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Molybdenum modified zirconia material and preparation method and application thereof

A technology of zirconium dioxide and carbon dioxide, which is applied in the field of photocatalytic materials, can solve the problems of increasing surface area and complicated preparation process, and achieves the effects of simple operation, simple preparation process and saving preparation time and cost

Active Publication Date: 2022-07-15
SHAANXI UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Ba'rbara Samaranch et al. reported in Chemistry of Materials (Vol.18, No.6, 2006) that the prepared molybdenum-modified tetragonal zirconia did not cause changes in the crystal structure of zirconia as the amount of modification changed , but increases the surface area
In summary, the above preparation processes and application fields have their own characteristics, but the previous preparation processes often required the addition of surfactants or calcination processes, and the preparation process was more complicated.

Method used

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  • Molybdenum modified zirconia material and preparation method and application thereof
  • Molybdenum modified zirconia material and preparation method and application thereof
  • Molybdenum modified zirconia material and preparation method and application thereof

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Experimental program
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Effect test

Embodiment 1

[0032] A preparation method of molybdenum-modified zirconium dioxide, comprising the following steps:

[0033] 1) Weigh 100 mg of ammonium paramolybdate tetrahydrate, dissolve it in 100 mL of deionized water, and shake to obtain a solution of ammonium paramolybdate tetrahydrate with a concentration of 1 mg / mL.

[0034] 2) Add 0.5g of zirconium nitrate pentahydrate to 50mL of polytetrafluoroethylene lining, then add 2.58mL of ammonium paramolybdate tetrahydrate solution, stir for 30 minutes, wait for the solid to be fully dissolved, and put the lining into the reactor after mixing evenly The reaction was carried out at 200°C for 10 hours.

[0035] 3) After the reaction is finished, after natural cooling, the lower layer precipitate is left.

[0036] 4) Wash the precipitate with deionized water and anhydrous ethanol several times until the pH is 7, and grind it in an oven at 60°C for 6 hours to obtain 1% molybdenum-modified zirconia photocatalytic material (1% is The ratio of ...

Embodiment 2

[0040] A preparation method of molybdenum-modified zirconium dioxide, comprising the following steps:

[0041] 1) Weigh 100 mg of sodium molybdate dihydrate, dissolve it in 100 mL of deionized water, and shake to obtain a sodium molybdate dihydrate solution with a concentration of 1 mg / mL.

[0042] 2) Add 0.5g of zirconium oxychloride to 50mL of polytetrafluoroethylene lining, then add 2.363mL of sodium molybdate dihydrate solution, stir for 30 minutes, until the solid is fully dissolved, and mix the lining into the reactor , and reacted at 250 °C for 6 hours.

[0043] 3) After the reaction is finished, after natural cooling, the lower layer precipitate is left.

[0044] 4) Wash the precipitate several times with deionized water and absolute ethanol until the pH is 7, bake at 60° C. for 6 hours and then grind to obtain 0.5% molybdenum modified zirconia photocatalytic material (0.5% is the mass of molybdenum element). and theoretical zirconium dioxide mass ratio).

Embodiment 3

[0046] A preparation method of molybdenum-modified zirconium dioxide, comprising the following steps:

[0047] 1) Weigh 100 mg of molybdenum nitrate pentahydrate, dissolve it in 100 mL of deionized water, and shake to obtain a solution of molybdenum nitrate pentahydrate with a concentration of 1 mg / mL.

[0048] 2) Add 0.5g of zirconium oxynitrate to 50mL of polytetrafluoroethylene lining, then add 1.203mL of molybdenum nitrate pentahydrate solution, stir for 30 minutes, wait for the solid to be fully dissolved, and after mixing evenly, put the liner into the reaction kettle, and put it in the reactor. The reaction was carried out at 180°C for 10 hours.

[0049] 3) After the reaction is finished, after natural cooling, the lower layer precipitate is left.

[0050] 4) Wash the precipitate several times with deionized water and absolute ethanol until the pH is 7, bake at 60° C. for 6 hours and then grind to obtain 0.1% molybdenum modified zirconia photocatalytic material (0.1% m...

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Abstract

The invention discloses a molybdenum-modified zirconia material and a preparation method thereof. The zirconium source and the molybdenum source are mixed, and the molybdenum-modified zirconia material is synthesized by a hydrothermal method at a certain temperature. The synthesis process has the advantages of mild conditions and easy operation. Simple and safe, the preparation process is simple, and the preparation time cost and raw material cost can be saved. Molybdenum-modified zirconia material is a kind of zirconia crystal with coexistence of monoclinic and tetragonal phases, which is used in photocatalytic reduction of CO. 2 In the activity test experiment, the activity of molybdenum-modified zirconia is significantly higher than that of unmodified zirconia, and the carbon monoxide production is up to 12 times higher, so the material can be used in the field of photocatalysis to reduce carbon dioxide.

Description

technical field [0001] The invention belongs to the technical field of photocatalytic materials, and particularly relates to a molybdenum-modified zirconia material and a preparation method and application thereof. Background technique [0002] The large amount of carbon dioxide emitted from the burning of fossil fuels is the fundamental cause of global climate change, thus causing many environmental problems. Therefore, capturing carbon dioxide and converting it into energy has become a global research problem. As an important carbon source, carbon dioxide is converted into carbon monoxide or other carbon-containing compounds, which has become the focus of research in the chemical and environmental industries. In recent years, photocatalytic technology has attracted the attention of many researchers due to its various advantages, and it is expected to reduce carbon dioxide to carbon monoxide or other carbon-containing compounds by photocatalytic technology. It is generall...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J23/28C01B32/40
CPCB01J23/28B01J23/002B01J35/004C01B32/40
Inventor 赵杰冯帅军白雨洁梁芯芯
Owner SHAANXI UNIV OF SCI & TECH