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A kind of preparation method of cerium-bismuth composite oxide nanorod material

A composite oxide and nanorod technology, applied in bismuth compounds, chemical instruments and methods, rare earth metal oxides/hydroxides, etc., to achieve the effects of controllable aspect ratio, uniform morphology and broad application prospects

Active Publication Date: 2020-03-24
SOUTHWEST PETROLEUM UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the preparation method of Bi-doped cerium-bismuth composite oxide nanorod materials has not been reported yet.

Method used

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  • A kind of preparation method of cerium-bismuth composite oxide nanorod material
  • A kind of preparation method of cerium-bismuth composite oxide nanorod material
  • A kind of preparation method of cerium-bismuth composite oxide nanorod material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] Ce 0.99 Bi 0.01 o δ (The molar ratio of Ce to Bi is 0.99:0.01) Preparation of composite oxide nanorods.

[0023] First, dissolve 5.21g of cerium nitrate and 0.0588g of bismuth nitrate in 10mL of deionized water. After magnetically stirring to dissolve, add 40mL of 10mol / L sodium hydroxide solution, magnetically stir for 30min, and transfer the above solution to 100mL of polytetrafluoroethylene containing Lined stainless steel water heating kettle. Put the sealed reaction kettle in an oven, keep it at 80°C for 20 hours, and after natural cooling, filter and wash the reaction product, crush the obtained filter cake, add deionized water to make an emulsion, add polyethylene glycol 0.21g of aqueous solution was slurried, spray-dried, and the average particle size of the powder was controlled at 5 microns. The obtained powder was vacuum-dried at 80°C for 12h, then calcined at 150°C for 1h in an air atmosphere, and then calcined at 400°C for 2h to obtain a long Ce with a ...

Embodiment 2

[0025] Ce 0.95 Bi 0.05 o δ (The molar ratio of Ce to Bi is 0.95:0.05) Preparation of composite oxide nanorods.

[0026] First, dissolve 6.57g of ceric ammonium nitrate and 0.294g of bismuth nitrate in 10mL of deionized water. After magnetically stirring to dissolve, add 40mL of 10mol / L potassium hydroxide solution, magnetically stir for 30min, and transfer the above solution to 100mL of polytetrafluoroethylene-containing Lined stainless steel water heating kettle. Put the sealed reaction kettle into an oven, keep it at 100°C for 25 hours, and after natural cooling, filter and wash the reaction product, mash the obtained filter cake, add deionized water to make an emulsion, add polyethylene glycol containing 0.413g of aqueous solution was slurried, spray-dried, and the average particle size of the powder was controlled at 10 microns. The obtained powder was vacuum-dried at 80°C for 12h, then calcined at 200°C for 2h in an oxygen atmosphere, and then calcined at 500°C for 5h ...

Embodiment 3

[0028] Ce 0.9 Bi 0.1 o δ (The molar ratio of Ce to Bi is 0.9:0.1) Preparation of composite oxide nanorods.

[0029]First, dissolve 5.21g of cerium nitrate and 0.588g of bismuth nitrate in 10mL of deionized water. After magnetically stirring to dissolve, add 40mL of 10mol / L sodium hydroxide solution, magnetically stir for 30min, and transfer the above solution to 100mL of polytetrafluoroethylene containing Lined stainless steel water heating kettle. Put the sealed reaction kettle into an oven, keep it at 120°C for 20 hours, and after natural cooling, filter and wash the reaction product, mash the obtained filter cake, add deionized water to make an emulsion, add polyethylene glycol containing 1.033g of aqueous solution was slurried, spray-dried, and the average particle size of the powder was controlled at 5 microns. The obtained powder was vacuum-dried at 80°C for 12h, then calcined at 180°C for 1.5h in an air atmosphere, and then calcined at 500°C for 3h to obtain Ce with...

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Abstract

The invention relates to a method for preparing a cerium-bismuth compound oxide nano-bar material. The method combines a hydrothermal synthesis method and a spray drying method, adopts conventional equipment, has a simple and easily controlled preparation process, and is suitable for industrial production. The cerium-bismuth compound oxide nano-bar material prepared by the method has uniform appearance and a controllable length-diameter ratio, and still has excellent bar-shaped appearance after being roasted at 500 DEG C. The material has a wide application prospect, can be applied to thermo-catalytic, photo-catalytic and electro-catalytic reactions, and can be applied to the fields of biomedicine, luminescent materials and the like.

Description

technical field [0001] The invention relates to a preparation method of a cerium-bismuth composite oxide nanorod material, belonging to the technical field of nanomaterial preparation. Background technique [0002] Cerium oxide (CeO 2 ) due to its special The redox cycle shows excellent oxygen storage and release performance, and is widely used as a catalytic material in heterogeneous catalyst systems such as automobile exhaust purification and fuel cells (patent US5491120; US6255249; Huang X.S.et al.Applied Catalysis B: Environmental, 2009, 90:224; Zahir M.H. et al. Fuel Cells, 2009, 9:164-169; Yaroslava L., et al. Physical Chemistry Chemical Physics, 2016, 18:7672.). Its catalytic performance is closely related to the size, shape and composition of the material. Modulating the size of nanoparticles will change the adsorption and activation states of reactants, thereby affecting the performance of catalytic reactions, which has been a key area of ​​nanocatalysis researc...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01G29/00C01F17/32B82Y30/00B82Y40/00
CPCB82Y30/00B82Y40/00C01F17/206C01P2002/72C01P2004/04C01P2004/16C01P2004/64
Inventor 陈永东张超磊蒋炳正杨草萍赖南君柳具盆陈耀强
Owner SOUTHWEST PETROLEUM UNIV
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