A kind of modified bismuth acid copper photocatalyst and preparation method thereof

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

Active Publication Date: 2018-02-09
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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  • A kind of modified bismuth acid copper photocatalyst and preparation method thereof
  • A kind of modified bismuth acid copper photocatalyst and preparation method thereof
  • A kind of modified bismuth acid copper photocatalyst and preparation method thereof

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Effect test

Embodiment 1

[0021] Embodiment 1: provide a kind of modified copper bismuthate photocatalyst, described modified copper bismuthate photocatalyst is the modified copper bismuthate photocatalyst of metallic aluminum doping, can support described modified copper bismuthate photocatalyst on a cordierite honeycomb ceramic sheet.

Embodiment 2

[0022] Embodiment two: provide a kind of preparation method of modified copper bismuth acid photocatalyst,

[0023] Included steps are:

[0024] (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, and stir to obtain a clear and transparent solution;

[0025] (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 are added to the clear and transparent solution at 45°C Stir until a pale yellow gel is formed;

[0026] (3) Take out the yellow gel and place it in an oven for half an hour at 140°C to obtain a dry gel;

[0027] (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.

[0028] Provide a kind of modified bismuth acid copper photo...

Embodiment 3

[0035] (1) Characterization of modified copper bismuth acid photocatalyst

[0036] 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.

[0037] (2) Photocatalytic activity o...

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PUM

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Abstract

The invention discloses a modified copper bismuthate photocatalyst and a preparation method thereof. It is a modified copper bismuthate photocatalyst doped with metal aluminum. The preparation process is to prepare copper nitrate trihydrate, bismuth nitrate pentahydrate and nitric acid nonahydrate Add aluminum to the mixed solution of acetone, glycerol, nitric acid and anhydrous acetic acid, stir to obtain a yellow gel, dry the yellow gel to obtain a dried gel, and then calcinate the dried gel to obtain a modified copper bismuth acid photocatalyst . Through the above method, the preparation method of the present invention is simple and low in cost, and solves the problem that the bismuth-based photocatalytic material cannot be prepared by the sol-gel method. The prepared honeycomb ceramic-supported modified copper bismuth acid photocatalyst has good visible light response performance, and can be used in Various pollutants can be decomposed under the 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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Patent Type & Authority Patents(China)
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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