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

Method for preparing magnetic photocatalyst by use of waste toner

A technology of photocatalyst and toner, applied in the field of preparation of magnetically loaded photocatalysts, can solve the problems of complex preparation process, poor control of conditions, and reduction of TiO2 photocatalytic activity

Inactive Publication Date: 2015-07-01
SHANGHAI UNIV +1
View PDF6 Cites 3 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

But due to the introduction of SiO 2 The transition layer complicates the preparation process, and the conditions are not well controlled, and it will also reduce the TiO 2 photocatalytic activity

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 magnetic photocatalyst by use of waste toner
  • Method for preparing magnetic photocatalyst by use of waste toner
  • Method for preparing magnetic photocatalyst by use of waste toner

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] A. Put the collected waste toner cartridges in the waste toner cartridge crushing and magnetic separation device, and after crushing, magnetic separation, wind separation and other procedures, metal and plastic are obtained in sequence, and finally black organic toner is collected;

[0018] B. Put the waste toner in a sieve, and sieve off the remaining inclusions to obtain a single organic toner;

[0019] C. Conduct a comprehensive thermal analysis of the organic toner to determine the subsequent rotation heating temperature;

[0020] D. The photocatalyst TiO 2 The powder and the organic toner are fully mixed according to the mass ratio of 1:4, and the method of rotating heating is adopted, the rotating speed is 100 r / min, and the temperature is slowly raised to 70 °C, and the temperature is kept for 30 min, so that the TiO 2 Uniformly coated on the surface of the toner to obtain TiO 2 Magnetic photocatalyst.

Embodiment 2

[0022] A. Put the collected waste toner cartridges in the waste toner cartridge crushing and magnetic separation device, and after crushing, magnetic separation, wind separation and other procedures, metal and plastic are obtained in sequence, and finally black organic toner is collected;

[0023] B. Put the waste toner in a sieve, and sieve off the remaining inclusions to obtain a single organic toner;

[0024] C. Conduct a comprehensive thermal analysis of the organic toner to determine the subsequent rotation heating temperature;

[0025] D. The photocatalyst TiO 2 The powder and the organic toner are fully mixed according to the mass ratio of 1:2, and the method of rotating heating is adopted, the rotating speed is 120 r / min, and the temperature is slowly raised to 80 °C, and the temperature is kept for 60 min, so that the TiO 2 Uniformly coated on the surface of the toner to obtain TiO 2 Magnetic photocatalyst.

Embodiment 3

[0027] A. Put the collected waste toner cartridges in the waste toner cartridge crushing and magnetic separation device, and after crushing, magnetic separation, wind separation and other procedures, metal and plastic are obtained in sequence, and finally black organic toner is collected;

[0028] B. Put the waste toner in a sieve, and sieve off the remaining inclusions to obtain a single organic toner;

[0029] C. Conduct a comprehensive thermal analysis of the organic toner to determine the subsequent rotation heating temperature;

[0030] D. The photocatalyst TiO 2 The powder and organic toner are fully mixed according to the mass ratio of 1:1, and the method of rotating and heating is adopted.

[0031]The temperature is 150 r / min, the temperature is slowly raised to 90°C, and the temperature is kept for 90 min, so that the TiO 2 Uniformly coated on the surface of the toner to obtain TiO 2 Magnetic photocatalyst.

[0032] Using X-ray powder diffraction (XRD), Fourier tr...

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
particle diameteraaaaaaaaaa
Login to View More

Abstract

The invention relates to a method for preparing a magnetic photocatalyst by use of waste toner. According to the method, the magnetism of the waste toner and a characteristic that a resin material on the surface of the toner has bonding property at certain temperature are utilized, TiO2 powder is uniformly bonded on the surface of the toner by a rotary heating method, and the TiO2 magnetic photocatalyst is prepared; the TiO2 magnetic photocatalyst is recovered and reutilized easily due to the magnetism of the toner, and SiO2 on the surface of the toner can prevent reduction of photo-catalytic activity caused by diffusion of transition metal ions. According to the method, high temperature treatment is not required, Fe3O4 in the toner is prevented from being converted into alpha-Fe2O3 to lose magnetism, and a phenomenon that the catalytic activity is reduced due to a situation that Fe<2+> diffused in TiO2 is converted into Fe<3+> during high temperature treatment is avoided. The method has simple process, the magnetic photocatalyst can be recycled, and while the waste resource utilization is realized, no secondary pollution is caused in the whole process.

Description

technical field [0001] The invention relates to a preparation method of a magnetic-carrying photocatalyst, in particular to a method for preparing a magnetic-carrying photocatalyst by utilizing waste selenium drum toner. Background technique [0002] Toner cartridges are the main consumables of laser printers and are widely used by institutions, units and home users. As the modern office has higher and higher requirements on the quality and quantity of office accessories (printers, copiers, etc.), the toner cartridges that cannot meet the printing quality and efficiency will be gradually eliminated, and the entire toner cartridge will be scrapped due to the aging of components or the loss of printing function due to wear and tear. According to statistics, my country spends more than 26 billion yuan to purchase printer consumables every year, which become garbage after one-time use. Through treatment, the discarded toner cartridges are separated into metals (iron, aluminum),...

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): B01J31/38
Inventor 程知萱杨桂兴谢丽华史进进姜玲龚允玉陈华徐甲强陆文雄
Owner SHANGHAI UNIV