An ag with visible light response 4 (geo 4 ) photocatalyst and its preparation method and application

A photocatalyst and visible light technology, applied in metal/metal oxide/metal hydroxide catalysts, physical/chemical process catalysts, chemical instruments and methods, etc., can solve the problems affecting the commercial prospects of organic pollutants, and achieve high commercial Chemical application prospects, simple conditions, mild reaction conditions

Active Publication Date: 2020-03-17
SHANDONG UNIV
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  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, due to the wide band gap of titanium dioxide, it only responds to ultraviolet light, which greatly affects its commercial prospects in the photodegradation of organic pollutants using solar energy.

Method used

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  • An ag with visible light response <sub>4</sub> (geo <sub>4</sub> ) photocatalyst and its preparation method and application
  • An ag with visible light response <sub>4</sub> (geo <sub>4</sub> ) photocatalyst and its preparation method and application
  • An ag with visible light response <sub>4</sub> (geo <sub>4</sub> ) photocatalyst and its preparation method and application

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preparation example Construction

[0030] In one embodiment of the present application, a Ag with visible light response is provided 4 (GeO 4 ) The preparation method of photocatalyst, step is as follows:

[0031] (1) In the stirring state, the sodium germanate solution is slowly added dropwise to the silver nitrate solution, and the stirring is continued to form a precursor solution;

[0032] (2) Move the precursor solution to the reaction kettle, and react at 110-130°C for 10-14h. After the reaction is completed, filter and dry to obtain Ag 4 (GeO 4 )catalyst of light.

[0033] As a preferred solution, in step (1), the concentration of the sodium germanate solution is 0.06-0.07 mol / L; preferably 0.0625 mol / L. The concentration of the silver nitrate solution is 0.2-0.3mol / L; preferably 0.25mol / L.

[0034] As a preferred scheme, in step (1), the volume ratio of sodium germanate solution and silver nitrate solution added is 1:1. The amount of sodium germanate and silver nitrate will affect the prepared Ag ...

Embodiment 1

[0045] Example 1: Ag 4 (GeO 4 ) Preparation of photocatalyst

[0046] Specific steps are as follows:

[0047] 2.5 mmol sodium germanate (Na 2 GeO 3 ) and 10 mmol silver nitrate were dissolved in 40 ml deionized water, respectively. In the stirring state, slowly drop the sodium germanate solution into the silver nitrate solution, and stir for half an hour to form a precursor solution. The obtained mixed solution was charged into a 100 ml polytetrafluoro reactor, and reacted at 120 degrees Celsius for 12 hours. After the reaction was completed, after natural cooling, the Ag was obtained by suction filtration and drying. 4 (GeO 4 )catalyst of light.

[0048] figure 1 Crystalline Ag prepared for this example 4 (GeO 4 ) X-ray diffraction pattern, by figure 1 It can be seen that after 12 hours of hydrothermal treatment, the product shows better crystallinity, and the composition is Ag 4 (GeO 4 ), and no obvious miscellaneous peaks appeared.

[0049] figure 2 Be the ...

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Abstract

The invention discloses a preparation method of an Ag4(GeO4) photocatalyst with a visible light response. The preparation method comprises the following steps: (1) in a stirring state, slowly dropping a sodium germinate solution into a silver nitrate solution, and continuously stirring, thus forming a precursor solution; (2) transferring the precursor solution into a reaction kettle, performing reaction under a condition of 110 to 130 DEG C for 10 to 14 hours, after the reaction is completed, and performing suction filtering and drying, thus obtaining the Ag4(GeO4) photocatalyst. The Ag4(GeO4) photocatalyst prepared through the preparation method disclosed by the invention has the visible light response; the prepared photocatalyst is relatively high in photocatalysis activity and is suitable for degrading organic pollutants and decomposing water to generate oxygen during actual application in the field of photocatalysis. An experimental research shows that an Ag4(GeO4) photocatalytic material is relatively high in photocatalysis performance and is used for photocatalytically decomposing water to generate oxygen; the prepared photocatalyst can decompose water to generate oxygen by 200 mumol / g under irradiation of visible light for 1 hour and can degrade 98 percent of a methylene blue organic dye within 20 minutes.

Description

technical field [0001] The invention relates to the technical field of preparation of photocatalytic materials, in particular to Ag with visible light response 4 (GeO 4 ) photocatalyst and its preparation method and application. Background technique [0002] The use of semiconductor photocatalysts to convert low-density solar energy that is difficult to collect into high-density and easy-to-use electrical and chemical energy has become one of the most active research fields in the world in recent years. Especially in the photocatalytic water splitting and the use of photooxidation to degrade pollutants to control the environment, it has attracted widespread attention from scientists all over the world. Therefore, extensive theoretical and experimental research on it will have very important strategic and practical significance. . [0003] Among all the problems currently restricting the practical application of photocatalytic technology, the most important is to improve t...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J23/66C02F1/30B01D53/86B01D53/72C02F101/30
CPCB01D53/8668B01J23/66B01J35/004C02F1/30C02F2101/308Y02W10/37
Inventor 秦晓燕朱相林黄柏标王朋张晓阳王泽岩刘媛媛张倩倩
Owner SHANDONG UNIV
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