Preparation method and applications of modified bismuth oxybromide nanometer material

A nano-material, bismuth oxybromide technology, applied in the field of photocatalysis, can solve the problems of chromium pollution, untimely treatment of waste liquid, etc., and achieve the effect of enhancing adsorption capacity, reducing recombination, and improving photocatalytic reduction.

Inactive Publication Date: 2019-04-02
TIANJIN UNIV
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Problems solved by technology

[0002] With the development of society and the progress of industry, chromium and its compounds have been widely used as important raw materials in metallurgy, electroplating, leather, paint, pigment, printing and dyeing, pharmaceutical and other industries, but due to excessive consumption during use And the untimely treatment of waste liquid makes the chromium pollution in water and soil serious

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  • Preparation method and applications of modified bismuth oxybromide nanometer material
  • Preparation method and applications of modified bismuth oxybromide nanometer material
  • Preparation method and applications of modified bismuth oxybromide nanometer material

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[0031] The present invention will be described in further detail below with reference to the accompanying drawings and specific embodiments. It should be noted that the following examples are illustrative, not restrictive, and the protection scope of the present invention cannot be limited by the following examples. The raw materials required in the following examples and comparative examples are all commercially available. The X-ray diffractometer is the D8-Focus X-ray diffractometer of Bruker AXS Co., Ltd., Germany; the scanning electron microscope is the S-4800 field emission scanning electron microscope of Hitachi, Japan; T6 UV-Vis spectrophotometer.

[0032] A preparation method of a modified bismuth oxybromide nanomaterial, comprising the following steps:

[0033] (1) Weighing of samples and configuration of solutions

[0034] Take 0.485g Bi (NO 3 ) 3 ·5H 2 O, dissolved in 20 mL of water, sonicated for 15 min to form suspension A; weigh 0.119 g of KBr with an elect...

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Abstract

The invention discloses a preparation method and applications of a modified bismuth oxybromide nanometer material. According to the present invention, by adjusting the BiOBr synthesis condition, the specific surface area is increased on the basis of the changing of the morphology, such that the adsorption of BiOBr to Cr(VI) in water is enhanced while the contact area of the photocatalyst and the contaminant is increased so as to improve the photocatalytic reduction of BiOBr to Cr(VI); the material has suitable forbidden band width, and can absorb visible light, promote the rapid transfer of photogenerated electron holes, and reduce the recombination of electron holes so as to further improve the photocatalytic efficiency; and by using the material as the catalyst, the photocatalytic material obtained under the synthesis condition of pH value of 6 has strong adsorption and degradation ability to heavy metal Cr(VI) in wastewater, and can be well used in the heavy metal treatment in wastewater whether in high concentration pollution or low concentration pollution.

Description

technical field [0001] The invention belongs to the technical field of photocatalysis, in particular to a preparation method and application of a modified bismuth oxybromide nanomaterial. Background technique [0002] With the development of society and the progress of industry, chromium and its compounds have been widely used as important raw materials in metallurgy, electroplating, tanning, paint, pigment, printing and dyeing, pharmaceutical and other industries, but due to excessive consumption during use And the untimely treatment of waste liquid makes the chromium pollution in water and soil serious. Chromium exists in the environment mainly in two valence states, trivalent and hexavalent (Cr(VI)). Trivalent chromium is a trace element needed by the human body, but hexavalent chromium (Cr(VI)) is indeed a highly toxic heavy metal pollutant, and its toxicity is one hundred times that of trivalent chromium. Hexavalent chromium (Cr(Ⅵ)) is not only highly toxic, but also ...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J27/06C01G29/00B82Y40/00C02F1/30C02F101/22
CPCB01J27/06B01J35/004B82Y40/00C01G29/00C01P2002/72C01P2004/03C01P2004/24C01P2004/32C01P2004/62C01P2004/64C02F1/30C02F2101/22C02F2305/10
Inventor 贾丽霞于涛谭欣
Owner TIANJIN UNIV
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