Preparation method of visible-light response nano La/Ni-SrTiO3

A visible light and nanotechnology, applied in the direction of nanotechnology, nanotechnology, and nanotechnology for materials and surface science, can solve problems such as insignificant response to visible light, easy aggregation of particles, and complicated preparation technology of strontium titanate. The effect of uniform shape and uniform distribution

Inactive Publication Date: 2016-05-18
HEBEI UNIV OF TECH
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  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The technical problem to be solved by the present invention is to provide a visible light responsive nano-La / Ni-SrTiO in view of the shortcomings of the current strontium titanate preparation technology, such as complex preparation technology, low yield, easy particle agglomeration, and insignificant response to visible light. 3 preparation method

Method used

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  • Preparation method of visible-light response nano La/Ni-SrTiO3
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  • Preparation method of visible-light response nano La/Ni-SrTiO3

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Experimental program
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Effect test

Embodiment 1

[0024] (1) 0.01mol strontium nitrate (mass is 2.12g), 0.086g lanthanum nitrate, 0.058g nickel nitrate were dissolved in 4.3mL water, and stirred at room temperature on a magnetic stirrer for 30min to obtain strontium nitrate-lanthanum nitrate-nickel nitrate - A mixed solution of water. Dissolve 0.025 mol of citric acid in 5 mL of deionized water, and stir for 30 min at room temperature on a magnetic stirrer to prepare an aqueous solution of citric acid. Mix the obtained strontium nitrate-lanthanum nitrate-nickel nitrate aqueous solution and citric acid aqueous solution, and stir on a magnetic stirrer at room temperature for 30 min, and record it as liquid A. Dissolve 0.01 mol of butyl titanate in 10.2 mL of ethylene glycol, and stir for 30 min at room temperature on a magnetic stirrer, and record it as liquid B.

[0025] (2) After raising the temperature of liquid A obtained in step (1) to 55°C, drop liquid B into liquid A at a constant speed, and stir while adding to prevent...

Embodiment 2、 example 3

[0032] Dissolve 0.086g of lanthanum nitrate in step (1) in Example 1 in 4.3mL of deionized water and change it to 0.0645g and 0.1075g respectively.

Embodiment 4、 example 5

[0034] Dissolve 0.086g of lanthanum nitrate in step (1) in Example 1 in 4.3mL of deionized water, and change it to 0.043g and 0.129g respectively (equivalent to containing 0.01g and 0.03g of lanthanum nitrate in every milliliter of water), and all other operations are Same as Example 1, the product obtained is obviously worse than Example 1 to the degree of absorption of visible light, which shows that the concentration of lanthanum nitrate has a great influence on product performance. Hours will also have an adverse effect on product performance, so when the concentration of lanthanum nitrate meets the solution of 0.015-0.025g lanthanum nitrate per milliliter of deionized water in this solution, the product obtained has the best absorption performance for visible light.

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Abstract

The invention provides a preparation method of visible-light response nano La/Ni-SrTiO3. The method includes the following steps that firstly, an aqueous solution containing strontium nitrate, lanthanum nitrate and nickel nitrate is mixed with a citric acid aqueous solution, and a solution A is obtained; butyl titanate is dissolved in ethylene glycol to obtain a solution B; secondly, the solution B is dropped in the solution A at a constant speed, and sol is obtained; thirdly, the sol is heated and stirred, and wet gel is obtained; fourthly, a potassium hydroxide solution with the concentration being 5 mol/L is added into the wet gel, and a mixture is obtained; fifthly, the mixture is contained in a high-pressure kettle, and heat preservation is performed for 20-24 h at the temperature of 200 DEG C; sixthly, obtained matter is dried after being washed, and nano La/Ni-SrTiO3 is obtained. Elements can be well added into SrTiO3 through a sol-gel hydrothermal method, and an obtained sample has remarkable responses on visible light. The method is simple in preparation technology, low in cost and high in yield, the diameter of the obtained product reaches nano scale, and the obtained product is evenly distributed.

Description

technical field [0001] The technical scheme of the present invention relates to nano La / Ni-SrTiO responsive to visible light 3 in the field of synthesis, specifically a visible-light-responsive nano-La / Ni-SrTiO 3 method of preparation. Background technique [0002] SrTiO 3 It belongs to perovskite structure compound and is a kind of electronic functional ceramic material with wide application. It has the characteristics of good thermal stability, low dielectric loss and high dielectric constant. It is widely used in ceramic industry, electronics and machinery fields. And, SrTiO 3 As a functional material with good photocatalytic activity, it has been widely used in photocatalytic fields such as photocatalytic degradation of organic pollutants and photochemical cells. However, due to the SrTiO 3 The optical bandgap E g =3.2eV, it can only absorb ultraviolet light, which limits its application to visible light. Therefore, some research scholars now often pass the SrTiO ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/83B82Y40/00B82Y30/00
CPCB01J23/83B01J35/004B82Y30/00B82Y40/00
Inventor 卢遵铭李双双于亚茹李应鑫于景景张兴华
Owner HEBEI UNIV OF TECH
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