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Double layer core-shell structure Ni-WO3 photocatalyst and application

A core-shell structure and photocatalyst technology, applied in the field of photocatalysis, can solve the problem of not finding a hollow double-layer core-shell structure, etc., and achieve the effects of simple and feasible preparation method, improved photocatalytic efficiency, and high catalytic efficiency.

Active Publication Date: 2014-02-19
LIAONING UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, no research on photocatalytic materials with hollow double-layer core-shell structure and its preparation has been found in domestic research.

Method used

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  • Double layer core-shell structure Ni-WO3 photocatalyst and application
  • Double layer core-shell structure Ni-WO3 photocatalyst and application
  • Double layer core-shell structure Ni-WO3 photocatalyst and application

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] Example 1 Double-layer core-shell structure Ni-WO 3 catalyst of light

[0028] Double-layer core-shell structure Ni-WO 3 The preparation method of photocatalyst is as follows:

[0029] (1) Preparation of PNS (surface nitrated PS spheres)

[0030] 1) Weigh 50.0g St (styrene), wash with NaOH solution (200g NaOH solution with 20.0g NaOH solid) for 3 times, and use about 50g NaOH solution for each washing, so as to wash away the polymerization inhibitor in St , the above-mentioned St washed with NaOH solution was washed twice with distilled water, and the water consumption for each washing was about 50g;

[0031] 2) Weigh 0.7g AIBN (azobisisobutyronitrile) and mix it with the washed St, and stir to dissolve;

[0032] 3) Weigh 5.4g of PVP(K-30) and 180g of anhydrous ethanol solution in a 500mL three-necked bottle, stir to dissolve, pour the St solution previously dissolved in AIBN into the three-necked bottle, stir mechanically, and introduce N 2 , after emptying, the ...

Embodiment 2

[0044] Example 2 Double-layer core-shell structure Ni-WO 3 catalyst of light

[0045] Double-layer core-shell structure Ni-WO 3 The preparation method of the photocatalyst is as follows: the dried PNS-Ni-WO 3 Put the ball product into an appropriate amount of dimethylformamide (DMF) to dissolve the organic matter inside the ball to obtain a double-layer core-shell structure Ni-WO 3 catalyst. Other steps are the same as in Example 1.

Embodiment 3

[0046] Example 3 Double-layer core-shell structure Ni-WO 3 Application of photocatalyst to degrade isopropanol

[0047] Ni-WO prepared by embodiment 1 3 The photocatalyst is used to catalyze the degradation of isopropanol. The reaction conditions are: 1μL of isopropanol liquid is vaporized in a glass container, and the gaseous isopropanol is catalytically degraded under a UV mercury lamp light source with a maximum power of 350W. The amount of catalyst used is 0.1g . Such as Figure 8 shown in Ni-WO 3 As a photocatalyst, the degradation rate of isopropanol is very high, degrading two-thirds of isopropanol within 80 minutes.

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Abstract

The present invention discloses a double layer core-shell structure Ni-WO3 photocatalyst, wherein the preparation method comprises: 1) adopting styrene as a monomer to prepare polystyrene beads, and carrying out a surface nitration treatment; 2) carrying out ultrasonic dispersion on the nitrated polystyrene beads with distilled water, adding to an ethylene glycol solution of NiSO4.6H2O in a dropwise manner under stirring, carrying out water bath to achieve a temperature of 50-80 DEG C, carrying out stirring absorption for 24 h, adjusting the PH value to 8-10, carrying out stirring heating on the solution to achieve a temperature of 100-160 DEG C, carrying out a condensation reflux reaction for 1-5 h, and separating the product PNS-Ni beads; 3) dissolving ammonium tungstate in ammonia water, mixing with the uniform PNS-Ni bead system, carrying out stirring dissolving, and carrying out continuous stirring heating to achieve a temperature of 50-100 DEG C until the water is completely evaporated to obtain the dried PNS-Ni-WO3 bead product; and 4) removing the core organic material to obtain the double layer core-shell structure Ni-WO3 photocatalyst. According to the invention, a wet chemistry method is adopted to prepare the sample so as to effectively control a size and other physical and chemical properties of the product, the preparation method has characteristics of simpleness, easy performing and low cost, and the photocatalyst has characteristics of safety, no toxicity, high catalysis efficiency and wide application.

Description

technical field [0001] The invention relates to a photocatalytic double-layer core-shell structure photocatalyst and its application, specifically to a kind of inner layer made of Ni and outer layer made of WO 3 The hollow core-shell structure photocatalyst of the invention belongs to the field of photocatalysis. Background technique [0002] Environmental degradation and fossil energy depletion are two major problems facing mankind in the 21st century. Environmental purification technology and the development of renewable energy utilization technology are the key to solving these two problems. Photocatalytic technology has shown great application prospects in purifying the environment and utilizing solar energy to develop renewable energy, so it has always been one of the hotspots of scientific and technological research. [0003] There is a forbidden band between the valence band and the conduction band of the semiconductor material. When light with photon energy higher ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/888A62D3/17A62D101/28
Inventor 丁睿范晓星
Owner LIAONING UNIVERSITY