Preparation and application of photocatalyst Ag/ AgBr

Abstract

The invention discloses preparation and application of a photocatalyst Ag / AgBr, and belongs to the technical field of nanocatalysts. According to the method, 1-butyl-3-methylimidazole bromine ([BMIM]Br) is prepared from N-methylimidazole and n-butyl bromide under certain conditions, wherein a preparation method comprises the steps that a certain amount of N-methylimidazole and a certain amount of n-butyl bromide are weighed and put into a round-bottom flask to be stirred and refluxed for a period of time in a high-temperature water bath to obtain faint yellow thick liquid, and 1-butyl-3-methylimidazole bromine ([BMIM]Br) which is collected after cooling has the very high catalytic activity in preparation of the photocatalyst Ag-AgBr by serving as a precursor.

Description

technical field [0001] The invention relates to the preparation and application of a photocatalyst Ag / AgBr, belonging to the technical field of nanometer catalysts. Background technique [0002] In recent years, ionic liquids have played a unique role in organic synthesis as a "green" solvent or catalyst. As an excellent solvent, ionic liquids provide an environment different from traditional molecular solvents for chemical reactions, which can change the reaction The mechanism has excellent activity and stability, high reaction selectivity and mass transfer capacity, and has the advantages of high homogeneous catalytic efficiency and heterogeneous catalytic separation and recovery. Therefore, the research reports on ionic liquids are increasing day by day. [0003] Photocatalytic technology has many advantages, such as clean and environmentally friendly, can effectively use solar energy, the catalyst is cheap and non-toxic, good stability, can be reused, the reaction requi...

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Problems solved by technology

[0004] He and others prepared 1-butyl-3-methylimidazolium bromide in 2009, only explored its structure and the properties of the material itself under reaction conditions, and did not further study (such as further synthesis and application)

And there are few reports on the preparation of AgBr based on ionic liquids at present, and there are also reports on the similar preparation of AgBr, using [C 16 mim]Br was used as a precursor and template, ethylene glycol was used as a solvent, and PVP was used as a stabilizer. AgBr was solvothermally synthesized, and methyl orange and rhodamine B were degraded.

However, the reported methods need to add solvents and stabilizers, etc., which not only increases the cost, but also is cumbersome to operate.

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