Bismuthyl iodate nanosheet material and preparation method thereof

A technology of bismuth oxyiodate nanometer and sheet material, applied in the field of materials, can solve the problems of long reaction time, high temperature, uneven product structure, etc., and achieve the effects of short preparation time, improved utilization rate and regular product structure

Active Publication Date: 2019-09-03
PEKING UNIV SHENZHEN GRADUATE SCHOOL
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  • Application Information

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Problems solved by technology

[0004] The purpose of the present invention is to provide a preparation method of bismuth oxyiodate nanosheet material, aiming to solve the problem...

Method used

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  • Bismuthyl iodate nanosheet material and preparation method thereof
  • Bismuthyl iodate nanosheet material and preparation method thereof
  • Bismuthyl iodate nanosheet material and preparation method thereof

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[0024] Example of the present invention provides a kind of preparation method of bismuth oxyiodate nanosheet material, comprises the steps:

[0025] S01. Provide bismuth oxyiodide nanosheet materials;

[0026] S02. Place the bismuth oxyiodide nanosheet material in an ozone atmosphere to react for 3-20 hours; the volume content of ozone in the ozone atmosphere is 5%-80%.

[0027] Specifically, in the above step S01, a bismuth oxyiodide nanosheet material is provided, preferably, the bismuth oxyiodide nanosheet material is prepared by an electroplating method or a solvothermal method.

[0028] In a preferred embodiment of the present invention, the electroplating method is used to prepare bismuth oxyiodide nanosheet material, which specifically includes the following steps:

[0029] G01. Provide potassium iodide aqueous solution, add concentrated nitric acid, then add Bi(NO 3 ) 3 ·5H 2 O is dissolved to obtain the first solution;

[0030] G02. Provide a p-benzoquinone alcoh...

Embodiment 1

[0065] Preparation of bismuth oxyiodide nanosheets by electroplating and further preparation of bismuth oxyiodate nanosheets

[0066] Add 50mL water to dissolve 3.32g potassium iodide, add 50μL concentrated nitric acid, then add 0.97g Bi(NO 3 ) 3 ·5H 2 O is dissolved to obtain the first solution, which is an orange clear solution;

[0067] Dissolve 0.5g p-benzoquinone in 20mL absolute ethanol to obtain the second solution;

[0068] The first solution and the second solution were mixed, stirred for 5min, transferred to the electrolytic cell, under the three-electrode system, a constant potential of -0.1V (relative to the silver silver chloride reference electrode) was applied for 100 to 200s, and the constant potential was applied. The voltage is maintained for 100 to 200s, and electroplated on the pre-cleaned conductive substrate to obtain the bismuth oxyiodide nanosheet material.

[0069] The above-mentioned bismuth oxyiodide nanosheet material is put into a reaction chambe...

Embodiment 2

[0071] Preparation of bismuth oxyiodide nanosheets by solvothermal method and further preparation of bismuth oxyiodate nanosheet materials

[0072] 1mmol Bi(NO 3 ) 3 ·5H 2 O is dissolved in 20mL ethylene glycol to obtain the third solution;

[0073] 1mmol potassium iodide was dissolved in 20mL methanol to obtain the fourth solution;

[0074] The third solution and the fourth solution were mixed and stirred for 30 minutes, then transferred to a 50mL reaction kettle, and reacted at 180°C for 8h; then cooled to room temperature, centrifuged, washed with water and ethanol several times, and then dried to obtain the iodine The bismuth oxide nanosheet material is a 1.5 micron powder.

[0075] Put the above-mentioned bismuth oxyiodide nanosheet powder material into the reaction chamber, ensure that the ozone content in the ozone reactor is 5%-80%, adjust the oxidation reaction of the ozone generator for 10 hours, the reaction degree can be adjusted, and BiOI / BiOIO 3 Heterojunc...

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Abstract

The invention provides a bismuthyl iodate nanosheet material and a preparation method thereof. The method includes the steps of: providing a bismuth oxyiodide nanosheet material; and placing the bismuth oxyiodide nanosheet material in ozone atmosphere for reaction for 3-20h, with the ozone content of the ozone atmosphere being 5%-80%. In the reaction process, the I ion in bismuth oxyiodide crystalis oxidized to IO3<-> ion, and the morphology of bismuthyl iodate nanosheet remains unchanged, thus obtaining the bismuthyl iodate nanosheet material. The invention adopts gas phase oxidation method,because of the particularity of gas, no separation process is needed after reaction, and the bismuthyl iodate nanosheet material characterized by uniform size and regular product structure can be prepared directly from the bismuth oxyiodide nanosheet material; the reaction gas can be reutilized to improve the utilization rate; and the preparation time is short and the reaction temperature is low,therefore the method has better industrial application prospects.

Description

technical field [0001] The invention relates to the field of materials, in particular to a bismuth oxyiodate nanosheet material and a preparation method thereof. Background technique [0002] Photocatalysis or photoelectrocatalysis, as an efficient and green solar energy utilization method, has broad prospects in the application of photochemical synthesis of high value-added compounds, photo(electro)catalytic hydrogen production, and photocatalytic degradation of harmful pollutants in water. Most of its core catalysts use transition metal compounds, which are dispersed in solvents such as water or supported on different substrates for catalytic synthesis or degradation. Among them, bismuth-based two-dimensional layered semiconductors have attracted extensive attention due to their unique photoelectrochemical properties. Bismuth oxyiodate (BiOIO 3 ) as a polar semiconductor, which belongs to the orthorhombic crystal system, consists of positively charged (Bi 2 o 2 ) 2+ a...

Claims

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Application Information

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IPC IPC(8): C01B11/22
CPCC01B11/22C01P2002/72C01P2004/03
Inventor 杨世和肖爽邱伟涛
Owner PEKING UNIV SHENZHEN GRADUATE SCHOOL
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