Bi2O3/BiFeO3/TiO2 nano-flower photocatalytic material and preparation method thereof

A catalytic material, nanoflower technology, applied in metal/metal oxide/metal hydroxide catalysts, chemical instruments and methods, physical/chemical process catalysts, etc., to achieve high feasibility, improve visible light utilization, and simple operation. Effect

Inactive Publication Date: 2015-07-15
DALIAN UNIV OF TECH
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  • Abstract
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  • Claims
  • Application Information

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Problems solved by technology

However, currently for the Bi of the triple system 2 o 3 / BiFeO 3 / TiO 2 The preparation of nano flower composite material has not been reported at home and abroad, therefore, the present invention proposes a Bi 2 o 3 / BiFeO 3 / TiO 2 The preparation method of nano flower catalytic material, aims to pass Bi 2 o 3 / BiFeO 3 Particles and TiO 2 Nanoflower composite to improve the solar light utilization rate and photocatalytic efficiency of the catalyst, in order to improve the nanostructured TiO 2 The practical application efficiency of materials for photocatalytic degradation of pollutants provides new options

Method used

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  • Bi2O3/BiFeO3/TiO2 nano-flower photocatalytic material and preparation method thereof

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Embodiment 1

[0022] First prepare TiO 2 For nanoflowers, add 2ml of TBOT and 10ml of glycerol into 30ml of ethanol, stir magnetically for 5 minutes, mix the two solutions, continue stirring for 10 minutes, transfer the solution to a 100ml polytetrafluoroethylene reactor, and heat it at 180°C After reacting for 24 hours and cooling down to room temperature naturally, the collected products were washed with ethanol and centrifuged three times, dried at 80°C and then calcined in a muffle furnace at 450°C for 3h with a heating rate of 2°C / min. Second, the preparation of Bi 2 o 3 / BiFeO 3 Nanoparticles, weigh 0.9095g Bi(NO 3 ) 3 ·5H 2 O and 0.5050g Fe(NO 3 ) 3 9H 2 O was put into 20ml of ethylene glycol solution, stirred for 10min, put the sol in an oil bath at 80°C for 2h, then raised the temperature to 120°C and stirred until the solution was completely evaporated. The powder formed in the beaker was transferred to a 30ml crucible and calcined in a muffle furnace at 500°C for 2h at a...

Embodiment 2

[0024] According to the method of the present invention in embodiment 1, hydrothermal method prepares TiO 2 The amount of nanoflower TBOT was increased to 4ml, the amount of other raw materials and the experimental steps remained unchanged, and Bi 2 o 3 / BiFeO 3 / TiO 2 Nanoflower composites.

Embodiment 3

[0026] According to the method of the present invention in embodiment 1, hydrothermal method prepares TiO 2 The amount of nanoflower TBOT was increased to 6ml, the amount of other raw materials and the experimental steps remained unchanged, and Bi 2 o 3 / BiFeO 3 / TiO 2 Nanoflower composites.

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Abstract

The invention relates to a novel Bi2O3 / BiFeO3 / TiO2 nano-flower photocatalytic material and a preparation method thereof and belongs to the technical field of catalytic material and nano material preparation. The preparation method comprise the following steps: preparing TiO2 nano-flower and Bi2O3 / BiFeO3 particles by adopting a hydrothermal method and a sol-gel method and loading the Bi2O3 / BiFeO3 particles onto the surface of the TiO2 nano-flower through a bonding method to form a ternary structure, so as to improve the separation efficiency of photo-generated electrons-hole pairs and the utilization rate of solar light. The TiO2 nano-flower prepared through the hydrothermal method is uniform in appearance and grain size distribution; the Bi2O3 / BiFeO3 particles are uniformly dispersed on the surface of the TiO2 nano-flower to form the Bi2O3 / BiFeO3 / TiO2 nano-flower photocatalytic material. The preparation method is simple, feasible, cheap in raw material, low in equipment requirement and environment-friendly, and has certain application prospect and potential in the aspect of photocatalytic degradation of pollutants.

Description

technical field [0001] The present invention relates to a novel Bi 2 o 3 / BiFeO 3 / TiO 2 The preparation method of nano flower photocatalytic material, specifically Bi 2 o 3 / BiFeO 3 Heterojunction nanoparticles and TiO 2 The preparation of nano flower composite material belongs to the technical preparation field of catalytic materials and nano materials. Background technique [0002] As a traditional photocatalyst, TiO 2 Because of its stability, non-toxicity, low price and other advantages, it has been widely studied and applied in the field of photocatalysis. Compared with other microstructured materials, the three-dimensional structure of TiO 2 Nanoflowers have larger specific surface area, stronger light absorption, higher surface orientation and crystallinity, and better photocatalytic performance. However, as a semiconductor catalyst with a wide bandgap, titanium dioxide can only absorb and utilize ultraviolet light that accounts for about 4% of the solar sp...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/843
Inventor 肇启东刘玉洁李新勇石勇
Owner DALIAN UNIV OF TECH
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