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Preparation method of porous strontium titanate cubic particles doped with rare earth erbium ions

A technology of cubic particles and erbium ions, applied in the field of material science, can solve the problem of low utilization of sunlight, and achieve the effects of large specific surface area, adjustable band gap, and excellent performance

Inactive Publication Date: 2019-08-09
CHINA JILIANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, SrTiO 3 The bandgap width is relatively high (3.2eV), and the degree of utilization of sunlight is low. At present, the form of heterogeneous combination and ion doping is often used to improve its bandgap width and photocatalytic efficiency.

Method used

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  • Preparation method of porous strontium titanate cubic particles doped with rare earth erbium ions
  • Preparation method of porous strontium titanate cubic particles doped with rare earth erbium ions

Examples

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Effect test

Embodiment 1

[0022] Weigh a certain amount of titanium sulfate and dissolve it in deionized water, stir well to obtain a solution A with a concentration of 0.005mol / L; add an appropriate amount of potassium hydroxide solution dropwise to the above solution A, and stir to form a precipitate B; After the precipitate B was cleaned several times with ionized water, the dissolved strontium nitrate of 1mol / L, erbium nitrate with a doping content of 1mol%, and potassium hydroxide solution with a concentration of 6mol / L were added successively, and stirred until fully dissolved; The mixture was transferred to a reaction kettle, and hydrothermal reaction was carried out at 180° C. for 15 hours. Finally, the reaction product was taken out, filtered, washed with deionized water and ethanol, dried, and transferred to a blast drying oven at 80°C for 5 hours to obtain a porous strontium titanate cube doped with rare earth erbium ions. particles.

Embodiment 2

[0024] Weigh a certain amount of titanium sulfate and dissolve it in deionized water, stir well to obtain a solution A with a concentration of 0.005mol / L; add an appropriate amount of potassium hydroxide solution dropwise to the above solution A, and stir to form a precipitate B; After the precipitate B was cleaned several times with ionized water, the dissolved strontium nitrate of 1.2mol / L, erbium nitrate with a doping content of 10mol% and potassium hydroxide solution with a concentration of 10mol / L were added successively, and stirred until fully dissolved; The above mixture was transferred to a reaction kettle, and hydrothermal reaction was carried out at 200° C., and the reaction time was 4 hours. Finally, the reaction product was taken out, filtered, washed with deionized water and ethanol, dried, and transferred to a blast drying oven at 60°C for 10 hours to obtain a porous strontium titanate cube doped with rare earth erbium ions. particles.

Embodiment 3

[0026] Weigh a certain amount of titanium sulfate and dissolve it in deionized water, stir well to obtain a solution A with a concentration of 0.005mol / L; add an appropriate amount of potassium hydroxide solution dropwise to the above solution A, and stir to form a precipitate B; After the precipitate B was cleaned several times with ionized water, the dissolved strontium nitrate of 1.1mol / L, erbium nitrate with a doping content of 5mol%, and potassium hydroxide solution with a concentration of 8mol / L were added successively, and stirred until fully dissolved; The above mixture was transferred to a reaction kettle, and hydrothermal reaction was carried out at 190° C., and the reaction time was 10 h. Finally, the reaction product was taken out, filtered, washed with deionized water and ethanol, dried, and transferred to a blast drying oven at 70°C for 8 hours to obtain a porous strontium titanate cubic doped with rare earth erbium ions. particles.

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Abstract

The invention discloses a preparation method of porous strontium titanate cubic particles doped with rare earth erbium ions. The method comprises the following steps that titanium sulfate and potassium hydroxide are dissolved into deionized water separately at first, an appropriate amount of potassium hydroxide solution is dripped into a titanium sulfate solution to form precipitation, and after washing is conducted many times, strontium nitrate, erbium nitrate and potassium hydroxide are mixed, then a hydrothermal reaction is conducted, and the porous strontium titanate cubic particles dopedwith the rare earth erbium ions are obtained after washing and drying are conducted. The porous strontium titanate cubic particles doped with the erbium ions have the advantages of being large in specific surface area, adjustable in band gap, excellent in oxidation and reduction catalytic activity and the like, and the method has wide application prospects in the fields of photocatalytic water-splitting for hydrogen production, photocatalytic degradation of organic pollutants, photochemical batteries and the like.

Description

technical field [0001] The invention relates to a method for preparing porous strontium titanate cubic particles doped with perovskite structure rare earth erbium ions, and belongs to the technical field of material science. Background technique [0002] Inorganic perovskite structure oxide, its general molecular formula is ABO 3 , Such oxides can be used to make precision electronic components such as medium and high voltage ceramic capacitors and PTC thermistors. Among them, strontium titanate (SrTiO 3 ) is a typical perovskite structure oxide with high dielectric constant, low dielectric loss and excellent thermal stability, and is widely used in the field of electronic components. At the same time, SrTiO 3 With the characteristics of excellent photocatalytic activity, it has also been widely used in photocatalytic fields such as photocatalytic degradation of organic pollutants, photocatalytic water splitting to produce hydrogen, and photochemical cells. However, SrTi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/10B01J35/02B01J35/10
CPCB01J23/10B01J35/50B01J35/61B01J35/39
Inventor 朱静肖珍张嘉玮王焕平徐时清
Owner CHINA JILIANG UNIV
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