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a kind of ag 8 w 4 o 8 /c 3 no 4 Preparation method and application of visible light catalytic composite material

A composite material and visible light technology, which is applied in the field of nanomaterials and photocatalytic materials, can solve the problems of unfavorable photocarrier separation and migration, and achieve the effects of short reaction time, uniform particles and good powder dispersion

Active Publication Date: 2021-06-29
SHENYANG POLYTECHNIC UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Doping semiconductor catalysts can achieve the response in the visible light range, but there are also disadvantages such as: the doped ions are always in a discrete state, which is not conducive to the separation and migration of photo-induced carriers
[0005] And so far there is no relevant Ag 8 W 4 o 8 with C 3 N 4 Reports of composites possessing photocatalytic effects under light

Method used

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  • a kind of ag <sub>8</sub> w <sub>4</sub> o <sub>8</sub> /c <sub>3</sub> no <sub>4</sub> Preparation method and application of visible light catalytic composite material
  • a kind of ag <sub>8</sub> w <sub>4</sub> o <sub>8</sub> /c <sub>3</sub> no <sub>4</sub> Preparation method and application of visible light catalytic composite material
  • a kind of ag <sub>8</sub> w <sub>4</sub> o <sub>8</sub> /c <sub>3</sub> no <sub>4</sub> Preparation method and application of visible light catalytic composite material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0039] a kind of Ag 8 W 4 o 8 / C 3 N 4 The preparation method of the visible light catalytic composite material comprises the following steps.

[0040] The molecular formula of the powder is (Ag 8 W 4 o 8 ) 1-x / (C 3 N 4 ) x , x=0, that is, the molecular formula is Ag 8 W 4 o 8 .

[0041] Step 1. Weigh 1mmol of silver nitrate, add it to 20ml of deionized water and 10mmol of trimethylammonium bromide (CTAB) solvent, and ultrasonically disperse the solution for about 10min until it is evenly mixed to obtain solution A.

[0042] Step 2. Mix 10 mmol of N,N-dimethylformamide with deionized water, pour it into the flask at the lower end of the Soxhlet extractor, stir for 30 min, and control the temperature of the oil domain at 60°C to obtain solution B.

[0043] Step 3. Weigh 0.5mmol of Na 2 WO 4 , add 10ml deionized water, slowly pour solution A and solution B into Na 2 WO 4 In the aqueous solution, stir for 1 hour, the speed of the magnetic stirrer is 500r / min, ...

Embodiment 2

[0046] a kind of Ag 8 W 4 o 8 / C 3 N 4 The preparation method of the visible light catalytic composite material comprises the following steps.

[0047] The molecular formula of the powder is (Ag 8 W 4 o 8 ) 1-x / (C 3 N 4 ) x , x=0.03.

[0048] Step 1. Put 10g of urea into a corundum crucible, heat up to 250°C at a rate of 3°C / min for sintering under nitrogen for 1 hour, then heat up to 600°C at a rate of 5°C / min under air, calcinate for 2 hours, and collect powder A. spare.

[0049] Step 2. Weigh 8mmol of silver nitrate, add it to 100ml of deionized water and 80mmol of trimethylammonium bromide (CTAB) solvent, and ultrasonically disperse the solution for about 20min until uniformly mixed to obtain solution B.

[0050] Step 3. Mix 80mmol of N,N-dimethylformamide with 200ml of ionic water, pour into the flask at the lower end of the Soxhlet extractor, stir for 40min, and control the temperature of the oil domain at 70°C to obtain solution C.

[0051] Step 4. Weigh ...

Embodiment 3

[0054] a kind of Ag 8 W 4 o 8 / C 3 N 4 The preparation method of the visible light catalytic composite material comprises the following steps.

[0055] The molecular formula of the powder is (Ag 8 W 4 o 8 ) 1-x / (C 3 N 4 ) x , x=0, 0.03, 0.04, 0.06, 0.09.

[0056] Step 1. Heat up 20g of urea at 3°C / min to 250°C for 1 hour under nitrogen, then heat up to 600°C at 5°C / min under air, and calcine for 3 hours. Collect powder A for later use.

[0057] Step 2. Weigh 8 (1-x) mmol silver nitrate, add it to 100ml of deionized water and 80 (1-x) mmol trimethylammonium bromide (CTAB) solvent, and ultrasonically disperse the solution Treat for about 30 minutes until the mixture is homogeneous to obtain solution B.

[0058] Step 3. Mix 80 (1-x) mmol of N,N-dimethylformamide with 200ml of ionic water, pour it into the flask at the lower end of the Soxhlet extractor, stir for 60min, and control the temperature of the oil domain at 80°C to obtain a solution c.

[0059] Step 4. W...

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Abstract

The invention discloses an Ag 8 W 4 o 8 / C 3 N 4 The preparation method and application of a visible light catalytic composite material belong to the technical field of nanometer material and photocatalytic material. Calcinate urea under certain conditions, then add it to the aqueous solution containing silver nitrate, sodium tungstate and active agent, filter after ultrasonic dispersion reaction, wash and dry the filter cake to obtain Ag 8 W 4 o 8 / C 3 N 4 Visible light-catalyzed composites. The material powder prepared by the method in the present invention is a petal-like lamellar hole with a thickness of only 30nm, has strong photocatalytic activity to rhodamine B and methylene blue, can be used for degradation and treatment of dyes, and can be used for existing water Pollution control provides new materials and ideas, and develops new performance.

Description

technical field [0001] The invention belongs to the technical field of nanomaterials and photocatalytic materials, in particular to a preparation method and application of noble metal composite visible light catalytic materials, specifically an Ag 8 W 4 o 8 / C 3 N 4 Preparation method and application of visible light catalytic composite material. Background technique [0002] The current situation of environmental pollution in my country is mainly manifested in: air pollution with sulfur dioxide and smoke emitted from coal combustion as the main pollutants; water pollution with organic matter in industrial wastewater discharge as the main pollutant; and ecological environment caused by soil erosion and vegetation destruction. destroy. In recent years, the pollution of water resources has gradually intensified, and the pollution of dye wastewater is the most harmful one. The discharge of industrial dye wastewater is large, and most dyes are aromatic organic compounds, wh...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J27/24C02F1/30
CPCB01J27/24B01J35/004C02F1/30C02F2305/10
Inventor 尤俊华赵耀郭耀祖曲迎东苏睿明李荣德
Owner SHENYANG POLYTECHNIC UNIV
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