Preparation method of density-adjustable hollow strontium titanate material

A strontium titanate, hollow technology, applied in titanate, alkaline earth metal titanate, chemical instruments and methods, etc., can solve problems such as difficult recycling, and achieve the effect of uniform size and complete shape

Inactive Publication Date: 2017-01-25
SHENYANG LIGONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

When nano-powder strontium titanate is used to purify pollutants in water, there are disadvantages such as difficult recovery and the need to rely on dynamic stirring to maintain suspension.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] A method for preparing a hollow strontium titanate material with adjustable density, comprising the following process steps:

[0026] Step 1: Preparation of foam core material

[0027] Step 1.1: Mix 35 mL of ethanol, 2.6 mL of tetra-tert-butylisopropylamine, 15 mL of ethyl silicate, 2.2 mL of deionized water, 1.1 mL of directing agent S-81 and 0.6 g of stabilizer T123 in a 200 mL beaker;

[0028] Step 1.2: Move the mixed solution into a stainless steel autoclave; put the autoclave in a constant temperature electric drying oven, raise the temperature to 220 °C, and keep it warm for 72 h;

[0029] Step 1.3: After the autoclave is cooled to room temperature, the product is treated in an ultrasonic cleaner for 30 minutes;

[0030] Step 1.4: The obtained solid-liquid mixture was suction-filtered under reduced pressure, and washed with ethanol for 3 times to obtain a solid filter cake;

[0031] Step 1.5: Dry the filter cake in a constant temperature electric oven at 125 °C ...

Embodiment 2

[0042] A method for preparing a hollow strontium titanate material with adjustable density, comprising the following process steps:

[0043] Step 1: Preparation of foam core material

[0044] Step 1.1: Mix 40 mL of ethanol, 1.6 mL of tetra-tert-butylisopropylamine, 20 mL of ethyl silicate, 2.3 mL of deionized water, 1.3 mL of directing agent S-81 and 0.7 g of stabilizer T123 in a 200 mL beaker;

[0045] Step 1.2: Move the mixed solution into a stainless steel autoclave; put the autoclave in a constant temperature electric drying oven, raise the temperature to 220 °C, and keep it warm for 72 h;

[0046] Step 1.3: After the autoclave is cooled to room temperature, the product is treated in an ultrasonic cleaner for 30 minutes;

[0047] Step 1.4: The obtained solid-liquid mixture was suction-filtered under reduced pressure, and washed with ethanol for 3 times to obtain a solid filter cake;

[0048] Step 1.5: Dry the filter cake in a constant temperature electric oven at 125 °C ...

Embodiment 3

[0059] A method for preparing a hollow strontium titanate material with adjustable density, comprising the following process steps:

[0060] Step 1: Preparation of foam core material

[0061] Step 1.1: Mix 46 mL of ethanol, 2.2 mL of tetra-tert-butylisopropylamine, 18 mL of ethyl silicate, 2.5 mL of deionized water, 1.4 mL of directing agent S-81 and 0.8 g of stabilizer T123 in a 200 mL beaker;

[0062] Step 1.2: Move the mixed solution into a stainless steel autoclave; put the autoclave in a constant temperature electric drying oven, raise the temperature to 220 °C, and keep it warm for 72 h;

[0063] Step 1.3: After the autoclave is cooled to room temperature, the product is treated in an ultrasonic cleaner for 30 minutes;

[0064] Step 1.4: The obtained solid-liquid mixture was suction-filtered under reduced pressure, and washed with ethanol for 3 times to obtain a solid filter cake;

[0065] Step 1.5 Dry the filter cake in a constant temperature electric oven at 125 °C f...

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PUM

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Abstract

The invention provides a preparation method of a density-adjustable hollow strontium titanate material. A foam core material is prepared. The preparation method comprises the following steps: preparing a solution from ethanol, tetra-tert isopropylamine, ethyl silicate, deionized water, a guiding agent S-81 and a stabilizer T 123 in a high-pressure reactor at the temperature of 220 DEG C, and insulating for 72 hours; strontium titanate coating: preparing mixed liquor from tetra-n-butyl titanate, ethanol, butanediol, a guiding agent R-53, the foam core material, strontium nitrate, deionized water and a surfactant AP-9 in the high-pressure reactor at the temperature of 180 DEG C, and insulating for 24 hours; and aperture modified treatment: calcining in a programmed electric box furnace at the temperature of 700-900 DEG C. Foamed core materials with different aperture distribution features are prepared, and the density of the hollow strontium titanate material can be adjusted.

Description

technical field [0001] The invention belongs to the field of environmental purification functional materials, and in particular relates to a preparation method of a hollow strontium titanate material with adjustable density. Background technique [0002] Hollow materials refer to a class of materials that have a pore structure of a specific shape inside the material. The pore structure in the hollow material can become a channel for the adsorbate molecules to enter the internal pore structure of the material. Hollow materials have the characteristics of large specific surface area, low density, low refractive index, and low thermal expansion coefficient, making hollow materials widely used in catalyst carriers, anti-radiation surface materials, rechargeable batteries, etc. Hollow materials have unique and excellent photocatalytic properties, not only because of the increased specific surface area, but also the hollow structure can stabilize their active centers. In the hol...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01G23/00
CPCC01G23/006
Inventor 张文杰
Owner SHENYANG LIGONG UNIV
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