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Silver/silver iodide composite material modified with cadmium tungstate and its preparation method and application

A composite material, cadmium tungstate technology, applied in chemical instruments and methods, catalyst activation/preparation, water treatment of special compounds, etc., can solve the problems of unsatisfactory separation efficiency of photogenerated charges, complex synthesis method, high temperature required, etc., to achieve The effect of photogenerated charge conduction and separation is high, the absorption range is wide, and the absorption intensity is enhanced

Active Publication Date: 2020-03-27
HUNAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

So far, although various CdWO 4 Based photocatalytic materials, such as CdS / CdWO 4 , g−C 3 N 4 / CdWO 4 、CdWO 4 / Bi 2 o 2 CO 3 、C 3 N 4 / CdS / CdWO 4 、WO 3 / CdWO 4 etc. have been prepared, but the synthesis method of the above materials is complicated, the required temperature is high, the energy consumption is high, the production cost is high, and the separation efficiency of the photogenerated charge of the product is not ideal, which is difficult to meet the needs of industrial applications.

Method used

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  • Silver/silver iodide composite material modified with cadmium tungstate and its preparation method and application
  • Silver/silver iodide composite material modified with cadmium tungstate and its preparation method and application
  • Silver/silver iodide composite material modified with cadmium tungstate and its preparation method and application

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0049] A silver / silver iodide composite material modified with cadmium tungstate comprises cadmium tungstate and silver / silver iodide material, the silver / silver iodide material is supported on cadmium tungstate, and the silver / silver iodide material is composed of Ag nanoparticles and silver iodide.

[0050] In this embodiment, in the silver / silver iodide composite material modified by cadmium tungstate, the mass percentage of Ag nanoparticles is 1.2%, the mass percentage of silver iodide is 72.4%, and the mass percentage of cadmium tungstate is 26.4%. .

[0051] In this example, the specific surface area of ​​the silver / silver iodide composite material modified by cadmium tungstate is 3.42 m 2 / g, the average pore diameter is 6.44 nm, and the pore volume is 0.0096 cm 3 / g.

[0052] In this embodiment, the silver / silver iodide material is in the shape of random particles with a size of 200 nm to 800 nm; the cadmium tungstate is in the shape of regular nanorods with a length...

Embodiment 2

[0066] A silver / silver iodide composite material modified by cadmium tungstate, which is basically the same as the silver / silver iodide composite material modified by cadmium tungstate of Example 1, the difference being: the silver / silver iodide composite material modified by cadmium tungstate of embodiment 2 Among them, the mass percentage of Ag nanoparticles is 1.5%, the mass percentage of silver iodide is 90.3%, and the mass percentage of cadmium tungstate is 8.2%.

[0067] A kind of preparation method of the silver / silver iodide composite material modified by cadmium tungstate of the above-mentioned present embodiment is basically the same as the preparation method of the silver / silver iodide composite material modified by embodiment 1 cadmium tungstate, the difference is: embodiment 2 CdWO in step (2) 4 The dosage is 50 mg.

[0068] The silver / silver iodide composite (Ag@AgI / CdWO) modified by cadmium tungstate prepared in Example 2 4 ), denoted as AICW-1.

Embodiment 3

[0070] A silver / silver iodide composite material modified by cadmium tungstate, which is basically the same as the silver / silver iodide composite material modified by cadmium tungstate of Example 1, the difference being: the silver / silver iodide composite material modified by cadmium tungstate of embodiment 3 Among them, the mass percentage of Ag nanoparticles is 1.3%, the mass percentage of silver iodide is 83.4%, and the mass percentage of cadmium tungstate is 15.3%.

[0071] A kind of preparation method of the silver / silver iodide composite material modified by the cadmium tungstate of the above-mentioned present embodiment is basically the same as the preparation method of the silver / silver iodide composite material modified by the cadmium tungstate of embodiment 1, the difference is: embodiment 3 CdWO in step (2) 4 The dosage is 100 mg.

[0072] The silver / silver iodide composite (Ag@AgI / CdWO) modified by cadmium tungstate prepared in embodiment 3 4 ), denoted as AICW-2...

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Abstract

The invention dislcoses a cadmium trngstate-modified silver / silver iodide composite material, and a preparation method and application thereof. The composite material is prepared from cadmium trngstate and a silver / silver iodide material, wherein the silver / silver iodide material is loaded on the cadmium trngstate, and is formed by Ag nano-particles and silver iodide. The preparation method comprises preparation of silver iodide / cadmium trngstate and in situ photoreduction preparation of an Ag @ AgI / CdWO4 composite material. The composite material has the advantages of wide visible light absorption range, high absorption strength, high efficiency of photogenerated charge conduction and separation, good photocatalytic performance, high stability and photocorrosion resistance, and the like;the preparation method of the composite material has the advantages of easy control on reaction conditions, simple operation method, no use of any organic solvent, no secondary pollution, good environmental protection beneficit and the like; when the composite material is used for treating dye wastewater and antibiotic wastewater, the advantages of high removal rate, quick removal rate, convenientoperation, low cost, no secondary pollution, and the like are achieved.

Description

technical field [0001] The invention belongs to the field of material preparation and environmental protection, and relates to a silver / silver iodide composite material and its preparation method and application, in particular to a silver / silver iodide composite material modified with cadmium tungstate and its preparation method and application. Background technique [0002] With the development of the economy, energy and environmental issues have become increasingly prominent. Semiconductor photocatalysis technology is considered to be one of the most promising methods to solve environmental and energy problems because it can realize the conversion from solar energy to chemical energy. Traditional photocatalyst TiO 2 Due to its high UV photocatalytic activity, environmental friendliness and chemical stability, it is regarded as a photocatalytic material with good production capacity and application prospects for environmental remediation. However, due to TiO 2 The band ga...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J27/138B01J35/10B01J37/03B01J37/34B01J37/16C02F1/30C02F101/30C02F101/34C02F101/38C02F103/34
CPCB01J27/138B01J35/004B01J35/1009B01J35/1038B01J35/1061B01J37/031B01J37/16B01J37/343C02F1/30C02F2101/30C02F2101/308C02F2101/34C02F2101/38C02F2103/343C02F2305/10
Inventor 袁兴中吴志斌曾光明蒋龙波张进熊婷王侯夏琦于瀚博
Owner HUNAN UNIV
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