TiO2 photocatalyst and preparation method thereof

A photocatalyst and catalyst technology, applied in chemical instruments and methods, physical/chemical process catalysts, chemical/physical processes, etc., can solve the problems of high cost and difficult preparation of activated carbon fibers, and achieve increased contact reaction opportunities, combined with The effect of high intensity and strong enrichment ability

Active Publication Date: 2013-04-17
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In addition, the preparation of activated carbon fibers is difficult and relatively expensive

Method used

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  • TiO2 photocatalyst and preparation method thereof
  • TiO2 photocatalyst and preparation method thereof
  • TiO2 photocatalyst and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] Porous carbon materials were prepared using glucose as carbon precursor. Glucose was dissolved in distilled water successively, so that the concentration of the glucose aqueous solution was 15 wt%, and the solution was shaken. Immerse 1 gram of MCM-22 zeolite with a particle size of about 3 μm in 20 ml of glucose solution for 20 minutes, then pour out the excess liquid, and use filter paper to suck up the solution that cannot be poured out. The mixture was placed in an oven at 65°C for 3 hours, then slowly raised to 130°C for 5 hours. During the heating and constant temperature process, with the evaporation of water, the colorless glucose solution gradually polymerized and carbonized, and finally turned into a black C / MCM-22 complex. To increase the filling rate, repeat the above steps 3 times. Finally the complex was placed in N 2Under the protection of the atmosphere, the temperature was raised to 800° C. and kept at a constant temperature for 12 hours. After natu...

Embodiment 2

[0037] Porous carbon materials were prepared by using water-soluble phenolic resin as carbon precursor. A water-soluble phenolic resin solution with a concentration of 7wt% was prepared, and 1 g of calcined MCM-22 zeolite with a particle size of about 5 μm was immersed in 20 mL of the water-soluble phenolic resin solution. After the adsorption was saturated, the excess liquid was poured out. The mixture was placed in an oven at a constant temperature of 80°C for 2 hours, then slowly raised to 150°C and kept at a constant temperature for 2 hours. To increase the filling rate, repeat the above steps 3 times. Finally the complex was placed in N 2 Under the atmosphere, the temperature was raised to 900° C., and the temperature was kept constant for 6 hours. After naturally cooling to room temperature, the carbonized material was soaked in 20wt% HF solution for 24 hours. Then wash with distilled water and filter until the pH value of the washing solution is close to neutral. Fi...

Embodiment 3

[0041] Porous carbon was prepared from furfuryl alcohol. Disperse 3mL of furfuryl alcohol evenly in 10mL of ethanol, impregnate 1 gram of calcined MCM-22 zeolite with a particle size of about 10μm in 20mL of the above solution, after the adsorption is saturated, then pour out the excess liquid. The mixture was placed in an oven and the temperature was directly raised to 100° C. for 6 hours without segmenting. To increase the filling rate, repeat the above steps once. Finally the complex was placed in N 2 Under the atmosphere, the temperature was raised to 1000° C., and the temperature was kept constant for 1 hour. After the complex was naturally cooled to room temperature, the complex was soaked with 30wt% NaOH solution to remove MCM-22, and then washed with distilled water and filtered until the pH of the washing solution was close to neutral. Finally, the sample was dried to obtain a porous carbon material, named C3, and the relevant properties are listed in Table 1.

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Abstract

The invention discloses a TiO2 photocatalyst and a preparation method thereof. The TiO2 photocatalyst is a supported catalyst which takes porous carbon as a supporter, wherein the porous carbon is prepared by taking MCM-11 zeolite as a template. The preparation method of the TiO2 photocatalyst comprises the steps of: filling the MCM-11 zeolite with a precursor solution containing carbon, carrying out high-temperature carbonization to remove the template to prepare the porous carbon supporter, then supporting a TiO2 precursor on the porous carbon supporter in a form of sol, and preparing the TiO2 photocatalyst by baking. The obtained TiO2 photocatalyst contains 5wt%-60wt% of TiO2. The TiO2 photocatalyst is easy to separate and recycle and has high enrichment capacity for organic matters and good mass transfer effect because more external surface of the photocatalyst is exposed; and the efficiency of photocatalytic degradation to the organic matters is high.

Description

technical field [0001] The present invention relates to a kind of TiO 2 Photocatalyst and preparation method thereof, specifically, relate to a kind of porous carbon material as the loaded TiO2 of carrier 2 A photocatalyst and a preparation method thereof belong to the field of inorganic material preparation. Background technique [0002] With the rapid development of petrochemical production, the resulting water pollution is becoming more and more serious. Contaminated wastewater contains a large number of organic pollutants that are difficult to biodegrade, and their biological toxicity is relatively high, which seriously threatens human health and life. Therefore, eliminating organic pollutants in water and improving environmental conditions are major issues that human beings are currently facing. [0003] Photocatalytic degradation of organic pollutants is currently widely studied and environmentally friendly sewage purification technology. It has the characteristics ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J21/18B01J35/10C02F1/30
Inventor 杨卫亚王少军沈智奇凌凤香王丽华季洪海郭长友孙万付
Owner CHINA PETROLEUM & CHEM CORP
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