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g-C3N4 nanosheet/CdS composite visible-light-driven photocatalyst

A technology of g-c3n4 and nanosheets, applied in physical/chemical process catalysts, chemical instruments and methods, chemical/physical processes, etc., can solve the problem of low separation efficiency of photogenerated carriers, achieve good catalytic degradation effect, visible light High catalytic efficiency and easy availability of raw materials

Inactive Publication Date: 2014-05-14
FUZHOU UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] The object of the present invention is to provide a method to overcome block g-C 3 N 4 Two-dimensional ultrathin g-C with high visible light activity due to low separation efficiency of photogenerated carriers, suppression of CdS photocorrosion 3 N 4 Preparation method of nanosheet / CdS composite photocatalyst and its application in catalytic degradation of organic pollutants in water under visible light

Method used

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  • g-C3N4 nanosheet/CdS composite visible-light-driven photocatalyst
  • g-C3N4 nanosheet/CdS composite visible-light-driven photocatalyst
  • g-C3N4 nanosheet/CdS composite visible-light-driven photocatalyst

Examples

Experimental program
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Effect test

Embodiment 1

[0024] Example 1 Block g-C 3 N 4 Catalyst preparation

[0025] Weigh 10 grams of melamine into a corundum ark, place it in the middle of a tube furnace, heat it up to 550°C at a heating rate of 2°C / min, and keep it at 550°C for 4 hours. The whole process is carried out under a nitrogen atmosphere, and wait for natural cooling Then it was taken out and ground with a mortar to obtain a yellow powder sample.

Embodiment 2

[0026] Example 2 Two-dimensional ultra-thin g-C 3 N 4 Preparation of nanosheets

[0027] Weigh 0.4 grams of the sample in Example 1 and put it into a jar, add 80 milliliters of isopropanol, and tighten the bottle cap. Place the jar containing the sample in the ultrasonic machine for 10 hours to form a suspension, then centrifuge the suspension at 3000 rpm for 10 minutes to remove the sediment, and then centrifuge the upper suspension at 12000 rpm Minutes of high-speed centrifugation down to obtain light yellow solid samples.

Embodiment 3

[0029] The catalyst synthesized by the method of embodiment 1 and 2, after X-ray diffractometer scanning, see figure 1 , for g-C 3 N 4 .

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Abstract

The invention discloses a g-C3N4 nanosheet / CdS composite visible-light-driven photocatalyst and a preparing method and application thereof and belongs to the technical field of material preparation and photocatalysis. The catalyst is directly obtained with the solvothermal method by taking two-dimensional ultra-thin g-C3N4 nanosheets as the matrix, cadmium acetate dihydrate and thioacetamide as raw materials, and ethyl alcohol as the solvent. Compared with general block g-C3N4 / CdS, the two-dimensional ultra-thin g-C3N4 nanosheet / CdS composite photocatalyst prepared with the method has the advantages that the two substances are in tighter contact, the specific surface area is larger, photon-generated electron-hole can be better separated, and photocatalytic efficiency is higher. Under the shining of sunlight, the composite photocatalyst enables catalytic degradation of organic pollutants such as methyl orange in water to be achieved well. The preparing method is easy, raw materials are easy to obtain, visible light catalysis efficiency is high, and the application prospect is wide in the photocatalysis field.

Description

technical field [0001] The invention belongs to the technical field of material preparation and visible light photocatalysis, and specifically relates to a two-dimensional ultrathin g-C 3 N 4 Preparation of nanosheet / CdS composite visible light catalyst and its application in catalytic degradation of organic pollutants in water under visible light. Background technique [0002] Today's energy and environmental problems are becoming more and more serious, which has attracted extensive attention worldwide. Photocatalytic technology is a potential ideal way to solve the two problems of energy and environment. At present, the main reasons that restrict the application of photocatalysts in actual production are the low utilization rate of solar energy and the insufficient stability of photocatalysts so that they cannot be recycled. Therefore, in order to better utilize solar energy, the preparation of efficient and stable visible light catalysts has far-reaching significance ...

Claims

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Application Information

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IPC IPC(8): B01J27/24C02F1/30C02F101/38
Inventor 刘平卢美良戴文新付贤智裴增夏翁孙贤
Owner FUZHOU UNIV
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