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Bi5O7I nano sheet-shaped material, as well as preparation method and application thereof

A nano-sheet, hydrothermal reaction technology, applied in chemical instruments and methods, catalyst activation/preparation, inorganic chemistry, etc., can solve the problems that restrict the industrial application of semiconductor photocatalysis technology, the narrow wavelength of semiconductor light absorption, and the recombination of photogenerated carriers. The problem of high rate of degradation, to achieve the effect of good ability to degrade phenolic pollutants, simple preparation process and strong controllability

Inactive Publication Date: 2018-05-04
GUANGDONG POLYTECHNIC OF ENVIRONMENTAL PROTECTION ENG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, from the perspective of the utilization rate of sunlight, wide-bandgap semiconductor photocatalytic materials represented by titanium dioxide still have the following defects: First, the light absorption wavelength of the semiconductor is narrow, mainly in the ultraviolet region, and the efficiency of utilizing sunlight is low; The recombination rate of photogenerated carriers is very high, resulting in low quantum efficiency. These factors restrict the practical industrial application of semiconductor photocatalytic technology to a certain extent.

Method used

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  • Bi5O7I nano sheet-shaped material, as well as preparation method and application thereof
  • Bi5O7I nano sheet-shaped material, as well as preparation method and application thereof
  • Bi5O7I nano sheet-shaped material, as well as preparation method and application thereof

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preparation example Construction

[0018] A kind of Bi provided by the embodiment of the present invention 5 o 7 The preparation method of 1 nano sheet material, comprising:

[0019] Dissolve the bismuth-containing compound in ethylene glycol, then add iodized salt, stir well to dissolve. In the present invention, a bismuth-containing compound and an iodine salt are used as raw materials, and ethylene glycol is used as a reaction solvent. The bismuth-containing compound is not easy to be hydrolyzed in ethylene glycol, which is helpful for the reaction to proceed. In particular, the solvent of the present invention cannot contain water, which will affect the progress of the reaction and the formation of the product.

[0020] In order to make the reaction complete, the regular Bi 5 o 7 I material, in a preferred embodiment of the present invention, the molar ratio of the bismuth element in the bismuth-containing compound to the iodine element in the iodine salt is 1:1-2. Preferably, the mass ratio of the bi...

Embodiment 1

[0030] This embodiment provides a Bi 5 o 7 1 nano sheet material, mainly prepares by following method:

[0031] Dissolve 1.56g of bismuth nitrate pentahydrate in 66mL of ethylene glycol, then add 0.996g of potassium iodide, and fully stir to dissolve. The pH of the solution was adjusted to 10 with sodium hydroxide.

[0032] The mixed solution was transferred to a hydrothermal reaction kettle, and hydrothermally reacted at 150° C. for 6 h.

[0033] After the product was cooled to room temperature, the product was centrifuged and precipitated, and the precipitate was washed three times with deionized water and ethanol to obtain a yellow solid powder.

[0034] The solid powder was placed in an oven and dried at 60° C. for 12 hours. Fully grind the solid powder to get Bi5 o 7 1 nanosheet material.

Embodiment 2

[0036] This embodiment provides a Bi 5 o 7 1 nano sheet material, mainly prepares by following method:

[0037] Dissolve 0.73g of bismuth nitrate pentahydrate in 33mL of ethylene glycol, then add 0.498g of potassium iodide, and fully stir to dissolve. The pH of the solution was adjusted to 10 with sodium hydroxide.

[0038] The mixed solution was transferred to a hydrothermal reaction kettle, and hydrothermally reacted at 150° C. for 6 h.

[0039] After the product was cooled to room temperature, the product was centrifuged and precipitated, and the precipitate was washed three times with deionized water and ethanol to obtain a yellow solid powder.

[0040] The solid powder was placed in an oven and dried at 60° C. for 12 hours. Fully grind the solid powder to get Bi 5 o 7 1 nanosheet material.

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Abstract

The invention provides a Bi5O7I nano sheet-shaped material, as well as a preparation method and application thereof, and relates to the technical field of semiconductor photocatalytic materials. The preparation method comprises: dissolving a bismuth-containing compound and iodide salt in ethylene glycol, adjusting the pH of the solution to 8-10, and performing hydrothermal reaction. The method issimple in preparation process, low in cost, strong in controllability, and suitable for large-scale production. The Bi5O7I nano sheet-shaped material is prepared from the preparation method of the Bi5O7I nano sheet-shaped material, and has good visible light sensing capacity and phenolic pollutant degrading capacity.

Description

technical field [0001] The invention relates to the technical field of semiconductor photocatalytic materials, and in particular to a Bi 5 o 7 1 nanosheet material and its preparation method and application. Background technique [0002] At present, the seriousness of environmental pollution has become a direct threat to human existence, an urgent problem that cannot be ignored. Phenolic compounds refer to compounds in which the hydrogen atoms on the benzene ring in aromatic hydrocarbons are replaced by hydroxyl groups. The water solubility of phenolic compounds increases with the increase of the number of hydroxyl groups. Due to the formation of intermolecular hydrogen bonds, most phenolic compounds have a high boiling point, are difficult to volatilize, and can exist in soil, water and other environments for a long time. During the synthesis, extraction and use of phenolic compounds, some phenolic compounds are released into the environment, causing environmental pollut...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01G29/00B01J27/06B01J37/08
CPCB01J27/06B01J37/08C01G29/00C01P2002/72C01P2004/03C01P2004/20
Inventor 王克亮涂舜恒江婵张栖姚伟卿
Owner GUANGDONG POLYTECHNIC OF ENVIRONMENTAL PROTECTION ENG
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