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

Preparation method of Ce2S3/TiO2 nanosheet composite photocatalyst

A technology of nanosheets and composites, applied in the direction of physical/chemical process catalysts, chemical instruments and methods, chemical/physical processes, etc., can solve the problem of reducing the photocatalytic performance of zinc oxide, rapid decay of photocatalytic performance, and reduced photocatalytic performance and other problems, to achieve significant photocatalytic performance, low overall cost, and simple preparation methods

Inactive Publication Date: 2019-07-23
NANCHANG HANGKONG UNIVERSITY
View PDF7 Cites 14 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to its inherent defects, its application in reality is limited.
Titanium dioxide is a wide-bandgap semiconductor that can only absorb ultraviolet light, and the energy of ultraviolet light accounts for only 4% of the energy of sunlight, so the utilization rate of titanium dioxide for sunlight is very low; at the same time, ultraviolet light excites semiconductors to generate photogenerated electrons-holes Yes, photogenerated electrons and holes interact with organic pollutants attached to titanium dioxide, degrading them into water and carbon dioxide, but the recombination rate of photogenerated electrons and holes is much greater than the rate of interaction with organic matter, which greatly reduces oxidation Zinc Photocatalytic Performance
However, due to its less photogenerated electron-hole pairs, its photocatalytic performance decays rapidly
Titanium dioxide is a very mature photocatalyst with high photocatalytic performance and a large number of photogenerated electron-hole pairs on the surface, which can provide a large number of individual electrons and holes for dicerium trisulfide, but its photogenerated electron-hole pairs The recombination speed is much greater than the electron transfer speed, resulting in the reduction of photocatalytic performance

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
  • Preparation method of Ce2S3/TiO2 nanosheet composite photocatalyst
  • Preparation method of Ce2S3/TiO2 nanosheet composite photocatalyst
  • Preparation method of Ce2S3/TiO2 nanosheet composite photocatalyst

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] (1) Synthesis of Ce 2 S 3 Nanosheets

[0027] Dissolve 4.34g (about 0.01mol) of cerium nitrate hexahydrate in 50ml of deionized water to obtain solution A, add 6.3g (about 0.1mol) of thioacetamide to solution A, stir evenly by magnetic force, and then centrifuge. The resulting filter cake was centrifuged with deionized water for 2-3 times, placed in an electric blast drying oven, kept at 60°C for 2 hours, and then naturally cooled to room temperature to obtain Ce 2 S 3 Precursor. The precursor was put into a tube furnace and calcined for 10 hours at 300 °C under the protection of nitrogen to obtain the product Ce 2 S 3 Nanosheets.

[0028] (2) Synthesis of Ce 2 S 3 / TiO 2 Nanosheet Composite Photocatalyst

[0029] Weigh 0.138g (about 0.0017mol) TiO 2 Add it into deionized water, put it into an ultrasonic disperser and carry out ultrasonic dispersion for 30min, and the Ce obtained in step (1) 2 S 3 The nanosheets were poured into the reaction kettle together...

Embodiment 2

[0031] (1) Synthesis of Ce 2 S 3 Nanosheets

[0032] 4.34g (about 0.01mol) of cerium nitrate hexahydrate was dissolved in 100ml of deionized water to obtain solution A, 6.3g (about 0.1mol) of thioacetamide was added to solution A, stirred evenly by magnetic force, and then treated by centrifugation, The resulting filter cake was centrifuged with deionized water for 2-3 times, placed in an electric blast drying oven, kept at 60°C for 2 hours, and then naturally cooled to room temperature to obtain Ce 2 S 3 Precursor. The precursor was put into a tube furnace and calcined for 10 hours at 300 °C under the protection of nitrogen to obtain the product Ce 2 S 3 Nanosheets.

[0033] (2) Synthesis of Ce 2 S 3 / TiO 2 Nanosheet Composite Photocatalyst

[0034] Weigh 0.07g (about 0.00087mol) of TiO 2 Add it into deionized water, put it into an ultrasonic disperser and carry out ultrasonic dispersion for 30min, and the Ce obtained in step (1) 2 S 3 The nanosheets were poured ...

Embodiment 3

[0036] Using the degradation of rhodamine B under visible light as a model reaction, the effect of the composite on the photocatalytic activity was observed, and the Ce 2 S 3 / TiO 2 The nanosheet composite is applied to the degradation of organic pollutants.

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 relates to a preparation method of a Ce2S3 / TiO2 nanosheet composite. According to the method, a small amount of titanium dioxide is doped into cerium sesquisulphide to obtain a cheap andefficient photocatalyst, and specifically, the Ce2S3 / TiO2 nanosheet composite is prepared from titanium dioxide, cerium nitrate hexahydrate and thioacetamide through a hydrothermal method and a calcination reaction. The Ce2S3 / TiO2 nanosheet composite involved in the invention is capable of rapidly degrading organic pollutant, especially dye organic pollutant in wastewater into pollution-free substances such as H2O and CO2 under normal temperature, normal pressure and illumination, and has lasting photocatalytic activity.

Description

technical field [0001] The present invention relates to a Ce 2 S 3 / TiO 2 The invention relates to a preparation method of a nanosheet composite (titanium dioxide nanosheet-cerium trisulfide nanosheet composite), belonging to the technical field of photocatalysts. Background technique [0002] Water pollution is one of the main pollutions of the environment, especially the organic matter pollution in water bodies. Organic pollutants have high toxicity, high environmental release rate, and wide impact. Due to their wide variety and considerable production and use, they have brought great harm to human health and the environment. Organic pollutants have caused soil quality to decline, water quality to be polluted, food pollutant residues to exceed the standard, and have brought great damage to the environment. The main sources of water pollution in my country are industrial wastewater, agricultural wastewater and urban domestic sewage, and the main pollutants in these wast...

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): B01J27/04C02F1/30C02F101/38C02F101/30
CPCB01J27/04C02F1/30C02F2305/10C02F2101/38C02F2101/30B01J35/39
Inventor 颜恩彦谢宇漆国江辛浩李澈蒋振坚吴俊唐薇
Owner NANCHANG HANGKONG UNIVERSITY
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