Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

CdS@ZnCr-LDHs heterojunction nanomaterial for photocatalytic degradation of tetracycline as well as preparation method and application thereof

A nano-material and tetracycline technology, applied in chemical instruments and methods, physical/chemical process catalysts, metal/metal oxide/metal hydroxide catalysts, etc., can solve problems such as easy recombination of CdS, photocorrosion, and constraints, and achieve Effect of improving photocatalytic performance, strong thermal stability and photochemical stability

Pending Publication Date: 2021-11-02
ZHEJIANG UNIV OF TECH
View PDF2 Cites 1 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

CdS has a band gap suitable for visible light absorption (Eg = 2.4eV), and the synthesis is simple and cheap, but the photocatalytic activity of pure CdS is easy to recombine due to photogenerated carriers and vacancies, and CdS is prone to photocorrosion under light irradiation. being constrained

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • CdS@ZnCr-LDHs heterojunction nanomaterial for photocatalytic degradation of tetracycline as well as preparation method and application thereof
  • CdS@ZnCr-LDHs heterojunction nanomaterial for photocatalytic degradation of tetracycline as well as preparation method and application thereof
  • CdS@ZnCr-LDHs heterojunction nanomaterial for photocatalytic degradation of tetracycline as well as preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1Z

[0020] The synthesis of embodiment 1ZnCr-LDHs material

[0021] The details are as follows: under nitrogen protection atmosphere, 0.075mol (22.31g) Zn(NO 3 ) 2 ·6H 2 O and 0.025mol (10.00g) Cr(NO 3 ) 3 9H 2 O was dissolved in 100ml deionized water to prepare solution A. Solution B is 1M sodium hydroxide solution. In a three-necked flask with 50ml of deionized water, the liquid in the three-necked flask was stirred at room temperature (rotating speed was 200r / min), and solution A and solution B were all dripped drop by drop in the three-necked flask, and the three-necked flask was controlled. The pH value of the internal mixture is 9.0-9.5. After the solution A is added dropwise within 30 minutes, the dropwise addition of solution B is also stopped. The resulting mixture was crystallized at 65 °C for 24 h, centrifuged and washed until neutral, and dried in a vacuum at 85 °C for 12 h to finally obtain the sample ZnCr-NO 3 -LDHs, recorded as ZnCr-LDHs material.

Embodiment 2

[0022] The synthesis of embodiment 2CdS

[0023] The details are as follows: the synthesis of CdS by hydrothermal method mainly uses Cd(NO 3 ) 2 4H 2 O, thiourea and ethylenediamine are raw materials, and the synthesis process is as follows: at room temperature, 0.0197mol (6.0768g) Cd(NO 3 ) 2 4H 2 The thiourea of ​​0 and 0.0591mol (4.5g) is dissolved in 60ml ethylenediamine, stirs and transfers in the 100ml polytetrafluoroethylene reactor, airtight polytetrafluoroethylene reactor, then the polytetrafluoroethylene reactor is transferred to React in a vacuum oven at 160°C for 48 hours, then cool naturally to room temperature, centrifuge the yellow precipitate in the reaction solution, wash the yellow precipitate twice with deionized water and ethanol, and dry at 65°C for 10 hours to obtain nano-CdS products .

Embodiment 3

[0024] Synthesis of Example 3CdS@ZnCr-LDHs composite material

[0025] In the synthesis of CdS@ZnCr-LDHs materials, overboiling water was used to avoid affecting the dissolved carbon dioxide, as follows: 0.007mol (100mg) cadmium sulfide (CdS), 0.0147mol (4.373g) Zn(NO 3 ) 2 ·6H 2 O, 0.0049mol (1.961g) Cr(NO 3) 3 9H 2 O, and 0.037mol (2.248g) of urea were dissolved in 100ml of deionized water, the resulting solution was ultrasonically treated for 15min, and then stirred for 30min to disperse the reaction system evenly. Transfer the above solution to a polytetrafluoroethylene reaction kettle, seal the polytetrafluoroethylene reaction kettle, then place the polytetrafluoroethylene reaction kettle in a 95°C oven for 12 hours to react, take it out, cool it down to room temperature naturally, and put the reaction The solution was centrifuged, and the obtained precipitated solid was washed twice with deionized water and absolute ethanol, respectively. After vacuum drying at 50 ...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

The invention discloses a CdS@ZnCr-LDHs heterojunction nanomaterial for photocatalytic degradation of tetracycline and a preparation method and application thereof, the CdS@ZnCr-LDHs heterojunction nanomaterial is a composite material formed by growing zinc-chromium hydrotalcite on a CdS nanorod carrier which is used as a carrier, the chemical general formula of the zinc-chromium hydrotalcite in the composite material is [Zn < 2 + > <1-x>Cr < 3 + ><x> (OH)<2>] (CO<3> < 2->) <x / 2>. mH<2>O], wherein the molar ratio of Zn < 2 + > to [Cr < 3 + >] is (1-x): x, 0.2 < = x < = 0.33, m is the number of crystal water, and 2 < = m < = 6. The zinc-chromium hydrotalcite and cadmium sulfide composite material is used for catalytically degrading tetracycline in wastewater, the reaction condition is mild, the tetracycline removal rate is high, and the catalytically degraded composite material is easy to recycle.

Description

technical field [0001] The invention relates to a CdS@ZnCr-LDHs heterojunction nanomaterial for photocatalytic degradation of tetracycline, a preparation method and application thereof. Background technique [0002] Antibiotics are a class of secondary metabolites with antimicrobial or other activities produced by microorganisms such as bacteria, fungi, and actinomycetes, or higher animals and plants during their life activities. Tetracycline antibiotics (Tetracylines, hereinafter referred to as TC) are widely used in antibiotics. In recent years, with the continuous growth of population and rapid economic development, China has become the world's largest producer and consumer of antibiotics. The inappropriate use or even abuse of tetracycline antibiotics in medicine and animal husbandry has led to the Entering the water environment, it poses an increasingly serious threat to environmental security, ecosystems and human health. Traditional methods of dealing with tetracycl...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/26B01J27/04B01J27/047B01J35/00C02F1/30C02F101/38
CPCB01J27/04B01J27/047B01J23/26C02F1/30C02F2101/38C02F2305/10B01J35/39
Inventor 夏盛杰戴甜甜张冠华倪哲明
Owner ZHEJIANG UNIV OF TECH
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com