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Modified copper bismuthate photocatalyst and preparation method thereof

A photocatalyst, copper bismuth acid technology, applied in the field of photocatalysis, can solve the problems of high equipment requirements, weakened acidity, harsh reaction conditions, etc., and achieve the effect of good visible light response performance, low cost, and simple preparation method

Active Publication Date: 2016-01-13
泳锌高新技术有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Among them, the solid-state grinding method and the ion exchange method have the disadvantages of harsh reaction conditions and complicated preparation procedures; the hydrothermal method has the disadvantages of long preparation period and high equipment requirements.
Bismuth nitrate needs to be dissolved under strong acidic conditions, and during the stirring process of the conventional sol-gel method, the acidic substance will volatilize and cause the acidity to weaken, so that the sol will form a precipitate when the gel is not formed, preventing the reaction. proceed further
At present, there is no report on the preparation of copper bismuthate photocatalytic materials by sol-gel method

Method used

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  • Modified copper bismuthate photocatalyst and preparation method thereof
  • Modified copper bismuthate photocatalyst and preparation method thereof
  • Modified copper bismuthate photocatalyst and preparation method thereof

Examples

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Effect test

Embodiment 1

[0023] A modified copper bismuthate photocatalyst is provided, the modified copper bismuthate photocatalyst is a modified copper bismuthate photocatalyst doped with metal aluminum, and the modified copper bismuthate photocatalyst can be loaded on a cordierite honeycomb on a ceramic sheet.

Embodiment 2

[0025] Provide a kind of preparation method of modified copper bismuth acid photocatalyst, comprising the steps of:

[0026] (1) According to the volume ratio of 3:2:1:1, take 60ml of acetone, 40ml of glycerol, 20ml of nitric acid and 20ml of anhydrous acetic acid, stir evenly to obtain a clear and transparent solution;

[0027] (2) According to stoichiometry, that is, the ratio of substances is 1:1.9:0.1, 4.832g of copper nitrate trihydrate, 18.918g of bismuth nitrate pentahydrate and 0.375g of aluminum nitrate nonahydrate were added to the clear and transparent solution. Stir until a pale yellow gel is formed;

[0028] (3) Take out the yellow gel and place it in an oven at 140°C for half an hour to obtain a dried gel;

[0029] (4) The dried gel obtained in step (3) was placed in a muffle furnace and calcined at 500° C. for 3 hours to obtain a modified copper bismuthate photocatalyst sample.

[0030] Provide a kind of modified bismuth acid copper photocatalyst-supported hon...

Embodiment 3

[0037] (1) Characterization of modified copper bismuthate photocatalyst

[0038] see figure 1 , the diffraction peaks of the modified copper bismuthate photocatalyst sample prepared at 500 °C are basically the same as the standard characteristic diffraction peaks of copper bismuthate, indicating that the modified copper bismuthate photocatalyst material prepared by this method has a crystal structure of spinel ; There are miscellaneous peaks near the main peak, indicating that aluminum ions have been doped into the copper bismuth acid photocatalyst. see figure 2 , the modified copper bismuthate photocatalyst sample has good light absorption ability in the near ultraviolet and visible light regions, which is much higher than the common titanium dioxide P25 photocatalytic material, and the improved copper bismuthate photocatalyst has obvious ion resonance phenomenon near 400nm , is due to the introduction of impurity element aluminum.

[0039] (2) Photocatalytic activity of ...

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Abstract

The invention discloses a modified copper bismuthate photocatalyst and a preparation method thereof. The modified copper bismuthate photocatalyst is doped with metal aluminum. The preparation process comprises the following steps: adding copper nitrate trihydrate, bismuth nitrate pentahydrate and aluminum nitrate nonahydrate into a mixed solution of acetone, glycerol, nitric acid and ethanoic anhydride, carrying out stirring so as to obtain yellow gel, drying the yellow gel so as to obtain dried gel, and calcining the dried gel so as to obtain the modified copper bismuthate photocatalyst. According to the invention, through the above-mentioned manner, the preparation method is simple; cost is low; the problem of incapability of preparation of bismuth photocatalytic materials by using a sol-gel method is solved; and the prepared honeycomb ceramic loaded modified copper bismuthate photocatalyst has good visible-light response performance and is capable of decomposing various pollutants under irradiation of visible light.

Description

technical field [0001] The invention relates to the field of photocatalysis, in particular to a modified copper bismuthate photocatalyst and a preparation method thereof. Background technique [0002] Visible light-responsive photocatalytic materials can undergo photodegradation reactions under the action of sunlight, and the active groups generated can remove pollutants. In bismuth-based photocatalytic materials, Bi loses 3 electrons, and the 6s of Bi 2 Orbital due to O 2p Partial overlapping of orbitals forms the top of the valence band in the semiconductor, which reduces the forbidden band width to achieve a good response to visible light wavelengths, and effectively increases the width of the valence band, which is conducive to improving the mobility of holes and reducing the photogenerated current. compound of sons. Copper bismuthate, a common bismuth-based photocatalyst with spinel structure, has no significant photocatalytic activity in the visible light region due...

Claims

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Application Information

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IPC IPC(8): B01J23/843C02F1/30
Inventor 夏加庚张纪文
Owner 泳锌高新技术有限公司
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