Eureka AIR delivers breakthrough ideas for toughest innovation challenges, trusted by R&D personnel around the world.

Efficient composite photocatalyst α-fe in response to visible light 2 o 3 /in 2 the s 3 preparation method

A technology of -fe2o3 and composite light, applied in chemical instruments and methods, physical/chemical process catalysts, chemical/physical processes, etc., can solve problems such as poor separation, low conduction band position, and low photocatalytic activity

Active Publication Date: 2021-04-27
YANGTZE UNIVERSITY
View PDF10 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] However, since hematite (α-Fe 2 o 3 ) conduction band position is too low, not enough to reduce oxygen, so that the recombination probability of photogenerated carriers is high, and the separation is poor, making its photocatalytic activity low

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
  • Efficient composite photocatalyst α-fe in response to visible light  <sub>2</sub> o  <sub>3</sub> /in  <sub>2</sub> the s  <sub>3</sub> preparation method
  • Efficient composite photocatalyst α-fe in response to visible light  <sub>2</sub> o  <sub>3</sub> /in  <sub>2</sub> the s  <sub>3</sub> preparation method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] High-efficiency composite photocatalyst α-Fe responsive to visible light of the present invention 2 o 3 / In 2 S 3 The preparation method comprises the steps of: weighing 0.003mol α-Fe prepared by hydrothermal method 2 o 3 Nanoparticles, drop 10mL molar concentration of indium nitrate solution (wherein, n(α-Fe 2 o 3 ): n(In(NO 3 ) 3 ·5H 2 (2)=9:2), ultrasonic 15min disperses evenly, then slowly drips 20mL molar concentration under stirring and is the sodium sulfide solution of 0.083mol / L (wherein, n(In(NO 3 ) 3 ·5H 2 O): n(Na 2 S)=1:2.5) into the above suspension, the pH value of the solid suspension was maintained at 3, and then it was transferred to an autoclave and placed in an oven at 180°C for aging for 24h. The obtained solid phase was washed with water until neutral, dried at 60°C for 5 hours, and ground for later use to obtain α-Fe 2 o 3 / In 2 S 3 composite photocatalyst.

[0031] Among them, α-Fe 2 o 3 The preparation method of nanoparticle co...

Embodiment 2

[0033] High-efficiency composite photocatalyst α-Fe responsive to visible light of the present invention 2 o 3 / In 2 S 3 The preparation method comprises the steps of: weighing 0.0032mol α-Fe prepared by hydrothermal method 2 o 3 Nanoparticles, drop 5mL molar concentration of 0.0067mol / L indium nitrate solution (wherein, n(α-Fe 2 o 3 ): n(In(NO 3 ) 3 ·5H 2 (2)=19:2), ultrasonic 15min disperses evenly, then slowly drips 20mL of sodium sulfide solution (wherein, n(In(NO 3 ) 3 ·5H 2 O):n(Na 2 S)=1:2.5) into the above suspension, the pH value of the solid suspension was maintained at 3, and then it was transferred to an autoclave and placed in an oven at 180°C for aging for 24 hours. The obtained solid phase was washed with water until neutral, dried at 60°C for 5 hours, and ground for later use to obtain α-Fe 2 o 3 / In 2 S 3 composite photocatalyst.

[0034] Among them, α-Fe 2 o 3 The preparation method of nanoparticle comprises the steps: get 16.16g Fe(NO 3 )...

Embodiment 3

[0036] High-efficiency composite photocatalyst α-Fe responsive to visible light of the present invention 2 o 3 / In 2 S 3 The preparation method comprises the steps of: weighing 0.0028mol α-Fe prepared by hydrothermal method 2 o 3 Nanoparticles, drop 15mL molar concentration of 0.0067mol / L indium nitrate solution (wherein, n(α-Fe 2 o 3 ):n(In(NO 3 ) 3 ·5H 2 (2)=17:6), ultrasonic 15min disperses evenly, then slowly drips 20mL molar concentration of 0.125mol / L sodium sulfide solution under stirring (wherein, n(In(NO 3 ) 3 ·5H 2 O):n(Na 2 S)=1:2.5) into the above suspension, the pH value of the solid suspension was maintained at 3, and then it was transferred to an autoclave and placed in an oven at 180°C for aging for 24 hours. The obtained solid phase was washed with water until neutral, dried at 60°C for 5 hours, and ground for later use to obtain α-Fe 2 o 3 / In 2 S 3 composite photocatalyst.

[0037] Among them, α-Fe 2 o 3 The preparation method of nanoparti...

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
particle diameteraaaaaaaaaa
band gapaaaaaaaaaa
Login to View More

Abstract

The invention discloses a high-efficiency composite photocatalyst α-Fe responsive to visible light 2 o 3 / In 2 S 3 A preparation method comprising the steps of: 1) α-Fe 2 o 3 The nanoparticles are mixed with the trivalent indium salt solution and then ultrasonically dispersed to form a uniform solid suspension; 2) aging reaction: add sodium sulfide solution dropwise to the solid suspension obtained in step 1) for complete reaction, and then transfer it to 3) drying and grinding: washing the solid phase obtained in step 2) until neutral, then drying and grinding in sequence. The preparation method of the invention not only broadens the absorption of visible light, but also can effectively inhibit charge recombination, has higher photocatalytic activity, and is beneficial to the degradation of organic matter.

Description

technical field [0001] The invention relates to the technical field of photocatalysts, in particular to a high-efficiency composite photocatalyst α-Fe responsive to visible light 2 o 3 / In 2 S 3 method of preparation. Background technique [0002] Hematite (α-Fe 2 o 3 ) is a visible light-responsive semiconductor with a band gap of 0.28-2.48eV. Compared with other photocatalysts, α-Fe 2 o 3 The preparation conditions are mild, the process is simple, and it has the advantages of low price, non-toxicity, and abundant natural reserves. α-Fe 2 o 3 It is an environmentally friendly material, so it has many applications in the field of environmental restoration, such as photocatalytic degradation of organic dyes, organic acids, and aldehydes. [0003] However, since hematite (α-Fe 2 o 3 )'s conduction band position is too low to reduce oxygen, so that the recombination probability of photogenerated carriers is high, and the separation is poor, resulting in low photocat...

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): B01J27/043B01J35/00
CPCB01J27/043B01J35/004
Inventor 张英蒋阮经段帅张秀宇彭波
Owner YANGTZE UNIVERSITY
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Eureka Blog
Learn More
PatSnap group products