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Preparation method of clay-perovskite composite material and application thereof

A composite material and perovskite technology is applied in the application field of photocatalytic degradation of antibiotics to achieve the effects of increasing lattice defects, uniform dispersion and favorable catalytic activity

Active Publication Date: 2016-06-22
CHANGZHOU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Removing tetracyclines from wastewater and surface water will be a serious challenge

Method used

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  • Preparation method of clay-perovskite composite material and application thereof
  • Preparation method of clay-perovskite composite material and application thereof
  • Preparation method of clay-perovskite composite material and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] First weigh 0.214g of lanthanum nitrate, 0.07146g of cerium nitrate, and dissolve 0.33g of ferric nitrate in 100ml of deionized water, then add 0.336g of complexing agent citric acid, and finally add 1g of halloysite, and stir for 2h to obtain Mix the solution, then place it in a water bath at 70°C for 18 hours, evaporate the water to obtain a wet gel, dry it in a drying oven at 80°C, and when the wet gel becomes a dry gel, place it in a muffle furnace at 550°C , calcined at 1° C. / min, and finally ground to obtain a cerium-doped lanthanum ferrite / halloysite nanostructure composite material with a loading of 20 wt%.

[0024] Carry out X-ray powder diffraction experiment to the above-mentioned sample of gained, and observe its morphology and structure under the transmission electron microscope, the lanthanum ferrite / halloysite nanostructure composite material and The XRD patterns of lanthanum ferrite, halloysite, and lanthanum ferrite / halloysite nanostructure composites a...

Embodiment 2

[0029] First weigh 0.211g of lanthanum nitrate and 0.234g, and dissolve 0.11g of cerium nitrate and ferric nitrate in 100ml of deionized water, then add 0.168g of complexing agent citric acid, and finally add 1g of halloysite, and stir for 2h to obtain Mix the solution, then place it in a water bath at 70°C for 18 hours, evaporate the water to obtain a wet gel, dry it in a drying oven at 80°C, and when the wet gel becomes a dry gel, place it in a muffle furnace at 550°C , calcined at 1° C. / min, and finally ground to obtain a cerium-doped lanthanum ferrite / halloysite nanostructure composite material with a loading of 20 wt %. The subsequent detection is as in Example 1.

Embodiment 3

[0031] First weigh 0.166g of lanthanum nitrate and 0.211g, 0.21g of cerium nitrate, ferric nitrate dissolved in 100ml of deionized water, then add 0.168g of complexing agent citric acid, finally add 1g of halloysite, stir for 2h to obtain Mix the solution, then place it in a water bath at 70°C for 18 hours, evaporate the water to obtain a wet gel, dry it in a drying oven at 80°C, and when the wet gel becomes a dry gel, place it in a muffle furnace at 550°C , calcined at 1° C. / min, and finally ground to obtain a cerium-doped lanthanum ferrite / halloysite nanostructure composite material with a loading of 20 wt %. The subsequent detection is as in Example 1.

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Abstract

The invention belongs to the field of the energy and chemical industry and particularly relates to a preparation method of a nanometer material using clay as a carrier and using a perovskite type compound as an active component and application of the nanometer material in photocatalytic degradation of antibiotics.Lanthanum nitrate, ferric nitrate, cerous nitrate, citric acid and the clay are added to deionized water and are mixed, then the mixture is transferred to a water bath kettle for evaporation to obtain wet gel, and drying, calcinations and dry grinding are performed to obtain the lanthanum ferrite / clay nano-structure composite material.The antibiotics are subjected to the photocatalytic degradation by adopting the composite material and can be rapidly degraded under visible light by utilizing the high catalytic activity of (cerium doped) lanthanum ferrite.The clay carrier facilitates antibiotic molecular adsorption in the antibiotic degradation process, the antibiotics are in contact with the lanthanum ferrite after being absorbed to the catalyst surface, and antibiotic molecules are decomposed under visible light irradiation to produce other active species.

Description

technical field [0001] The invention belongs to the field of energy and chemical industry, and in particular relates to a preparation method of a nanomaterial with clay as a carrier and perovskite compound nanoparticles as an active component and its application for photocatalytic degradation of antibiotics. Background technique [0002] In recent years, the problem of environmental pollution has become increasingly serious, and the problem of energy shortage is also imminent. In the face of the above two crises, people have launched scientific research on pollution control and environmental protection. Taking semiconductors as catalysts and using sunlight to catalyze oxidation and degradation of pollutants as an effective method of pollution control has become a hot spot in environmental protection scientific research. [0003] Tetracycline is a widely used antibiotic and has become the second most used antibiotic in the world. Tetracyclines are widely used, especially in...

Claims

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Application Information

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IPC IPC(8): B01J23/83C02F1/30
CPCC02F1/30B01J23/002B01J23/83B01J37/036C02F2101/34C02F2101/36C02F2101/38C02F2305/10B01J2523/00B01J35/393B01J35/39B01J2523/3706B01J2523/3712B01J2523/842Y02W10/37
Inventor 李霞章朱伟姚超罗士平陆晓旺左士祥
Owner CHANGZHOU UNIV
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