Preparation method of vanadium-doped strontium titanate photocatalytic nanomaterial

A catalytic material, strontium titanate technology, applied in chemical instruments and methods, physical/chemical process catalysts, metal/metal oxide/metal hydroxide catalysts, etc., can solve the problem of large microstructure adjustability of materials , to achieve the effect of low preparation cost, simple method and wide application

Active Publication Date: 2018-10-12
WUHAN UNIV
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Problems solved by technology

The composition elements of perovskite are diverse, but the basic structure is similar. Past research on perovskite has provided the basis for the study of its physical properties and solid-state chemical properties, and provided guidance for the application of perovskite; the good crystal form of perovskite has It is beneficial to the characterization of the bulk phase structure, and it is also beneficial to infer its surface properties from the bulk phase structure, because the catalytic reaction mostly occurs on the surface of the catalyst, so mastering the surface properties of the catalyst is very critical for analyzing the reaction mechanism; in addition, because the elements that make up the perovskite itself and The diversity of doping elements, the valence state, stoichiometric ratio and defect density of different perovskite elements also have many differences, and the microstructure of the material is highly adjustable.

Method used

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  • Preparation method of vanadium-doped strontium titanate photocatalytic nanomaterial
  • Preparation method of vanadium-doped strontium titanate photocatalytic nanomaterial
  • Preparation method of vanadium-doped strontium titanate photocatalytic nanomaterial

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Experimental program
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Effect test

Embodiment 1

[0034] 1. Weigh 2.11g (0.01mol) Sr(NO 3 ) 2 Dissolve in 20ml deionized water, stir until completely dissolved;

[0035] 2. Add 2.8ml (C) dropwise to the solution obtained in a. 3 h 7 O) 4 Ti (ρ=0.9600g / mL), stirring while adding, to obtain a white suspension system as dispersed as possible;

[0036]3. Immediately add 0.8g NaOH to the mixed system obtained in b, and set the volume to 40ml (the concentration of NaOH is 0.5mol / L);

[0037] 4. Use an ultrasonic disperser to fully dissolve the Chinese medicine c, transfer it to a 50ml hydrothermal reaction kettle, and keep it warm at 200°C for 24 hours;

[0038] 5. The obtained SrTiO 3 A small amount of SrCO was washed away with 1% dilute nitric acid solution 3 , and then washed with deionized water, dried at 80°C for later use, and the obtained white solid powder is undoped pure phase strontium titanate.

Embodiment 2

[0040] 1. Weigh 2.11g (0.01mol) Sr(NO 3 ) 2 Dissolve in 20ml deionized water, stir until completely dissolved;

[0041] 2. Add 2.8ml (C) dropwise to the solution obtained in a. 3 h 7 O) 4 Ti (ρ=0.9600g / mL), stirring while adding, to obtain a white suspension system as dispersed as possible;

[0042] 3. Put 0.0045g of V 2 o 5 Add the mixed system obtained in b, while fully stirring, then add 0.8g NaOH, and set the volume to 40ml (the concentration of NaOH is 0.5mol / L);

[0043] 4. Use an ultrasonic disperser to fully dissolve the Chinese medicine c, transfer it to a 50ml hydrothermal reaction kettle, and keep it warm at 200°C for 24 hours;

[0044] 5. The obtained SrTiO 3 A small amount of SrCO was washed away with 1% dilute nitric acid solution 3 , and then washed with deionized water, dried at 80° C. for later use, and the obtained yellow solid powder is vanadium-doped strontium titanate with a doping amount of 0.5 mol%.

Embodiment 3

[0046] 1. Weigh 2.11g (0.01mol) Sr(NO 3 ) 2 Dissolve in 20ml deionized water, stir until completely dissolved;

[0047] 2. Add 2.8ml (C) dropwise to the solution obtained in a. 3 h 7 O) 4 Ti (ρ=0.9600g / mL), stirring while adding, to obtain a white suspension system as dispersed as possible;

[0048] 3. Add 0.0091g ​​of V 2 o 5 Add the mixed system obtained in b, while fully stirring, then add 0.8g NaOH, and set the volume to 40ml (the concentration of NaOH is 0.5mol / L);

[0049] 4. Use an ultrasonic disperser to fully dissolve the Chinese medicine c, transfer it to a 50ml hydrothermal reaction kettle, and keep it warm at 200°C for 24 hours;

[0050] 5. The obtained SrTiO 3 A small amount of SrCO was washed away with 1% dilute nitric acid solution 3 , and then washed with deionized water, dried at 80° C. for later use, and the obtained yellow solid powder is vanadium-doped strontium titanate with a doping amount of 1.0 mol%.

[0051] Do a series of tests for embodimen...

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Abstract

The invention provides a preparation method of vanadium-doped strontium titanate photocatalytic nanomaterial. The method is based on the principle of hydrothermal synthesis of a compound, a titanium source and a strontium source which are needed for synthesizing strontium titanate are mixed with a vanadium source needed for doping, the mixture is then subjected to a reaction for hours at a high temperature, and vanadium-doped strontium titanate is generated finally by growth. The method has the characteristics that less raw material types are needed, the operation method is simple and environmentally friendly, the process is simple, the cost is low and the like, and the prepared vanadium-doped strontium titanate photocatalytic nanomaterial has great significance in researching the photoresponse photocatalytic mechanism of the material and preparing other perovskite photocatalytic materials.

Description

technical field [0001] The invention belongs to the technical field of preparation of photocatalytic nanometer materials and treatment of environmental pollutants, and in particular relates to a preparation method and application of metal vanadium ion-doped strontium titanate. Background technique [0002] In 1972, Japanese scientists Fujishima and Honda used TiO 2 Experiments with electrodes for photocatalytic water splitting opened the door to research on semiconducting oxides as photocatalysts. Following TiO 2 Later, it was found that with d 0 The electronic configuration of titanate, niobate, tantalate and in the p region has d 10 Electron-configured photocatalysts have certain advantages in visible light response. Among them, titanates with perovskite structure, as a kind of semiconductor oxide photofunctional materials, have become one of the focuses in the field of photocatalysis in the past ten years. [0003] Perovskite has attracted attention in the field of ph...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/22B01J35/02
CPCB01J23/22B01J35/004B01J35/023
Inventor 曾玉彬王传义邓翠萍赵杰
Owner WUHAN UNIV
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