Unlock instant, AI-driven research and patent intelligence for your innovation.

A kind of amorphous iron vanadate/bismuth vanadate/graphene composite photocatalyst and its preparation method and application

A graphene composite and photocatalyst technology, applied in metal/metal oxide/metal hydroxide catalysts, physical/chemical process catalysts, chemical instruments and methods, etc., can solve the problem of difficult separation of photogenerated carriers and easy recombination Catalytic efficiency, large grain size and other problems, to achieve the effect of improved separation rate, broad application prospects, and increased contact surface

Active Publication Date: 2020-08-07
SOUTH CHINA AGRI UNIV
View PDF5 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, most of the bismuth vanadate-graphene composites reported so far have a regular crystalline structure, and the particle size is mostly between 100 and 200 nm. The specific surface area is small, and its photocatalytic performance still needs to be improved; The crystalline amorphous composite materials generally have the defects of large grain size, poor adsorption capacity, difficult separation of photogenerated carriers, and easy recombination of electron-hole pairs, resulting in low photocatalytic efficiency.

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
  • A kind of amorphous iron vanadate/bismuth vanadate/graphene composite photocatalyst and its preparation method and application
  • A kind of amorphous iron vanadate/bismuth vanadate/graphene composite photocatalyst and its preparation method and application
  • A kind of amorphous iron vanadate/bismuth vanadate/graphene composite photocatalyst and its preparation method and application

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0040] A kind of preparation method of amorphous ferric vanadate / bismuth vanadate / graphene composite photocatalyst, comprises the steps:

[0041] 1. Accurately weigh 1.94g Bi(NO 3 ) 3 • 5H 2 O, add to 80mL glycerol, ultrasonically, disperse for 10min, add 0.032g graphene powder, continue ultrasonically and stir for 10min;

[0042] 2. Accurately weigh 0.94g NH 4 VO 3 , add to 100mL deionized water, heat and stir in a water bath at 80°C until the white powder is completely dissolved;

[0043] 3. Accurately weigh 1.62g Fe(NO 3 ) 3 •9H 2 O, be dissolved in 50mL deionized water, add it in the glycerol solution of bismuth nitrate gained in step 1, after stirring to make it uniform and clear, under magnetic stirring, add the ammonium metavanadate aqueous solution obtained in step 2 dropwise, and then Continue to stir for 20 minutes, adjust the pH value to 6 with ammonia water, and obtain the precursor solution, let it stand at room temperature and age for 1 hour;

[0044] 4....

Embodiment 2

[0047] A kind of preparation method of amorphous ferric vanadate / bismuth vanadate / graphene composite photocatalyst, comprises the steps:

[0048] 1. Accurately weigh 1.94g Bi(NO 3 ) 3 • 5H 2 O, add to 80mL glycerol, ultrasonically, disperse for 10min, add 0.016g graphene powder, continue ultrasonically and stir for 10min;

[0049] 2. Accurately weigh 0.94g NH 4 VO 3 , add to 100mL deionized water, heat and stir in a water bath at 80°C until the white powder is completely dissolved;

[0050] 3. Accurately weigh 1.62g Fe(NO 3 ) 3 •9H 2 O, be dissolved in 50mL deionized water, add it in the glycerol solution of bismuth nitrate gained in step 1, after stirring to make it uniform and clear, under magnetic stirring, add the ammonium metavanadate aqueous solution obtained in step 2 dropwise, and then Continue to stir for 20 minutes, adjust the pH value to 6 with ammonia water, and obtain the precursor solution, let it stand at room temperature and age for 1 hour;

[0051] 4....

Embodiment 3

[0054] A kind of preparation method of amorphous ferric vanadate / bismuth vanadate / graphene composite photocatalyst, comprises the steps:

[0055] 1. Accurately weigh 1.94g Bi(NO 3 ) 3 • 5H 2 O, add to 80mL glycerol, ultrasonically, disperse for 10min, add 0.032g graphene powder, continue ultrasonically and stir for 10min;

[0056] 2. Accurately weigh 1.4g NH 4 VO 3 , add to 100mL deionized water, heat and stir in a water bath at 80°C until the white powder is completely dissolved;

[0057] 3. Accurately weigh 1.62g Fe(NO 3 ) 3 •9H 2 O, be dissolved in 50mL deionized water, add it in the glycerol solution of bismuth nitrate gained in step 1, after stirring to make it uniform and clear, under magnetic stirring, add the ammonium metavanadate aqueous solution obtained in step 2 dropwise, and then Continue to stir for 20 minutes, adjust the pH value to 6 with ammonia water, and obtain the precursor solution, let it stand at room temperature and age for 1 hour;

[0058] 4. ...

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
particle diameteraaaaaaaaaa
volumeaaaaaaaaaa
Login to View More

Abstract

The invention belongs to the technical field of nanocomposite materials, and specifically discloses an amorphous iron vanadate / bismuth vanadate / graphene composite photocatalyst and its preparation method and application. The steps of the preparation method are as follows: mix bismuth nitrate glycerol solution, graphene powder, ammonium metavanadate aqueous solution and ferric nitrate solution to obtain a precursor solution, perform a hydrothermal reaction, add ascorbic acid solution and allow to stand still under the protection of inert gas. Place, wash alternately with absolute ethanol and deionized water, and obtain an amorphous iron vanadate / bismuth vanadate / graphene composite photocatalyst after drying. The particle size of the amorphous iron vanadate / bismuth vanadate / graphene composite photocatalyst prepared by the above method is less than 50nm, has a large specific surface area, and its photocatalytic activity is far more than that of pure bismuth vanadate or iron vanadate. It can be used for photocatalytic reduction of Cr(VI) and advanced treatment of chromium-containing wastewater, and has broad application prospects.

Description

technical field [0001] The invention relates to the technical field of nanocomposite materials, in particular to an amorphous iron vanadate / bismuth vanadate / graphene composite photocatalyst and its preparation method and application. Background technique [0002] With the rapid development of the global economy, the problem of environmental pollution has become increasingly prominent, especially heavy metal pollution. Among them, chromium-containing (usually Cr(VI)) organic wastewater pollution mainly comes from industrial pigment wastewater, leather preparation wastewater, electroplating wastewater, etc. This type of wastewater has a low biochemical degree and is difficult to treat. However, the current advanced oxidation technology used Catalysts often only deal with organic pollutants alone, but do not have the ability to deal with heavy metals such as hexavalent chromium. In traditional technology research, semiconductor photocatalysis technology represented by titanium...

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): B01J23/847B01J35/02B82Y20/00B82Y30/00B82Y40/00C02F1/30C02F1/70C02F101/22B01J35/00
CPCB82Y20/00B82Y30/00B82Y40/00C02F1/30C02F1/70B01J23/002B01J23/8472C02F2101/22C02F2305/10B01J35/39B01J35/40B01J35/61
Inventor 黄柱坚戴喜德陈娴叶家而胡志霖
Owner SOUTH CHINA AGRI UNIV