Ca-Bi-O series visible-light photocatalysis material and preparation method thereof

A photocatalytic material and visible light technology, applied in the direction of catalyst activation/preparation, chemical instruments and methods, physical/chemical process catalysts, etc., can solve the problem of high reaction temperature, achieve good repeatability, simple operation, and improve photocatalytic activity Effect

Inactive Publication Date: 2009-11-25
SHANDONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In view of the current research status, the present invention provides a series of Ca-Bi-O series visible light photocatalytic materials prepared through a uniform reaction by using a chemical solution method to overcome the defect of high reaction temperature in the prior art

Method used

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  • Ca-Bi-O series visible-light photocatalysis material and preparation method thereof
  • Ca-Bi-O series visible-light photocatalysis material and preparation method thereof
  • Ca-Bi-O series visible-light photocatalysis material and preparation method thereof

Examples

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Embodiment 1

[0034] Example 1: The preparation method of Ca-Bi-O visible light photocatalytic nanomaterials, the steps are as follows:

[0035] (1) Preparation of precursors

[0036] Weigh 0.24g Ca(NO 3 ) 2 and 0.97g Bi(NO 3 ) 3 Dissolve in 50mL of ethylene glycol, add 1mL of polymaleic acid dropwise, stir at room temperature for 5 minutes, adjust pH=9 with concentrated ammonia water, and stir at room temperature for 24 hours; wash the resulting product with 100mL of ethanol at room temperature, then centrifuge and separate Dry at 70°C for 24 hours to obtain a precursor.

[0037] (2) Annealing

[0038] Take 0.4g of the precursor prepared in step (1), pretreat at 300°C for 8 hours, and cool to room temperature naturally; grind for 20 minutes, anneal at 450-800°C for 10 hours, and cool to room temperature naturally to obtain Ca-Bi-O It is a photocatalytic functional material.

[0039] The reaction described in the steps (1) and (2) is to place the reaction kettle in an oven capable of...

Embodiment 2

[0045] The preparation steps are the same as in Example 1, and the difference is that the calcium salt used in step (1) is Ca(NO 3 ) 2 , the bismuth salt is BiCl 3 .

Embodiment 3

[0047] The preparation steps are the same as in Example 1, and the difference is that the calcium salt used in step (1) is CaCl 2 , the bismuth salt is: Bi(NO 3 ) 3 .

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Abstract

The invention relates to a preparation method for a Ca-Bi-O series visible-light photocatalysis material, and belongs to the technical field of inorganic nano materials. The preparation method comprises the steps of preparing a precursor by using a chemical solution method and annealing for 10 to 15 hours at the temperature of between 450 and 800 DEG C. The method for preparing the Ca-Bi-O series visible-light photocatalysis material by using the chemical solution method through even reaction overcomes the defect of high reaction temperature in the prior art, and can obtain single-phase or heterogenous compound photocatalysis functional materials by controlling the annealing temperature respectively. The method has the advantages of simple operation, easy reaction control and good repeatability; and the obtained heterogenous compound photocatalysis functional material has remarkably-improved photocatalysis activity.

Description

technical field [0001] The invention relates to a Ca-Bi-O series photocatalytic functional material and a preparation method thereof, belonging to the field of preparation of inorganic nanometer materials. Background technique [0002] Semiconductor photocatalytic oxidation technology is a new type of water treatment technology that uses light energy to degrade pollutants. It has the advantages of simple process, low cost, stable degradation structure under normal temperature and pressure, refractory organic matter, and no pollution. widespread concern of foreign scholars. Garey used TiO in 1976 2 Photocatalyst removed chlorine in polychlorinated biphenyls (Bull.Environ.Contam.Toxical., 1976, 16, 697.), Frank photocatalytic oxidation of CN in 1977 - for OCN - (J.Phys.Chem., 1977, 81, 1484.), pioneered the use of photocatalysts to treat sewage. The core of photocatalytic technology research is to find photocatalytic materials with excellent performance. Currently, the mo...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/18B01J37/00B01J37/03
Inventor 占金华王乐魏红伟
Owner SHANDONG UNIV
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