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

CeO2 / TiO2 heterojunction nano flower preparation method

A nano-flower and heterojunction technology, applied in the field of photodegradation, can solve the problems of high photo-generated electron-hole recombination probability, poor utilization of sunlight, low quantum efficiency, etc., to achieve enhanced photocatalytic activity, good electron transfer characteristics, The effect of increasing the photoresponse range

Inactive Publication Date: 2015-09-16
宿州学院
View PDF3 Cites 9 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in TiO 2 In the photocatalytic process, there are defects such as low quantum efficiency, poor utilization of sunlight, and high recombination probability of photogenerated electron-hole pairs.

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
  • CeO2 / TiO2 heterojunction nano flower preparation method
  • CeO2 / TiO2 heterojunction nano flower preparation method
  • CeO2 / TiO2 heterojunction nano flower preparation method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] a CeO 2 / TiO 2 The preparation method of heterojunction nanoflowers is characterized in that it comprises the following steps:

[0023] (1) Preparation of TiO 2 Nanoflowers: Add 1ml of isopropyl titanate to 30ml of acetic acid, stir for 30 minutes, transfer to a reaction kettle with a volume of 50ml of polytetrafluoroethylene liner, keep warm at 140°C for 12h in a blast drying oven, and the resulting product is centrifuged Wash, dry in a blast oven at 60°C for 12 hours, collect the obtained samples and put them in an annealing furnace at 500°C for 3 hours to obtain TiO 2 nanoflowers;

[0024] (2) Finished product preparation: take 1mmol of the above-mentioned TiO 2 Mix nanoflowers with 0.03mmol cerium nitrate hexahydrate, disperse them into 40ml deionized water, stir them magnetically for 30min, add ammonia water to adjust the pH value to 10, then transfer the solution to a blast drying oven at 100°C for 12h, and the product is washed with alcohol and Alternately w...

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

PropertyMeasurementUnit
diameteraaaaaaaaaa
diameteraaaaaaaaaa
particle sizeaaaaaaaaaa
Login to View More

Abstract

The present invention discloses a CeO2 / TiO2 heterojunction nano flower preparation method. TiO2 nano flower is prepared by hydrothermal reaction of isopropyl titanate as a raw material and acetic acid as a solvent, a TiO2 nano flower sample is dispersed in deionized water, and an appropriate amount of cerium nitrate is added for hydrothermal reaction to prepare CeO2 / TiO2 heterojunction nano flower. The CeO2 / TiO2 heterojunction nano flower structure can broaden TiO2 UV-visible light absorption edge from ultraviolet region to visible region, and improve TiO2 light response range. The photocatalytic activity of the CeO2 / TiO2 heterojunction nano flower can be studied by simulation of sunlight irradiated methyl orange degradation, by comparison of P25 and the TiO2 nanoflower, the CeO2 / TiO2 heterojunction nano flower shows outstanding photocatalytic activity, within 60min, 98% of methyl orange is degraded mainly due to the special heterostructure capable of enhancing the photocatalytic activity.

Description

technical field [0001] The present invention mainly relates to the field of photodegradation, in particular to a CeO 2 / TiO 2 Preparation method of heterojunction nanoflowers. Background technique [0002] TiO 2 As a semiconductor catalytic material with multifunctional properties, it has attracted extensive attention from researchers in the fields of photocatalysis, photoelectric conversion, DSSC and biosensors. It has the advantages of high activity, non-toxic, insoluble, and other advantages. Organic pollutants show bright application prospects. However, in TiO 2 In the photocatalytic process, there are defects such as low quantum efficiency, poor utilization of sunlight, and high recombination probability of photogenerated electron-hole pairs. In order to improve its photocatalytic activity and make full use of sunlight, it is usually necessary to treat TiO 2 Modification, such as noble metal modification, ion doping, compound semiconductor modification, and dye se...

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): B01J23/10
Inventor 许海峰
Owner 宿州学院
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