Preparation method and application of fluorine-boron codoped TiO2 nanosheets

A nanosheet and co-doping technology, applied in nanomaterials and nanometer fields, can solve problems such as crystal face exposure of migration efficiency, and achieve the effect of improving photocatalytic performance, obvious catalytic effect, and improved absorption rate.

Inactive Publication Date: 2014-06-25
宿州学院
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0010] Based on the above discussion, it can be seen that in the preparation of TiO with high photocatalytic efficiency 2 In the process, there have been no reports in the literature that can simultaneously achieve visible light absorption, high photogenerated carrier transfer efficiency, and (001) crystal plane exposed TiO 2 controllable equipment technology

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  • Preparation method and application of fluorine-boron codoped TiO2 nanosheets
  • Preparation method and application of fluorine-boron codoped TiO2 nanosheets
  • Preparation method and application of fluorine-boron codoped TiO2 nanosheets

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Embodiment 1

[0030] Measure a volume of 30ml ethanol solution as the precursor, slowly add 1ml of 15wt%TiCl 3Solution, stirred with a magnetic stirrer for 5 minutes to generate a uniform suspension; the solution prepared in the above steps was poured into a polytetrafluoroethylene autoclave liner with a volume of 50ml, and then 0.75ml of 40wt% HBF was added dropwise 4 The solution is put into the inner tank of the reaction kettle, and the temperature is kept at 210°C for 12 hours; the solid-liquid mixture obtained is subjected to solid-liquid centrifugation, washed 4 times with ethanol and dried at a constant temperature of 80°C for 10 hours; the obtained product is subjected to subsequent heat treatment at 450°C for 3 hours, Grinding into powder to obtain fluorine-boron co-doped with high degree of crystallization, (001) crystal plane exposed TiO 2 Nanosheets.

Embodiment 2

[0032] Measure a volume of 30ml ethanol solution as the precursor, slowly add 1ml of 15wt%TiCl 3 Solution, stirred with a magnetic stirrer for 5 minutes to generate a uniform suspension; pour the solution prepared in the above steps into a polytetrafluoroethylene autoclave liner with a volume of 50ml, and then drop 0 to 1ml of 40wt% HBF 4 Put the solution into the inner tank of the reaction kettle, and keep the temperature at 210°C for 12 hours; the solid-liquid mixture obtained is subjected to solid-liquid centrifugation, washed with ethanol three times and dried at a constant temperature of 80°C for 10 hours; the obtained product is subjected to subsequent heat treatment at 400°C for 4 hours, Grinding into powder to obtain fluorine-boron co-doped with high degree of crystallization, (001) crystal plane exposed TiO 2 Nanosheets.

Embodiment 3

[0034] Measure a volume of 30ml ethanol solution as the precursor, slowly add 1ml of 15wt%TiCl 3 Solution, stirred with a magnetic stirrer for 5 minutes to generate a uniform suspension; the solution prepared in the above steps was poured into a polytetrafluoroethylene autoclave liner with a volume of 50ml, and then 0.5ml of 40wt% HBF was added dropwise 4 The solution is put into the inner tank of the reaction kettle, and the temperature is kept at 210°C for 12 hours; the solid-liquid mixture obtained is subjected to solid-liquid centrifugation, washed with ethanol three times and dried at a constant temperature of 70°C for 10 hours; the obtained product is subjected to subsequent heat treatment at 400°C for 3 hours Grinding into powder to obtain fluorine-boron co-doped with high degree of crystallization, (001) crystal plane exposed TiO 2 Nanosheets.

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Abstract

The invention relates to the fields of nanometer structures and nanotechnology and in particular relates to a fluorine-boron codoped TiO2 nanosheet and a preparation method and application of the fluorine boron codoped TiO2 nanosheet. The fluorine-boron codoped TiO2 nanosheet is in an anatase structure, fluorine and boron are doped into crystal lattices, the exposed crystal face is a crystal face (001) and is in the shape of a sheet, the thickness of the nanosheet is 1-100nm, and edges for forming the nanosheet unit are in smooth transition. Compared with pure anatase TiO2 nanoparticles, the fluorine-boron codoped TiO2 nanosheet exposed on the crystal face (001) has the advantages that the absorption rate of visible light is obviously improved, an obvious red shift phenomenon exists, the photogenerated electron-hole migration efficiency is improved, and high-activity crystal face (001) is greatly exposed, so that the photocatalytic performance of the nanosheet is obviously enhanced. The fluorine-boron codoped TiO2 nanosheet can have high application prospects in the aspect of treatment of a photocatalytic environment, for example, the nanosheet can serve as a photocatalyst to be used for water purification.

Description

technical field [0001] The invention relates to the field of nanomaterials and nanotechnology, in particular to a fluorine-boron co-doped TiO 2 Nanosheet, preparation method and use. Background technique [0002] Since the discovery of photocatalytic phenomena in the 1970s, the design and preparation of photocatalytic materials and the improvement of their photocatalytic activity have always been the frontier hot areas of research by scientists. Anatase TiO 2 As one of the most important metal oxides, it has been widely and deeply studied in the field of photocatalysis. It has the advantages of non-toxicity, high catalytic efficiency, good stability, and low cost. It is an ideal photocatalytic material. [0003] Generally speaking, the semiconductor-based photocatalytic process mainly involves three key steps: 1) Exciting light irradiation induces electrons to migrate from the valence band to the conduction band to form electron-hole pairs; 2) Photoinduced electron and hole...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J27/135C02F1/32
CPCY02W10/37
Inventor 许海峰李鸿曹保银
Owner 宿州学院
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