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

Preparation method of popcorn-shaped ZnFe2O4/CdS/GO heterojunction photocatalyst

A photocatalyst, znfe2o4 technology, used in physical/chemical process catalysts, chemical instruments and methods, chemical/physical processes, etc., can solve the problems of poor stability, low light conversion efficiency, easy to suffer from photocorrosion, etc. The effect of porous roughness, increasing specific surface area, and improving photocatalytic activity

Inactive Publication Date: 2021-05-28
KUNMING UNIV OF SCI & TECH
View PDF10 Cites 1 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The present invention aims at the problems of CdS photocatalysts in the prior art that the original CdS is easily subjected to photocorrosion due to severe auto-oxidation of photogenerated holes during the photocatalysis process, which not only leads to low photoconversion efficiency, but also leads to poor stability, etc., and provides a Popcorn ZnFe 2 The preparation method of O4/CdS/GO heterojunction photocatalyst, the present invention adopts iron salt a

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 popcorn-shaped ZnFe2O4/CdS/GO heterojunction photocatalyst
  • Preparation method of popcorn-shaped ZnFe2O4/CdS/GO heterojunction photocatalyst
  • Preparation method of popcorn-shaped ZnFe2O4/CdS/GO heterojunction photocatalyst

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] Embodiment 1: A kind of popcorn shape ZnFe 2 o 4 / CdS / GO heterojunction photocatalyst preparation method, the specific steps are as follows:

[0038] (1) Synthetic popcorn-like ZnFe 2 o 4 Magnetic precursor: Add iron salt (ferric chloride or ferric nitrate) and zinc acetate dihydrate to ethylene glycol, and ultrasonically treat it for 30 minutes to obtain solution A. Put solution A at a temperature of 200°C for 12 hours, and separate the solid and liquid , to obtain a single-phase popcorn-like ZnFe 2 o 4 Nanosphere; Wherein the concentration of iron salt in solution A is 0.34mol / L, and the molar ratio of iron salt and zinc acetate is 1:2;

[0039] (2) Synthesis of ZnFe 2 o 4 / CdS heterojunction photocatalyst:

[0040] Step (1) popcorn-like ZnFe 2 o 4 Disperse the nanospheres into a cadmium salt (cadmium sulfate) aqueous solution, shake for 3 hours to obtain a suspension B, separate it with a magnet, and remove the solution to obtain ZnFe that adsorbs cadmium i...

Embodiment 2

[0044] Embodiment 2: A kind of popcorn shape ZnFe 2 o 4 / CdS / GO heterojunction photocatalyst preparation method, the specific steps are as follows:

[0045] (1) Synthetic popcorn-like ZnFe 2 o 4 Magnetic precursor: Add iron salt (ferric chloride) and zinc acetate dihydrate to ethylene glycol, and ultrasonically treat for 30 minutes to obtain solution A. Put solution A at a temperature of 200°C for 12 hours, and separate solid and liquid to obtain a single Popcorn-like ZnFe 2 o 4 Nanosphere; Wherein the concentration of iron salt in solution A is 0.34mol / L, and the molar ratio of iron salt and zinc acetate is 1:2;

[0046] (2) Synthesis of ZnFe 2 o 4 / CdS heterojunction photocatalyst:

[0047] Step (1) popcorn-like ZnFe 2 o 4 Disperse the nanospheres into a cadmium salt (cadmium sulfate) aqueous solution, shake for 3 hours to obtain a suspension B, separate it with a magnet, and remove the solution to obtain ZnFe that adsorbs cadmium ions 2 o 4 Nanospheres, ZnFe tha...

Embodiment 3

[0050] Embodiment 3: A kind of popcorn shape ZnFe 2 o 4 / CdS / GO heterojunction photocatalyst preparation method, the specific steps are as follows:

[0051] (1) Synthetic popcorn-like ZnFe 2 o 4 Magnetic precursor: Add iron salt (ferric chloride) and zinc acetate dihydrate to ethylene glycol, and ultrasonically treat for 30 minutes to obtain solution A. Put solution A at a temperature of 200°C for 12 hours, and separate solid and liquid to obtain a single Popcorn-like ZnFe 2 o 4 Nanosphere; Wherein the concentration of iron salt in solution A is 0.34mol / L, and the molar ratio of iron salt and zinc acetate is 1:2;

[0052] (2) Synthesis of ZnFe 2 o 4 / CdS heterojunction photocatalyst:

[0053] 1) Step (1) popcorn-like ZnFe 2 o 4 Disperse the nanospheres into a cadmium salt (cadmium sulfate) aqueous solution, shake for 3 hours to obtain a suspension B, separate it with a magnet, and remove the solution to obtain ZnFe that adsorbs cadmium ions 2 o 4 Nanospheres, ZnFe ...

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
Concentrationaaaaaaaaaa
Login to View More

Abstract

The invention relates to a preparation method of a popcorn-shaped ZnFe2O4/CdS/GO heterojunction photocatalyst, and belongs to the technical field of nano-catalysts. According to the preparation method, a popcorn-shaped ZnFe2O4 nanosphere is hydrothermally synthesized by adopting ferric salt and zinc acetate dihydrate, by taking the popcorn-shaped ZnFe2O4 nanosphere as a substrate, cadmium ion adsorption and sulfuration treatment are circularly conducted to obtain a ZnFe2O4/CdS heterojunction photocatalyst, and hydrothermal reaction is conducted on the ZnFe2O4/CdS heterojunction photocatalyst and graphene oxide to obtain the popcorn-shaped ZnFe2O4/CdS/GO heterojunction photocatalyst. The catalyst disclosed by the invention shows efficient catalytic capability on organic pollutants such as dyes in industrial wastewater, is convenient to recycle and has stable cycle performance. The preparation method is cheap and green, and the ZnFe2O4/CdS/GO heterojunction photocatalyst has a good application prospect.

Description

technical field [0001] The invention relates to a popcorn-shaped ZnFe 2 o 4 The invention discloses a preparation method of / CdS / GO heterojunction photocatalyst, which belongs to the technical field of nano catalysts. Background technique [0002] Due to the small size and high surface energy of nanomaterials, the use of traditional separation methods, such as centrifugation and filtration, always results in severe loss of catalyst and high energy consumption. In addition, if these photocatalyst powders cannot be completely recovered and separated, the remaining samples will cause secondary pollution, which is quite different from the original purpose. Therefore, it is very important to manufacture photocatalysts with good recyclability. Magnetic separation technology overcomes these problems by introducing magnetic materials into the catalyst to form magnetic photocatalysts. The magnetic separation technique utilizing an external magnetic field provides a convenient and ...

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
IPC IPC(8): B01J27/043B01J35/10
CPCB01J27/043B01J35/004B01J35/1004
Inventor 李绍元陶继尧马文会吴鉴苗志超刘琳王飞于洁万小涵魏奎先伍继君
Owner KUNMING UNIV OF SCI & TECH