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Visible light response AgCl-Ag-Ag2CO3 composite photocatalyst, and preparation method and application thereof

A technology of catalyst and composite light, which is applied in the direction of chemical instruments and methods, physical/chemical process catalysts, chemical/physical processes, etc., can solve the problems of reduced photocatalytic activity and poor photostability, and achieves simple operation, low cost, and excellent performance. Effect of Visible Light Degradation Activity

Inactive Publication Date: 2014-02-19
NANJING UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

For example, Ag / AgCl plasma photocatalyst (C.An, S.Peng, Y.Sun, Adv.Mater.2010,22,2570-2574), Ag 3 PO 4 (Y. Bi, S. Ouyang, N. Umezawa, J. Cao, J. Ye, J. Am. Chem. Soc. 2011, 133, 6490-6492), Ag 2 CO 3 (H. Dong, G. Chen, J. Sun, C. Li, Y. Yu, D. Chen, Appl. Catal. B: Environ, 2013, 134-135, 46-54.), AgSbO 3 (J.Singh, S.Uma, J.Phys.Chem.C2009,113,12483-12488) and so on, they can effectively degrade organic pollutants under the irradiation of visible light, but the single Ag-based compound has poor photostability Defects, it is easy to decompose and generate elemental silver under light conditions, and the photocatalytic activity will decrease accordingly

Method used

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  • Visible light response AgCl-Ag-Ag2CO3 composite photocatalyst, and preparation method and application thereof
  • Visible light response AgCl-Ag-Ag2CO3 composite photocatalyst, and preparation method and application thereof
  • Visible light response AgCl-Ag-Ag2CO3 composite photocatalyst, and preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] Step 1, take 20ml of Changbaishan hot spring water and stir at room temperature;

[0021]Step 2, add 20 ml of 0.01 mol / L AgNO dropwise to the above solution with a constant pressure funnel 3 solution;

[0022] Step 3, after the dropwise addition, continue to stir for 1 hour to make the crystallization complete;

[0023] Step 4, the obtained product is centrifuged and washed with deionized water, and then dried to obtain AgCl-Ag-Ag 2 CO 3 .

[0024] AgCl-Ag-Ag 2 CO 3 The photocatalytic application of the composite photocatalyst is: 0.01 gram of AgCl-Ag-Ag 2 CO 3 The powder was dispersed in 20 ml of 10 mg / L methylene blue solution, and the methylene blue was photocatalytically degraded under visible light irradiation; the light source used was a 300W xenon lamp equipped with a 400nm filter.

[0025] The prepared AgCl-Ag-Ag 2 CO 3 The mass fraction of AgCl in the composite photocatalyst is 39%, the mass fraction of Ag is 14%, and the Ag 2 CO 3 The quality score...

Embodiment 2

[0028] Step 1, take 100ml of Changbai hot spring water and stir at room temperature;

[0029] Step 2, add 15 ml of 0.05 mol / L AgNO dropwise to the above solution with a constant pressure funnel 3 solution;

[0030] Step 3, after the dropwise addition, continue to stir for 1 hour to make the crystallization complete;

[0031] Step 4, the obtained product is centrifuged and washed with deionized water, and then dried to obtain AgCl-Ag-Ag 2 CO 3 .

[0032] AgCl-Ag-Ag 2 CO 3 The photocatalytic application of the composite photocatalyst is the same as in Example 1.

[0033] The prepared AgCl-Ag-Ag 2 CO 3 The mass fraction of AgCl in the composite photocatalyst is 60%, the mass fraction of Ag is 15%, and the Ag 2 CO 3 The mass fraction is 25%.

Embodiment 3

[0035] Step 1, take 50ml of Yunnan Atami hot spring water and stir at room temperature;

[0036] Step 2, add 15 ml of 0.1 mol / L AgNO dropwise to the above solution with a constant pressure funnel 3 solution;

[0037] Step 3, after the dropwise addition, continue to stir for 1 hour to make the crystallization complete;

[0038] Step 4, the obtained product is centrifuged and washed with deionized water, and then dried to obtain AgCl-Ag-Ag 2 CO 3 .

[0039] AgCl-Ag-Ag 2 CO 3 The photocatalytic application of the composite photocatalyst is the same as in Example 1.

[0040] The prepared AgCl-Ag-Ag 2 CO 3 The mass fraction of AgCl in the composite photocatalyst is 30%, the mass fraction of Ag is 5%, and the Ag 2 CO 3 The quality score is 65%.

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Abstract

The invention discloses a visible light response AgCl-Ag-Ag2CO3 composite photocatalyst, and a preparation method and application thereof. The composite photocatalyst is formed by compounding the following materials by mass percent: 30 to 60 percent of AgCl, 5 to 15 percent of Ag and 25 to 65 percent of Ag2CO3. The preparation method comprises the following steps: taking a certain volume of thermal spring water and stirring at the room temperature; slowly adding a certain volume of AgNO3 solution into the solution; after dropwise addition is finished, continuously stirring for 1 to 2 hours; centrifugally washing the obtained product by using deionized water; and drying to obtain the AgCl-Ag-Ag2CO3 composite photocatalyst. The method provided by the invention is simple in operating process and short in period; the used raw material thermal spring water is clean, cheap, distributed widely and low in cost; the synthesized AgCl-Ag-Ag2CO3 has high dispersibility. The AgCl-Ag-Ag2CO3 composition serves as a photocatalyst for degrading pollutants through photocatalysis, and the result shows that the AgCl-Ag-Ag2CO3 composite photocatalyst has excellent visible light degradation activity, can completely degrade methylene blue within 15 minutes, and has a good application prospect in the environmental protection fields of waste water treatment and the like.

Description

technical field [0001] The invention belongs to the technical field of functional materials, and the invention relates to a visible light responsive AgCl-Ag-Ag 2 CO 3 Composite photocatalyst and its preparation method and photocatalytic application. Background technique [0002] With the rapid development of human society and rapid economic growth, the energy consumption represented by oil and coal has doubled. my country's energy structure is facing the double pressure of economic development and environmental protection, and the environmental pollution problems brought about in the process of life and production also restrict the development of my country's national economy and new energy. In particular, the organic matter discharged in the process of industrial production is high in content, high in toxicity, difficult to degrade, easy to cause carcinogenicity and teratogenicity in animals and humans, and the control of organic pollutants has become one of the problems ...

Claims

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Application Information

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IPC IPC(8): B01J27/232A62D3/17A62D101/28
Inventor 姚霞喜刘孝恒
Owner NANJING UNIV OF SCI & TECH
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