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A composite photocatalyst for rapidly and efficiently degrading rhodamine b and its preparation method

A technology of composite light and catalyst, which is applied in the direction of catalyst activation/preparation, chemical instruments and methods, physical/chemical process catalysts, etc., can solve the problems of long dye degradation time and low degradation efficiency, and achieve strong visible light response ability and good application Prospects, Effects of Mild Reaction Conditions

Active Publication Date: 2019-01-01
NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] Aiming at the problems of long time and low degradation efficiency of photocatalytic materials on organic pollutant dyes, the present invention proposes a composite catalyst synthesis method capable of rapidly and efficiently degrading rhodamine B dyes, and the photocatalytic materials prepared by this method can realize organic matter Fast and efficient degradation

Method used

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  • A composite photocatalyst for rapidly and efficiently degrading rhodamine b and its preparation method
  • A composite photocatalyst for rapidly and efficiently degrading rhodamine b and its preparation method
  • A composite photocatalyst for rapidly and efficiently degrading rhodamine b and its preparation method

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Embodiment 1

[0027] Weigh 0.72g of molybdenum powder, add 35mL of deionized water to a beaker, stir magnetically for 10min, then add 10mL of 30%wt H 2 o 2 After continuing to stir for 15 min, a light yellow solution A was obtained. Transfer the solution A to the polytetrafluoroethylene liner of the stainless steel reactor, and keep it warm at 180°C for 12h. The product obtained after the hydrothermal reaction was separated by filtration, washed twice with deionized water and absolute ethanol respectively, and dried in an oven at 70°C to prepare molybdenum trioxide nanobelts. Weigh 0.5 g of the prepared molybdenum trioxide and place it in a beaker, add 80 mL of absolute ethanol, add 12 mL of 0.1 M sodium bromide solution dropwise after magnetic stirring for 10 min, and obtain solution B after ultrasonication for 15 min; 12 mL of silver nitrate solution with a concentration of 0.1 M was slowly dropped into B dropwise, and magnetic stirring was continued for 12 h in a dark state. The stirr...

Embodiment 2

[0034] Weigh 0.72g of molybdenum powder and place it in a beaker, add 35mL of deionized water, stir magnetically for 10min, then add 10mL of 30%wt H 2 o 2Stirring was continued for 15 min to obtain light yellow solution A. Transfer the solution A to the polytetrafluoroethylene liner of the stainless steel reactor, and keep it warm at 180°C for 10h. After the hydrothermal reaction, the product was separated by filtration, washed twice with deionized water and absolute ethanol, and dried in an oven at 70°C to prepare molybdenum trioxide nanobelts. Weigh 0.5 g of the prepared molybdenum trioxide and place it in a beaker, add 80 mL of absolute ethanol, add 12 mL of 0.1 M sodium bromide solution dropwise after magnetic stirring for 10 min, and obtain solution B after ultrasonication for 15 min; 12 mL of silver nitrate solution with a concentration of 0.1 M was slowly added dropwise into solution B, and magnetic stirring was continued for 12 h in the dark. The stirred solution wa...

Embodiment 3

[0036] Weigh 0.72g of molybdenum powder and place it in a beaker, add 35mL of deionized water, stir magnetically for 10min, then add 10mL of 30%wt H 2 o 2 Stirring was continued for 15 min to obtain light yellow solution A. Transfer the solution A to the polytetrafluoroethylene liner of the stainless steel reactor, and keep it warm at 160°C for 12h. After the hydrothermal reaction, the product was separated by filtration, washed twice with deionized water and absolute ethanol, and dried in an oven at 70°C to prepare molybdenum trioxide nanobelts. Weigh 0.5 g of prepared molybdenum trioxide, add 80 mL of absolute ethanol to a beaker, add 12 mL of 0.1 M sodium bromide solution dropwise after magnetic stirring for 10 min, and obtain solution B after ultrasonication for 15 min; 12 mL of silver nitrate solution with a concentration of 0.1 M was slowly dropped into B dropwise, and magnetic stirring was continued for 12 h in a dark state. The stirred solution was separated by filt...

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Abstract

The invention relates to a composite photocatalyst that can quickly and efficiently degrade rhodamine B and its preparation method. It uses molybdenum trioxide nanoribbons as the base and absolute ethanol as the solvent to synthesize AgBr / MoO3 composite materials through a deposition-sedimentation method. The reaction conditions are mild. , simple steps, green and environmentally friendly, easy to obtain raw materials, and easy for industrial production. The AgBr / MoO3 composite material prepared by this method is composed of strip-shaped molybdenum trioxide nanoribbons as the base and silver bromide nanoparticles attached to the surface. The AgBr / MoO3 photocatalytic material prepared by the method of the present invention can realize rapid and rapid conversion of organic matter. Efficient degradation.

Description

technical field [0001] The invention belongs to the fields of composite materials, photocatalytic technology and environmental water pollution control, and specifically relates to a composite photocatalyst for rapidly and efficiently degrading rhodamine B and a preparation method thereof. Background technique [0002] In recent years, the environmental pollution problems caused by the rapid economic development cannot be ignored. At present, traditional treatment methods such as activated carbon adsorption and natural precipitation are often used to deal with organic pollutants. Although these treatment technologies have been developed earlier, mature in technology and widely used, there are many problems such as low degradation efficiency, incomplete degradation or generation of secondary pollutants. Therefore, it is necessary to research and develop methods with higher efficiency and simpler operation in the treatment of industrial waste. Photocatalytic oxidation technolo...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J27/132B01J37/03C02F1/30C02F101/34C02F101/38
CPCC02F1/30B01J27/132B01J37/03C02F2101/38C02F2101/34C02F2305/10B01J35/39
Inventor 刘劲松冯冰
Owner NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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