material evenly on the ATR chip with a spatula and start scanning. Instrument parameters: scanning area 4000-500cm -1 , 50 scans, resolution 4cm -1 . For test results, see the attached figure 1 , as shown in the figure, the oxygen-sulfur doped carbon nitride of the present invention is obviously d...

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Abstract

The invention discloses a preparation method of an oxygen-sulfur double-doped carbon nitride visible light catalytic material, a visible light catalytic material and a method for degrading micro-plastics in water, the preparation method comprises the following steps: (1) preparing sulfur-doped carbon nitride by using a pre-doping method: mixing melamine and thiourea according to a mass ratio of (1: 8)-(1: 12); sintering at a high temperature in a nitrogen atmosphere to obtain sulfur-doped carbon nitride; and (2) preparing oxygen-sulfur double-doped carbon nitride by using a post-doping method, namely mixing the sulfur-doped carbon nitride obtained in the step (1) with a hydrogen peroxide solution in a mass ratio of (1: 25)-(1: 35), and reacting at 140-160 DEG C for a certain time to obtain the oxygen-sulfur double-doped carbon nitride visible light catalytic material.

Description

technical field [0001] The invention belongs to the field of water pollution control, and in particular relates to a preparation method of an oxygen-sulfur double-doped carbon nitride visible light catalytic material, the visible light catalytic material and a method for using the visible light catalytic material to degrade microplastics in water. Background technique [0002] Plastic pollution, especially microplastics (MPs, particle size <5mm) pollution has been listed as one of the urgent scientific issues in the field of environmental ecology. In recent years, due to the imperfect waste management system and the low ability to dispose or recycle plastics, the plastic waste in the environment has increased rapidly. The plastic waste is broken and cracked in the natural environment to produce a large amount of microplastics, which seriously threatens the safety of the ecosystem and human beings. Marine life health. Microplastics have been detected in various water bodi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J27/24B01J35/00C02F1/30C02F101/30
CPCB01J27/24C02F1/30C02F2305/10C02F2101/30B01J35/39Y02W30/62
Inventor 李锋民罗雅丹郑浩郑宇李璇
Owner OCEAN UNIV OF CHINA
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