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

Zinc-cadmium-sulfur-bismuth-doped halloysite composite photocatalyst and preparation method thereof

A composite light and catalyst technology, applied in chemical instruments and methods, physical/chemical process catalysts, chemical/physical processes, etc., can solve problems such as agglomeration of zinc, cadmium, and sulfur nanocrystals, and achieve abundant resources, excellent catalytic performance, and pretreatment. Simple way to effect

Active Publication Date: 2022-06-28
NANJING UNIV OF SCI & TECH
View PDF6 Cites 2 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The above modification methods all use natural silicate as the carrier, and do not make halloysite participate in the photocatalytic reaction as a photocatalyst, and at the same time, there is agglomeration phenomenon in the preparation of a single zinc cadmium sulfur nanocrystal

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
  • Zinc-cadmium-sulfur-bismuth-doped halloysite composite photocatalyst and preparation method thereof
  • Zinc-cadmium-sulfur-bismuth-doped halloysite composite photocatalyst and preparation method thereof
  • Zinc-cadmium-sulfur-bismuth-doped halloysite composite photocatalyst and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] In the first step, 1.5 mmol halloysite (258 g / mol) was mixed with saturated aluminum chloride solution, ultrasonically dispersed for 10 min, and then placed on a magnetic stirrer and stirred for 0.5 h;

[0030] In the second step, take 0.3mmol of bismuth nitrate pentahydrate (1:5 molar ratio with halloysite) and disperse it in 5mL of ethylene glycol solution and ultrasonically for 10min;

[0031] In the third step, the solution obtained in the second step was added dropwise to the suspension obtained in the first step and transferred to a 100 mL polytetrafluoroethylene reaction kettle, and then taken out after being solvothermally heated in an oven at 180 °C for 24 hours;

[0032] In the fourth step, the sample in the third step is centrifugally washed, and dried in an oven at 60° C. for 12 hours to obtain a modified bismuth-doped halloysite nanomaterial.

[0033] figure 2 are the optical images of the unmodified halloysite nanotubes (A) prepared in Example 1 and the ...

Embodiment 2

[0035] In the first step, 100 mg of bismuth-doped halloysite was dispersed in 50 mL of deionized water, and ultrasonically dispersed for more than 30 minutes;

[0036] In the second step, quantitatively add 0.8mmol of cadmium acetate dihydrate and 0.2mmol of zinc acetate dihydrate (mol ratio 8:2) to the solution obtained in the first step, and ultrasonically stir for more than 1h;

[0037] In the third step, 1 mmol of thioacetamide was added to the solution obtained in the second step, and ultrasonic mechanical stirring was performed for 2 h;

[0038]In the fourth step, the samples in the third step were centrifuged and washed, and dried in an oven at 60° C. for 12 hours to obtain a zinc-cadmium-sulfur-bismuth-doped halloysite composite material (named ZCS / Bi-HNT-1).

Embodiment 3

[0040] In the first step, 20 mg of zinc-cadmium-sulfur-bismuth-doped halloysite was dispersed in 50 mL of 10 mg / L Rhodamine B solution, and stirred in a dark room for 1 h;

[0041] In the second step, the suspension obtained in the first step is placed under a 300W xenon lamp (λ>420nm) for illumination, and 3 mL of liquid is placed at an interval of 10 minutes;

[0042] In the third step, the liquid sample obtained in the second step was centrifuged at 9000 r / min for 1 min to remove the catalyst;

[0043] In the fourth step, the centrifuged liquid obtained in the third step is detected in an ultraviolet-visible spectrophotometer to evaluate the photocatalytic performance.

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 zinc cadmium sulfur-bismuth doped halloysite composite photocatalyst and a preparation method thereof. In the zinc-cadmium-sulfur-bismuth-doped halloysite composite photocatalyst, the halloysite has a nanotube structure, and the zinc-cadmium-sulfur is dispersedly grown on the surface of the bismuth-doped halloysite. The invention adopts a one-step solvothermal method to prepare the modified bismuth-doped halloysite, which is ultrasonically compounded with zinc, cadmium and sulfur to form a composite photocatalyst. The zinc-cadmium-sulfur-bismuth-doped halloysite composite photocatalyst of the present invention has good dispersion and many active sites, is used for photocatalytic degradation of 10mg / L rhodamine B, exhibits excellent catalytic performance, and the degradation rate reaches More than 85%.

Description

technical field [0001] The invention relates to a zinc-cadmium-sulfur-bismuth-doped halloysite composite photocatalyst and a preparation method thereof, belonging to the technical field of nanomaterial preparation. Background technique [0002] Photocatalytic technology utilizes the unique light and electrical conversion properties of materials to convert solar energy into chemical energy, obtain energy substances including hydrogen and hydrocarbons, and remove pollutants and bacteria. However, the existing photocatalysts have limited their applications due to their low light utilization rate, high photogenerated electron recombination rate, and few surface active sites. The photocatalytic performance can be improved by modifying the photocatalyst, and the modification methods include noble metal doping, semiconductor compounding, introducing defects or heteroatoms, adding photosensitizers, etc. [0003] Halloysite is a natural clay-like silicate mineral with the advantages...

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 Patents(China)
IPC IPC(8): B01J27/04C02F1/30C02F101/30
CPCB01J27/04B01J35/004C02F1/30C02F2305/10C02F2101/308
Inventor 刘孝恒张敏
Owner NANJING UNIV OF SCI & 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