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

A technology of bismuth oxyhalide and photocatalyst, which is applied in the field of photocatalysis, can solve the problems of low photocatalytic efficiency, achieve good activity, simple equipment, and small thickness

Inactive Publication Date: 2018-02-09
HARBIN INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, when bismuth oxyhalide is used as a photocatalyst, there is a shortcoming that the photogenerated electron-hole pairs are easy to recombine; and the bismuth oxyhalide with a single structure cannot have good visible light absorption ability and comparative Strong redox ability, resulting in low photocatalytic efficiency

Method used

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

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specific Embodiment approach 1

[0022] Specific embodiment one: what this embodiment records is a kind of preparation method of two-dimensional ultra-thin bismuth oxyhalide solid solution nanosheet photocatalyst, and the specific steps of the method are as follows:

[0023] Step 1: Add inorganic bismuth salt and 0.1 g~0.6 g dispersant in 5~30 mL deionized water, do not stir during the addition process to avoid hydrolysis of bismuth salt, then add 5~30 mL structure directing agent, stir for 30~60 min to form Uniform and transparent A solution;

[0024] Step 2: Dissolve the halide in 5mL deionized water to obtain a halide solution, then add all the obtained halide solution dropwise into solution A, continue stirring for 10~30min, and then pour into 100mL polytetrafluoroethylene In a lined stainless steel hydrothermal synthesis reactor, react at 100-200°C for 3-24 hours, and cool naturally to room temperature;

[0025] Step 3: Centrifuge the product obtained in Step 2 at 10,000r / min for 3 minutes, then wash th...

specific Embodiment approach 2

[0026] Embodiment 2: In the preparation method of a two-dimensional ultrathin bismuth oxyhalide solid solution nanosheet photocatalyst described in Embodiment 1, in step 1, the inorganic bismuth salt is bismuth nitrate or bismuth chloride.

specific Embodiment approach 3

[0027] Specific embodiment three: the preparation method of a kind of two-dimensional ultrathin bismuth oxyhalide solid solution nanosheet photocatalyst described in specific embodiment one or two, in step two, described halide is chloride, bromide or iodide One or more of them, wherein the chloride is sodium chloride or potassium chloride, the bromide is sodium bromide or potassium bromide, and the iodide is sodium iodide or potassium iodide.

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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...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J27/08B01J27/10C02F1/30C02F101/30
CPCC02F1/30B01J27/08B01J27/10C02F2305/10C02F2101/308B01J35/40B01J35/39
Inventor 王威王俏崔福义
Owner HARBIN INST OF TECH
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