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Supported photocatalyst for treating liquid methylene blue pollutant and its prepn process and application

A methylene blue liquid, photocatalyst technology, applied in physical/chemical process catalysts, chemical instruments and methods, light water/sewage treatment, etc. Firmness and other problems, to achieve the effect of improving photocatalytic efficiency, high activity, and simple preparation process

Inactive Publication Date: 2007-06-06
CHINA UNIV OF PETROLEUM (EAST CHINA)
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Since activated carbon is generally in the form of granular and powder, most of the complexes with titanium dioxide still maintain the original form of activated carbon, and its separation and recovery process is relatively complicated, and it is easy to wear and pulverize during application.
At the same time, the titanium dioxide powder is not firmly fixed, and it is easy to enter the solution and become a suspension system

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] Example 1: Weigh 1.200g of epoxy resin, fully dissolve it in 48ml of acetone, and then put 3.600g of titanium dioxide powder (P25) into the above solution under the condition of shear dispersion for dispersion. Stir for 1 hour at a rotational speed of 5000 rpm / min to form a uniformly dispersed milky white slurry. Take by weighing 4.820g viscose-based fiber activated carbon (BET specific surface area is 1200m 2 / g, the total pore volume is 0.45cm 3 / g; soaked and washed in distilled water, dried at 120°C for 4 hours), immersed in the uniformly dispersed titanium dioxide suspension, taken out after 15 minutes, dried in vacuum at 60°C for 5 hours, then transferred to a carbonization furnace, nitrogen Calcined at 470° C. for 2 hours in an atmosphere, and cooled naturally to room temperature to obtain a supported photocatalyst (also called a supported photocatalyst) for treating methylene blue liquid phase pollutants. Take 2.500g of the prepared photocatalyst, cut it into ...

Embodiment 2

[0031] Example 2: Weigh 1.200g of epoxy resin, fully dissolve it in 48ml of acetone, and then put 5.000g of titanium dioxide powder (P25) into the above solution under the condition of shear dispersion for dispersion. Stir for 1 hour at a rotational speed of 6000 rpm / min to form a uniformly dispersed milky white slurry. Take by weighing 4.820g viscose-based fiber activated carbon (BET specific surface area is 1500m 2 / g, the total pore volume is 0.65cm 3 / g; soaked and washed in distilled water, dried at 120°C for 4 hours), immersed in the uniformly dispersed titanium dioxide suspension, taken out after 15 minutes, dried in vacuum at 60°C for 5 hours, then transferred to a carbonization furnace, nitrogen Calcined at 500°C for 2 hours under the atmosphere, and cooled naturally to room temperature to obtain the supported photocatalyst. Take 2.500g of the prepared photocatalyst, cut it into 5 pieces of about the same size, then hang it with a wire and distribute it evenly in th...

Embodiment 3

[0032] Example 3: Weigh 1.500g of epoxy resin, fully dissolve it in 45ml of acetone, and then put 3.000g of titanium dioxide powder (P25) into the above solution under the condition of shear dispersion for dispersion. Stir for 1 hour at a rotational speed of 7000 rpm / min to form a uniformly dispersed milky white slurry. Take by weighing 4.820g polyacrylonitrile-based fiber activated carbon (BET specific surface area is 800m 2 / g, the total pore volume is 0.35cm 3 / g; soaked and washed in distilled water, dried at 110°C for 2 hours), immersed in the above uniformly dispersed titanium dioxide suspension, taken out after 30 minutes, dried in vacuum at 80°C for 3 hours, then transferred to a carbonization furnace, nitrogen Calcined at 550° C. for 2 hours under atmosphere, and cooled naturally to room temperature to obtain a supported photocatalyst. Take 2.500g of the prepared photocatalyst, cut it into 5 pieces of about the same size, then hang it with a wire and distribute it e...

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PUM

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Abstract

The present invention relates to one kind of supported photocatalyst and its preparation process and application. The technological scheme is that the supported photocatalyst for treating liquid methylene blue pollutant is prepared fixing nanometer TiO2 powder onto the surface of active carbon fiber with resin as adhesive and the subsequent calcining in nitrogen atmosphere to obtain the supported photocatalyst adhered with the residue. The supported photocatalyst has TiO2 supporting amount of 25-55 wt% and calcining temperature of 400-550 deg.c. Under illumination of ultraviolet ray, the supported photocatalyst can eliminate methylene blue and other organic pollutant from water solution in the degradation efficiency up to 99 % and basically unchanged circularly using efficiency.

Description

technical field [0001] The invention relates to a loaded photocatalyst, a preparation method and an application method thereof, in particular to a loaded photocatalyst for treating methylene blue liquid phase pollutants, a preparation method and an application method. Background technique [0002] The control and treatment of environmental pollution is a major issue that human society is facing and expecting to solve. Due to the discharge of waste water from modern industries to the surrounding water bodies, the available water resources are becoming less and less, and these waste water generally contain toxic and harmful chemical substances, which threaten the healthy growth of humans and other organisms. Therefore, the treatment of typical liquid-phase pollutants such as methylene blues has attracted the attention of many researchers. [0003] Among many environmental pollution control technologies, the heterogeneous photocatalytic process using semiconductor oxides as ca...

Claims

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Application Information

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IPC IPC(8): B01J21/06B01J21/18C02F1/32
Inventor 郑经堂叶智刚员汝胜赵玉翠张玉贞曲险峰刘颖石建稳张延宗关荣波
Owner CHINA UNIV OF PETROLEUM (EAST CHINA)
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