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A kind of preparation method of directional growth srtio3 of flower shape

A directional growth and morphology technology, applied in chemical instruments and methods, physical/chemical process catalysts, metal/metal oxide/metal hydroxide catalysts, etc., can solve the problem of small specific surface area and less exposure of catalytic active sites, etc. problem, to achieve the effect of good catalytic activity, many catalytic active sites, and large yield

Inactive Publication Date: 2020-08-04
HEBEI UNIV OF TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The purpose of the present invention is to aim at present SrTiO 3 In the material system, the specific surface area is small, the catalytic active sites are less exposed, etc., and a flower-like morphology is provided for directional growth of SrTiO 3 preparation method

Method used

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  • A kind of preparation method of directional growth srtio3 of flower shape
  • A kind of preparation method of directional growth srtio3 of flower shape
  • A kind of preparation method of directional growth srtio3 of flower shape

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Experimental program
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Effect test

Embodiment 1

[0026] Step 1: Dissolve 1.6g (0.04mol) sodium hydroxide in 10mL deionized aqueous solution to obtain an aqueous solution with a concentration of about 4mol / L sodium hydroxide;

[0027] Step 2: Dissolve 0.848g (0.004mol) strontium nitrate in 5mL deionized water, stir at room temperature for 20-40min to obtain an aqueous solution of strontium nitrate; in addition, add 5mL aqueous solution of sodium hydroxide dropwise to In the aqueous solution of strontium nitrate, record it as liquid A; dissolve butyl titanate which is equimolar to strontium nitrate in 10mL of absolute ethanol, stir at room temperature for 20-40min, and add the remaining 5mL of sodium hydroxide aqueous solution dropwise to titanic acid In the dehydrated ethanol solution of butyl ester, obtain B liquid;

[0028] During the formation of liquid A and liquid B, the volume ratio of sodium hydroxide is 1:1.

[0029] Step 3: Add liquid A in the above step to liquid B slowly at a uniform speed, add 1g of PVP, stir at ...

Embodiment 2

[0033] Other steps are the same as in Example 1, except that the hydrothermal temperature in step 3 is changed from 160°C to 180°C. The product result that obtains is the same as embodiment 1

Embodiment 3

[0035] Other steps are the same as in Example 1, except that the hydrothermal temperature in step 3 is changed from 160°C to 200°C. The product result that obtains is the same as embodiment 1

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Abstract

The invention discloses a preparation method of SrTiO3 with a flower-like morphology and capable of growing in an oriented mode. The method comprises the following steps: (1) dropwise adding a sodiumhydroxide solution into a strontium nitrate solution to obtain a solution A; (2) dropwise adding the sodium hydroxide solution into an absolute ethyl alcohol solution of butyl titanate to obtain a solution B; (3) dropwise adding the solution A in the above step into the solution B at uniform speed, adding PVP, stirring, dropwise adding an HF solution, immediately filling a hydrothermal reactor, and performing hydrothermal reaction for 10-12 hours at a temperature of 160-200 DEG C; and (4), cleaning to obtain SrTiO3 nano-particles with the flower-like morphologies and capable of growing in theoriented mode. The SrTiO3 exposes a high-energy crystal surface with a higher proportion (110), and can provide more catalytic active sites, so that the SrTiO3 has good photocatalysis, electro-catalysis or photoelectric catalysis performance.

Description

technical field [0001] Technical scheme of the present invention relates to SrTiO 3 in the field of synthesis, specifically a directional growth SrTiO with a flower-like morphology 3 synthetic method. Background technique [0002] SrTiO 3 It is a typical perovskite structure compound and is a widely used electronic functional ceramic material. It has the characteristics of good thermal stability, low dielectric loss and high dielectric constant. It is widely used in the fields of ceramic industry, electronics and machinery. SrTiO 3 As a functional material, it has the characteristics of high band gap (3.2eV), excellent photocatalytic activity, etc., and has unique electromagnetic properties and redox catalytic activity. Photocatalytic fields such as batteries have also been widely used. Now some researchers often use SrTiO 3 Carry out modification or morphology control research to make it more practical in the field of photocatalysis. [0003] SrTiO prepared using con...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J23/02B01J35/00B01J35/02
CPCB01J23/02B01J35/0033B01J35/004B01J35/02
Inventor 卢遵铭魏海菲刘义于亚茹郭强张兴华
Owner HEBEI UNIV OF TECH
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