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A nanoparticle self-assembled peony-like la 3+ Doping zno and its preparation method and application

A nanoparticle and self-assembly technology, applied in catalyst activation/preparation, nanotechnology, nanotechnology, etc., can solve the problems of difficult rare earth ion doping, large radius gap, inconsistent valence, etc., and achieve simple equipment and exposed area. Large, low-cost effects

Active Publication Date: 2019-08-02
JILIN NORMAL UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the large gap between the radii of rare earth ions and zinc ions and the inconsistent valence states, it is difficult to dope rare earth ions into the ZnO lattice.
In addition, the photocatalytic performance of rare earth ions mainly depends on the surrounding environment and the symmetry of the host material, and the shape of the material has a great influence on its performance, so controlling the structure-activity relationship between the performance of the material and the shape and ion defects Will be a challenge for semiconductor photocatalysis technology

Method used

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  • A nanoparticle self-assembled peony-like la <sup>3+</sup> Doping zno and its preparation method and application
  • A nanoparticle self-assembled peony-like la <sup>3+</sup> Doping zno and its preparation method and application
  • A nanoparticle self-assembled peony-like la <sup>3+</sup> Doping zno and its preparation method and application

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] 1) Weigh 1.7849g Zn(NO 3 ) 2 ·6H 2 O and 3.6036g urea were dissolved in 60ml deionized water respectively, stirred at room temperature for 5min respectively, then the urea solution after the stirring was added to Zn(NO 3 ) 2 The solution was stirred at room temperature for 5 min.

[0027] 2) The stirred Zn(NO 3 ) 2The solution was placed in a 92°C drying oven to react for 7 hours. After cooling at room temperature, the precipitate was collected by centrifugation, and then alternately centrifuged with ethanol and deionized water for 2-3 times (centrifugal speed 12000rpm, 3min). The washed sample was placed under the condition of 60°C Dry for 30-40 minutes, collect the precursor after grinding. The precursor was taken out and ground, and then placed in a tube furnace at 400°C and annealed for 2 hours in an air atmosphere to obtain the final product.

Embodiment 2

[0029] 1) Weigh 1.7760g Zn(NO 3 ) 2 ·6H 2 O, 0.0130g La(NO 3 ) 3 ·6H 2 O and 3.6036g urea, the Zn(NO 3 ) 2 ·6H 2 O and La(NO 3 ) 3 ·6H 2 After mixing O, dissolve in 60ml deionized water and stir at room temperature for 5 minutes, take another 60ml of deionized water, dissolve urea in water and stir for 5 minutes at room temperature, then add the stirred urea solution into the mixed solution of Zn and La, and continue stirring at room temperature for 5 minutes.

[0030] 2) Put the stirred mixed solution in a 92°C drying oven to react for 7 hours, and centrifuge to collect the precipitate after cooling at room temperature, then alternately centrifuge and wash with ethanol and deionized water for 2-3 times (centrifugal speed 12000rpm, 3min), wash the The samples were dried at 60°C for 30-40 minutes, and the precursors were collected after grinding. The precursor was taken out and ground, and then placed in a tube furnace at 400°C and annealed for 2 hours in an air atmo...

Embodiment 3

[0032] 1) Weigh 1.7671g Zn(NO 3 ) 2 ·6H 2 O, 0.0260g La(NO 3 ) 3 ·6H 2 O and 3.6036g urea, the Zn(NO 3 ) 2 ·6H 2 O and La(NO 3 ) 3 ·6H 2 After mixing O, dissolve in 60ml deionized water and stir at room temperature for 5 minutes, take another 60ml of deionized water, dissolve urea in water and stir for 5 minutes at room temperature, then add the stirred urea solution into the mixed solution of Zn and La, and continue stirring at room temperature for 5 minutes.

[0033] 2) Put the stirred mixed solution in a 92°C drying oven to react for 7 hours, and centrifuge to collect the precipitate after cooling at room temperature, then alternately centrifuge and wash with ethanol and deionized water for 2-3 times (centrifugal speed 12000rpm, 3min), wash the The samples were dried at 60°C for 30-40 minutes, and the precursors were collected after grinding. The precursor was taken out and ground, and then placed in a tube furnace at 400°C and annealed for 2 hours in an air atmo...

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Abstract

The invention discloses nanoparticle self-assembled peony-like La<3+>-doped ZnO, a preparation method and applications thereof, and belongs to the technical field of nanometer functional materials. Inthe prior art, the high-stability and high-catalysis activity rare-earth doped ZnO nanometer photocatalyst with special morphology is required. Based on the problem in the prior art, according to thepresent invention, a precursor is prepared through a nanoparticle self-assembly method, the prepared precursor is transferred in an environment with a temperature of 400 DEG C, and annealing is performed to obtain the nanoparticle self-assembled peony-like La<3+>-doped ZnO, wherein the nanoparticle self-assembled peony-like La<3+>-doped ZnO can be used as a photocatalyst, and the intrinsic defect, the photo-generated carrier and the band gap in the ZnO can be regulated through the La<3+> ions; after the La<3+> ions are doped into the ZnO main body material according to the doping ratio of 0.5-1.5%, the lifetimes of the photo-generated electrons and the holes can be prolonged, the photocatalytic activity of the catalyst can be improved, and the light response range of ZnO can be expanded;andthe highest photocatalytic activity can be achieved when the doping ratio is 1.5%, wherein the Rhodamine B degradation rate is 98.2% after 3 h photocatalytic degradation.

Description

technical field [0001] The invention belongs to the technical field of nano functional materials. Background technique [0002] With the development of the times, environmental pollution is becoming more and more serious, among which water pollution has become a hot issue that people pay more and more attention to today. Among them, dyestuff is a more serious and thorny problem in water pollution. Dyestuffs are widely used in industries such as food, medicine, printing and dyeing and cosmetics. According to statistics, there are more than 100,000 types of dyes for commercial use. The annual output of dyes in the world is about 800,000 to 900,000 tons, while the annual output of dyes in my country is about 150,000 tons, ranking among the top in the world in dyes output. In the process of production and use, a large number of organic dye wastewater is released into the natural environment, so the rapid development of the global economy has also brought serious environmental ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J23/10B01J37/02C02F1/30B82Y30/00B82Y40/00C02F101/38
Inventor 郎集会王佳英韩强张旗杨景海
Owner JILIN NORMAL UNIV
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