Preparation method of nano-material with bismuth oxybromide loaded on cobalt nickel hydrotalcite surface

A surface loading, bismuth oxybromide technology, applied in chemical instruments and methods, water pollutants, other chemical processes, etc., to achieve the effect of simple and easy operation of the experimental process, good prospects for development, and high catalytic repeatability

Inactive Publication Date: 2016-01-06
HOHAI UNIV
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  • Preparation method of nano-material with bismuth oxybromide loaded on cobalt nickel hydrotalcite surface
  • Preparation method of nano-material with bismuth oxybromide loaded on cobalt nickel hydrotalcite surface
  • Preparation method of nano-material with bismuth oxybromide loaded on cobalt nickel hydrotalcite surface

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[0025] Cobalt-nickel hydrotalcite surface loaded bismuth oxybromide (BiOBr / Co-Ni-NO 3 LDHs) The preparation method of nano-photocatalytic materials includes the following steps:

[0026] (1) At room temperature, add cobalt chloride, nickel chloride and hexamethylene tetramine with a molar ratio of 2:1:18 to ultrapure water in sequence, fully dissolve them, and put them into a hydrothermal reactor. React at ℃ for 5h, after cooling, the product is separated by filtration, and washed with deionized water and ethanol, and finally dried at room temperature to obtain cobalt nickel hydroxide;

[0027] (2) At room temperature, weigh 0.372g of cobalt-nickel hydroxide into an eggplant-shaped bottle containing 200mL of acetonitrile and 13.34mmol of bromine water. First add bromine water and blow in nitrogen for 15 minutes, then wrap the bottle tightly. Do not leak air, and keep stirring for 24 hours, then centrifuge the product, clean it with a large amount of ethanol, and finally dry it at r...

Example Embodiment

[0031] Example 1

[0032] At room temperature, weigh 0.9517 g of cobalt chloride hexahydrate, 0.4754 g of nickel chloride hexahydrate, and 5.0468 g of hexamethylenetetramine into 400 mL of ultrapure water, and stir until completely dissolved. Divide it into 5 equal parts into a 100mL hydrothermal reactor, and react in an oven at 95°C for 5 hours. After cooling, the product was filtered and washed with deionized water and ethanol 3 times each, and dried at room temperature to obtain Co-Ni hydroxide.

Example Embodiment

[0033] Example 2

[0034] At room temperature, measure 0.69 mL of bromine water and dissolve it in an eggplant-shaped bottle, add 200 mL of acetonitrile and 0.372 g of Co-Ni hydroxide samples in sequence, and wrap the mouth of the bottle with plastic wrap. Then access N 2 15min, and continue to stir for 24h. The product was centrifuged and washed with a large amount of ethanol, and dried at room temperature to obtain Co-Ni-BrLDH.

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Abstract

The invention relates to a preparation method of a nano-material with bismuth oxybromide loaded on a cobalt nickel hydrotalcite surface. The method includes: taking Co-Ni-Br LDH as the precursor, slowly adding a mixed solution of bismuth nitrate and mannitol dropwise, conducting stirring in a 40DEG C oil bath pan for 1h, subjecting the product to centrifugal separation and performing cleaning with a lot of water and ethanol, and finally drying the product in a 60DEG C oven. According to the method, through scanning electron microscopy (SEM) observation on the prepared BiOBr-Co-Ni-No3 LDHs nano-material, BiOBr nanosheets are crosswise stacked on the cobalt nickel hydrotalcite sheet layer irregularly, so that dyes of different types can be efficiently degraded under ultraviolet light, also a phenol organic solution can also be degraded, and a good recycle rate can be achieved. The efficient photocatalytic property is attributed to that bismuth oxybromide and cobalt nickel hydrotalcite have the similar layered structure, and the heterojunction formed by loading of the two realizes effective separation and transfer of electrons and holes.

Description

technical field [0001] The present invention relates to a bismuth oxybromide (BiOBr / Co-Ni-NO 3 LDHs) nanomaterials preparation method and its photocatalytic degradation of different ion types of dyes and organic wastewater applications. Background technique [0002] In 1972, Fujishima and Honda published on the Nature magazine about TiO 2 The paper on the photo-splitting of water on electrodes marks the beginning of a new era of photocatalysis. However, with the increasing development of photocatalysis, it is also facing problems such as the easy recombination of photogenerated carriers in semiconductors and the band gap of semiconductors. [0003] Bismuth oxyhalide is a new type of material with excellent photocatalytic performance. Some studies have pointed out that BiOBr has better catalytic performance in bismuth oxyhalide series [YanhuiAo, HongTang, PeifangWang, ChaoWang, JunHou, JinQian, Synthesis, characterization and photocatalytic activity ofBiOBr– AC composite p...

Claims

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Application Information

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IPC IPC(8): C02F1/30C02F1/42C02F1/28B01J20/06B01J20/30C02F101/30C02F101/38C02F101/34
Inventor 敖燕辉王沛芳王丹丹王超侯俊
Owner HOHAI UNIV
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