A kind of preparation method of heterostructure photocatalyst
A technology of photocatalyst and heterostructure, which is applied in the direction of chemical instruments and methods, physical/chemical process catalysts, metal/metal oxide/metal hydroxide catalysts, etc., which can solve cumbersome steps, small amount of obtained products, and high cost and other problems, to achieve the effect of simple preparation process, stable photocatalyst performance and large synthesis amount
Inactive Publication Date: 2015-12-30
YANGZHOU UNIV
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Problems solved by technology
Although the above mainstream methods have improved the photocatalytic performance of semiconductors to a certain extent, there are still problems such as cumbersome steps, small amount of products obtained, and high cost, which also limit the application in the industrial field.
[0004] sn 3 o 4 As a homologous series of tin-based oxides, because they belong to narrow bandgap semiconductors, and so far experimentally prepared SnO / Sn 3 o 4 Not yet reported
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[0019] 1. Preparation of heterostructure photocatalyst:
[0020] Choose NaOH powder (3.84g, 99.99%, Sigma-Aldrich), urea powder (3.2g, 99.999%, Sigma-Aldrich), SnCl 2 2H 2 O powder (1,808 g, 99.999%, Sigma-Aldrich) was dissolved in a mixed solution of 140 ml of deionized water and 60 ml of absolute ethanol. After stirring for 2 hours, the mixed solution was placed in a 200ml reactor, and hydrothermally reacted at 180°C for 18 hours; then the reactor was taken out and cooled rapidly under cold water for 0.5 hours, and then the resulting precipitate was alternately centrifuged with deionized water and absolute ethanol Washed, and the resulting product was dried at 60° C. for 12 hours, and finally the product was taken out.
[0021] 2. Verification:
[0022] Such as figure 1 , figure 2 , image 3 , Figure 4 As shown, adopt D8ADVANCE type XRD (Curadiation,?, Germany Bruker-AXS company) to determine the crystal phase structure of the prepared sample. Using Hitachi (Japan)...
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Abstract
The invention discloses a preparation method of a heterostructure photocatalyst and relates to the technical field of environmental protection and preparation of catalysts in the technical field of photocatalysis. The method comprises the following steps: dissolving NaOH, urea and SnCl2.2H2O in an ethanol water solution to form a mixed solution, and reacting under the condition that the temperature of the mixed solution is 180 DEG C; after the reaction is finished, cooling a mixing system to the normal temperature, alternately performing centrifugal washing on deposits by using de-ionized water and absolute ethanol, and drying. According to the method, two heterostructures, SnO and Sn3O4, are coexistent in a synthetic product, a hollow flower shape is formed, the specific surface area and a hollow pompon structure are relatively high, the light absorption efficiency is very high, the photocatalytic performance is high and stable, and the secondary pollution is avoided.
Description
technical field [0001] The invention relates to the technical field of environmental protection, and also relates to the technical field of catalyst preparation in the technical field of photocatalysis. Background technique [0002] With the continuous development of industry and agriculture, environmental problems such as water pollution have drawn widespread attention to the research and preparation of photodegradable pollutant materials. Tin oxide (SnO 2 (Eg=3.5eVatRT) and SnO(Eg=2.7eVatRT)) have been widely used in photocatalysis due to their mature preparation process and stable performance in alkaline and acidic solutions under light. But due to its SnO 2 And SnO is a wide bandgap semiconductor, which is limited to photocatalytic performance under ultraviolet light. Simply use SnO 2 And SnO as a photocatalyst is greatly limited in practical use. [0003] The mainstream methods to improve the photocatalytic performance of tin oxide compounds include: controlling th...
Claims
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IPC IPC(8): B01J23/14
Inventor 夏炜炜王海波曾祥华
Owner YANGZHOU UNIV