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

Method for preparing TiO2/BiVO4 composite photocatalyst by MH method

A microwave hydrothermal and catalyst technology, which is applied in the direction of physical/chemical process catalysts, chemical instruments and methods, metal/metal oxide/metal hydroxide catalysts, etc., to achieve the effects of short reaction time, inhibition of recombination, and simple process flow

Active Publication Date: 2012-07-18
南通润能机械有限公司
View PDF2 Cites 23 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The present invention uses microwave hydrothermal synthesis technology to rapidly synthesize TiO 2 / BiVO 4 Composite photocatalysts have not been reported yet

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
  • Method for preparing TiO2/BiVO4 composite photocatalyst by MH method
  • Method for preparing TiO2/BiVO4 composite photocatalyst by MH method
  • Method for preparing TiO2/BiVO4 composite photocatalyst by MH method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0016] Step 1: Bi(NO 3 ) 3 ·5H 2 O and (NH 4 ) 2 TiF 6 Dissolve in 20mL of HNO with a concentration of 2mol / L 3 solution, where n Bi : n Ti =1:0.2, stir on a magnetic stirrer for 10-20min, and prepare mother salt solution A;

[0017] Step 2: Add NH 4 VO 3 Dissolve in 20mL NaOH solution with a concentration of 4mol / L, where n Bi : n V = 1: 1 Stir on a magnetic stirrer for 10-20 minutes to prepare mother salt solution B;

[0018] Step 3: mix the mother salt solution A obtained in step 1 and the mother salt solution B obtained in step 2 evenly, stir on a magnetic stirrer for 10-30 minutes, and prepare a precursor solution;

[0019] Step 4: Add the precursor solution into the microwave hydrothermal reaction kettle with a filling ratio of 40-60%, then place the reaction kettle in a microwave-assisted hydrothermal synthesizer, set the reaction temperature at 180-220°C, and hold the time for 60~120min;

[0020] Step 5: After the reaction is completed, cool down, take ou...

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 method for preparing TiO2 / BiVO4 composite photocatalyst by a MH (microwave-hydrothermal) method. The method comprises the steps as follows: Bi(NO3)3 5H2O and (NH4)2TiF6 are resolved in HNO3 to form mother salt solution A, NH4VO3 is resolved in NaOH solution to form mother salt solution B, the mother salt solution A and the mother salt solution B are mixed uniformly to form precursor solution, the precursor solution is placed in a microwave hydrothermal reaction kettle for microwave hydrothermal reaction and is cooled after the reaction is over, and yellow sediment in the reaction kettle is taken out and is washed and dried. According to the invention, TiO2 / BiVO4 powder is synthesized quickly through a microwave-hydrothermal synthesis technology, and the photocatalysis performance of the powder is better because TiO2 particles are carried on the surface of BiVO4 to serve as an electron acceptor, and then compounding of a photon-generated carrier is inhibited, further the photocatalysis efficiency of pure-phase BiVO4 powder can be improved.

Description

technical field [0001] The invention belongs to the field of functional materials and relates to a microwave hydrothermal preparation of TiO 2 / BiVO 4 Method for composite photocatalysts. Background technique [0002] BiVO 4 With its special physical and optical properties, it has been gradually applied to the field of visible light photocatalysis, especially in the photodegradation of water, and has become a new type of visible light degradable water material, which has aroused widespread interest. However, BiVO 4 The electrons generated by photoexcitation in the body are difficult to migrate and easily recombine with holes, which reduces the photon quantum efficiency and visible light activity of the catalyst. [0003] In order to further increase the BiVO 4 The photocatalytic efficiency of two semiconductors with different bandgap widths is recombined, and its complementary properties can enhance charge separation, inhibit electron-hole recombination and expand the p...

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): B01J23/22B01J37/10B01J37/34C02F1/30
Inventor 谈国强魏莎莎
Owner 南通润能机械有限公司
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