Preparation method of two-dimensional ultrathin bismuth oxyhalide solid solution nanosheet photocatalyst

Abstract

The invention discloses a preparation method of a two-dimensional ultrathin bismuth oxyhalide solid solution nanosheet photocatalyst and belongs to the technical field of photocatalysis. The method comprises the steps as follows: inorganic bismuth salt and a dispersant are added to deionized water, a structure-directing agent is added, the mixture is stirred, and a solution A is formed; halide isdissolved in deionized water and dropwise added to the solution A, the mixture is stirred continuously and poured into a hydrothermal synthesis reaction kettle to react, cooling, centrifugal separation, precipitation, water washing and drying are performed, and the ultrathin bismuth oxyhalide solid solution nanosheet photocatalyst is obtained. The preparation method has the advantages as follows:the thickness of the formed bismuth oxyhalide solid solution nanosheet is regulated by the added structure-directing agent and dispersant, the ultrathin bismuth oxyhalide solid solution nanosheet is synthesized with a hydrothermal method, the photocatalytic activity is further improved, and the prepared ultrathin bismuth oxyhalide solid solution photocatalyst has efficient visible-light catalyticactivity. The method has mild reaction conditions, required equipment is simple, required agents are low in price, safe and non-toxic, and the method is suitable for mass production.

Description

technical field

[0001] The invention belongs to the technical field of photocatalysis, and in particular relates to a preparation method of a two-dimensional ultrathin bismuth oxyhalide solid solution nanosheet photocatalyst. Background technique

[0002] With the development of modern industry and agriculture, a large number of toxic, harmful and refractory organic pollutants (such as chlorophenols, pesticides, endocrine disruptors, etc.) have entered the water environment, threatening human health and survival. And this kind of substance is difficult to remove and degrade in the conventional water treatment process. For such pollutants, semiconductor photocatalytic oxidation technology, as an economical, safe and efficient advanced oxidation technology, has attracted extensive attention from researchers. This technology can oxidize organic pollutants in the water environment and eventually It is degraded into safe and non-toxic small molecular substances such as carbon di...

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