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a cevo 4 -la 2 o 3 Preparation method and application of @hnts composite photocatalyst

A catalyst and composite light technology, applied in the direction of metal/metal oxide/metal hydroxide catalyst, physical/chemical process catalyst, chemical instrument and method, etc., can solve problems such as unfavorable electron and hole transfer, hidden dangers, threats, etc. , to achieve the effect of easy operation, high efficiency and good adsorption capacity

Inactive Publication Date: 2019-12-03
JIANGSU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Tetracycline antibiotics are one of the most widely used antibiotics in the world, and they are also one of the pharmaceuticals and personal care products (PPCPs). The antibiotics left in soil and water are harmful to human health and food safety. Greater threats and hidden dangers
However, due to its strong absorption in the ultraviolet region, it has a wide band gap, which is not conducive to the transfer of electrons and holes.

Method used

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  • a cevo <sub>4</sub> -la <sub>2</sub> o <sub>3</sub> Preparation method and application of @hnts composite photocatalyst
  • a cevo <sub>4</sub> -la <sub>2</sub> o <sub>3</sub> Preparation method and application of @hnts composite photocatalyst
  • a cevo <sub>4</sub> -la <sub>2</sub> o <sub>3</sub> Preparation method and application of @hnts composite photocatalyst

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] (1)La2 o 3 Precursor preparation:

[0032] Weigh 0.8662g La(NO 3 ) 3 ·6H 2 Put O (lanthanum nitrate hexahydrate) into a glass beaker, add 20 mL of deionized water to dissolve it completely, stir magnetically in a water bath at 85°C, then add 0.72 g of urea, and adjust the pH to 10 with 1M NaOH solution to produce a white precipitate. Stirring was continued for 2h. The resulting suspension was poured into a 50ml reaction kettle and heated at 180°C for 24h. After washing, centrifuging and drying, put the obtained precursor in a muffle furnace for calcination at 750°C for 2 hours, and wait for it to cool naturally to room temperature and take it out to obtain La 2 o 3 Precursor.

[0033] (2) CeVO 4 -La 2 o 3 Preparation of @HNTs composite photocatalyst:

[0034] Weigh 0.0292g NH 4 VO 3 (Ammonium metavanadate) and 0.1085g Ce(NO 3 ) 3 ·6H 2 O (cerium nitrate hexahydrate) was put into 1M NaOH solution and 1M HNO 3 In the solution, add 1.5g halloysite nanotube...

Embodiment 2

[0038] (1)La 2 o 3 Precursor preparation:

[0039] Weigh 0.8662g La(NO 3 ) 3 ·6H 2 Put O (lanthanum nitrate hexahydrate) into a glass beaker, add 20 mL of deionized water to dissolve it completely, stir magnetically in a water bath at 85°C, then add 0.72 g of urea, and adjust the pH to 10 with 1M NaOH solution to produce a white precipitate. Stirring was continued for 2h. The resulting suspension was poured into a 50ml reaction kettle and heated at 180°C for 24h. After washing, centrifuging and drying, put the obtained precursor in a muffle furnace for calcination at 750°C for 2 hours, and wait for it to cool naturally to room temperature and take it out to obtain La 2 o 3 Precursor.

[0040] (2) CeVO 4 -La 2 o 3 Preparation of @HNTs composite photocatalyst:

[0041] Weigh 0.0584g NH 4 VO 3 (Ammonium metavanadate) and 0.217g Ce(NO 3 ) 3 ·6H 2 O (cerium nitrate hexahydrate) was put into 1M NaOH solution and 1M HNO 3 In the solution, add 1.5g halloysite nanotub...

Embodiment 3

[0045] (1)La 2 o 3 Precursor preparation:

[0046] Weigh 0.8662g La(NO 3 ) 3 ·6H 2 Put O (lanthanum nitrate hexahydrate) into a glass beaker, add 20 mL of deionized water to dissolve it completely, stir magnetically in a water bath at 85°C, then add 0.72 g of urea, and adjust the pH to 10 with 1M NaOH solution to produce a white precipitate. Stirring was continued for 2h. The resulting suspension was poured into a 50ml reaction kettle and heated at 180°C for 24h. After washing, centrifuging and drying, put the obtained precursor in a muffle furnace for calcination at 750°C for 2 hours, and wait for it to cool naturally to room temperature and take it out to obtain La 2 o 3 Precursor.

[0047] (2) CeVO 4 -La 2 o 3 Preparation of @HNTs composite photocatalyst:

[0048] Weigh 0.1169g NH 4 VO 3 (Ammonium metavanadate) and 0.4341g Ce(NO 3 ) 3 ·6H 2 O (cerium nitrate hexahydrate) was put into 1M NaOH solution and 1M HNO 3 In the solution, add 1.5g of halloysite nan...

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Abstract

The invention belongs to the technical field of environmental protection material preparation and provides a CeVO 4 ‑La 2 O 3 @HNTs composite photocatalyst and its preparation method and use. The present invention includes (1) La 2 O 3 Preparation of photocatalyst: Add urea of ​​different qualities to a certain concentration of lanthanum nitrate solution, heat and stir in a water bath, and calcine the product obtained by the hydrothermal reaction at high temperature to obtain the lanthanum oxide precursor; (2) CeVO 4 ‑La 2 O 3 Preparation of @HNTs composite photocatalyst: Using nitric acid solution and sodium hydroxide solution as solvents respectively, in the process of synthesizing cerium vanadate, halloysite and the lanthanum oxide precursor prepared in step (1) are added in sequence, and adjusted during the stirring process The pH of the solution is then poured into a vacuum reactor for hydrothermal reaction. After natural cooling, it is washed and dried in an oven to obtain CeVO 4 ‑La 2 O 3 The @HNTs composite photocatalyst is used to degrade tetracycline in antibiotic wastewater; the preparation method of the present invention is simple, does not cause waste of resources and the formation of secondary pollution, and is a green, environmentally friendly and efficient pollution treatment technology.

Description

technical field [0001] The present invention relates to a CeVO 4 -La 2 o 3 The preparation method and application research of @HNTs composite photocatalyst belong to the field of environmental protection material preparation technology. Background technique [0002] Antibiotics are produced by microorganisms (including bacteria, fungi, actinomycetes) or higher animals and plants in the life and production process, and have selective inhibitory or killing effects on bacteria, mycoplasma, chlamydia, fungi, viruses and other microorganisms. A class of drugs used to prevent and treat microbial infections. Currently widely used antibiotics can be divided into β-lactams, quinolones, tetracyclines, aminoglycosides, macrolides, sulfonamides, etc. according to their chemical structures. In recent years, with the continuous improvement of medical science and technology, antibiotics have been widely used in human medicine and health and animal disease treatment. Since antibiotics ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J23/22B01J35/10C02F1/30C02F101/38C02F101/34
CPCC02F1/30B01J23/002B01J23/22C02F2101/34C02F2101/38C02F2305/10B01J2523/00B01J35/39B01J35/61B01J2523/3706B01J2523/3712B01J2523/55
Inventor 关静茹李金择吴东遥刘重阳王会琴霍鹏伟闫永胜
Owner JIANGSU UNIV
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