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
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[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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