Magnetic-control dynamic ciliary bionic photocatalytic array and preparation method thereof

A ciliated, photocatalytic technology, applied in the field of photocatalysis, can solve the problems of reducing the catalytic activity of photocatalytic films, the limitation of photocatalytic reaction mass transfer, and the inability to degrade pollutants, so as to improve the absorption and utilization efficiency, improve the photocatalytic efficiency, The effect of high photocatalytic stability

Active Publication Date: 2014-02-05
NANJING UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Although this type of technology makes up for the problems of low surface area and low light energy utilization efficiency of photocatalytic films, in use, photocatalytic films are in a static state, and the mass transfer process of pollutants in the photocatalytic system depends on passive diffusion or External stirring, especially the mass transfer process in the nanometer range, is very weak, and photocatalytic rea

Method used

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  • Magnetic-control dynamic ciliary bionic photocatalytic array and preparation method thereof
  • Magnetic-control dynamic ciliary bionic photocatalytic array and preparation method thereof
  • Magnetic-control dynamic ciliary bionic photocatalytic array and preparation method thereof

Examples

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Embodiment 1

[0038] Add 0.15g of Co magnetic powder and 3g of silicone resin into 6.4g of solvent xylene, disperse with 180W ultrasonic for 5min, then disperse at 1500r / min for 60min, add 0.3g of hydroxyl hydrogen-containing silicone oil, and continue to disperse for 10min to obtain magnetic polymer suspension. The magnetic polymer suspension was injected into a 20×20×2mm polytetrafluoroethylene mold, and quickly placed in a uniform vertical magnetic field of 6000Gs, and cured at 60°C for 4 hours to obtain a 2mm cilia-like biomimetic array structure. Adjust the glow plasma voltage and current to 125V and 2A, respectively, to treat the sample for 5 minutes, and rinse it twice with absolute ethanol. Submerge the ciliated biomimetic array after plasma treatment in 0.02mg / mL carboxylated graphene aqueous solution, after soaking for 30s, pull out the array at a pulling speed of 6cm / min, place it in a vertical magnetic field of 15000Gs, and bake it at 70°C Dry, this process cycled 4 times to ob...

Embodiment 2

[0040] Add 0.12g of Fe magnetic powder and 3g of silicone resin into 6.4g of solvent xylene, and disperse with 150W ultrasonic for 5min. Then add, and then disperse at 1200r / min for 70min, then add 0.3g of hydroxyl hydrogen-containing silicone oil, and continue to disperse for 10min to obtain a magnetic polymer suspension. The magnetic polymer suspension was injected into a glass mold of 30×30×4mm, and quickly placed in a uniform vertical magnetic field of 10000Gs, and cured at 80°C for 4 hours to obtain a 4mm cilia-like biomimetic array structure. A 14W 180nm ultraviolet lamp was used to irradiate the biomimetic cilia-like array for 24h to carry out surface organic modification. The modified cilia-like biomimetic array was immersed in 0.04mg / mL carboxylated graphene aqueous solution. After soaking for 40s, the array was pulled out at a pulling speed of 3cm / min, placed in a vertical magnetic field of 17000Gs, and baked at 70°C. Dry, this process cycled 2 times to obtain the a...

Embodiment 3

[0042] Add 0.12g of Co magnetic powder and 3.5g of silicone resin into 7.0g of solvent xylene, and disperse with 200W ultrasonic for 8min. Then disperse at 1000r / min for 60min, add 0.3g of hydroxyl hydrogen-containing silicone oil, and continue to disperse for 10min to obtain a magnetic polymer suspension. The magnetic polymer suspension was injected into a 30×20×1mm polytetrafluoroethylene mold, and quickly placed in a uniform vertical magnetic field of 8000Gs, and cured at 70°C for 6 hours to obtain a cilia-like biomimetic array with a height of 1mm. Adjust the glow plasma voltage and current to 100V and 1.5A, respectively, to treat the sample for 10 minutes, and rinse it twice with absolute ethanol. Immerse the plasma-treated cilia-like biomimetic array in 0.01 mg / mL carboxylated graphene aqueous solution. After soaking for 20 s, the array was pulled out at a pulling speed of 2 cm / min, placed in a vertical magnetic field of 20000 Gs, and baked at 80 ° C. Dry, this process ...

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Abstract

The invention provides a magnetic-control dynamic ciliary bionic photocatalytic array and a preparation method thereof. The photocatalytic array can be flexibly bent and rotate under the action of a magnetic field. The preparation method comprises the steps: preparation of the ciliary bionic array, surface modification of the ciliary bionic array and further growth of photocatalytic substances. In a photocatalysis process, the magnetic field rotating at a high speed can drive the ciliary bionic photocatalytic array to carry out high-speed disturbance so as to realize effective and mixed mass transferring in a catalytic system, and due to a fluid shearing force generated by movement of the photocatalytic array, degradation products can be desorbed rapidly and the active positions of the catalytic substances can be exposed in time, so that the photocatalytic array can keep lasting photocatalytic activity. The magnetic-control dynamic ciliary bionic photocatalytic array provided by the invention can carry different photocatalytic substances and can play an important role in the fields of a micro-catalytic reactor and the like.

Description

technical field [0001] The invention relates to the field of photocatalysis, in particular to a magnetically controlled dynamic cilia-like bionic photocatalysis array and a preparation method thereof. Background technique [0002] In recent years, due to the increasingly serious energy and environmental problems worldwide, the use of photocatalytic degradation of pollution for environmental purification is considered to be an environmentally friendly, green and efficient new technology. Compared with the photocatalytic suspension system, the advantage of the photocatalytic thin film is that the photocatalyst is loaded on the carrier, and it can be reused without centrifugation or filtration separation after use. Therefore, the development and application of the photocatalytic thin film has more practical value. At the same time, a large number of studies have supported photocatalysts on substrates such as glass, metal and polymer films. However, there are problems of low sp...

Claims

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Application Information

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IPC IPC(8): B01J31/38B01J31/26B01J31/06B01J35/06C02F1/30
Inventor 陆春华许仲梓张敦谱倪亚茹彭枫萍王卫
Owner NANJING UNIV OF TECH
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