Low temperature process of preparing carbon-doped mesoporous TiO2 visible light catalyst

A mesoporous titanium dioxide, photocatalyst technology, applied in physical/chemical process catalysts, chemical instruments and methods, chemical/physical processes, etc., can solve problems such as no patent reports, achieve uniform pore size distribution, high photocatalytic activity, The effect of easy process

Inactive Publication Date: 2006-11-08
HUAZHONG NORMAL UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] So far, there is no patent report on the synthesis of carbon-doped mesoporous titanium dioxide visible light photocatalyst under low temperature conditions

Method used

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  • Low temperature process of preparing carbon-doped mesoporous TiO2 visible light catalyst
  • Low temperature process of preparing carbon-doped mesoporous TiO2 visible light catalyst

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] Step 1, prepare a mixed solution of 100 milliliters of water and ethanol, wherein the volume ratio of alcohol and water is 1:1;

[0033] Step 2, add hydrochloric acid or ammoniacal liquor to the solution of step 1 to adjust the pH value of the solution to 1, then add the surfactant polyethylene glycol to a content of 0.4 g / L in the solution, add complexing agent citric acid to a content of 0.4 g / L in the solution 0.08 g / L, add 0.01 g of starch;

[0034] Step 3, adding 10 grams of tetrabutyl titanate to the prepared solution in step 2;

[0035] Step 4, performing solvent heat treatment on the solution prepared in step 3, the heat treatment temperature is 100°C, and the time is 36 hours;

[0036] Step 5, after the end of step 4, the solid product is filtered, and the product is rinsed with distilled water several times;

[0037] Step 6. Dry the product of step 5 at 60° C. for 12 hours under vacuum conditions to obtain a gray carbon-doped mesoporous titanium dioxide visi...

Embodiment 2

[0039] Step 1. Add hydrochloric acid or ammonia water in 100 milliliters of water to adjust the pH value of the solution to 1, then add surfactant polyethylene glycol to a content of 0.4 g / L in the solution, and add complexing agent citric acid to a content of 0.08 in the solution g / L, add 0.01 g of starch;

[0040] Step 2, adding 10 grams of tetrabutyl titanate to the prepared solution in step 1;

[0041] Step 3, performing hydrothermal treatment on the solution prepared in step 2, the temperature is 100°C, and the time is 20 hours;

[0042] Step 4. After step 3 is finished, the solid product is filtered, and the product is rinsed with distilled water or ethanol several times;

[0043] Step 5. Dry the product of step 4 at 60° C. for 12 hours under vacuum conditions to obtain a gray carbon-doped mesoporous titanium dioxide visible light photocatalyst.

Embodiment 3

[0045] Step 1, prepare a mixed solution of 100 milliliters of water and ethanol, wherein the volume ratio of alcohol and water is 1:1;

[0046] Step 2, adding hydrochloric acid or ammonia water to the above solution to adjust the pH value of the solution to 1, then adding surfactant polyethylene glycol to a content of 0.4 g / L in the solution, adding complexing agent citric acid to a content of 0.08 in the solution g / L, add 0.04 g of starch;

[0047] Step 3, adding 10 grams of tetrabutyl titanate to the prepared solution in step 2;

[0048] In step 4, solvent heat treatment is performed on the solution prepared in step 3 at a temperature of 100° C. for 36 hours;

[0049] Step 5. After step 4 is completed, the solid product is filtered, and the product is rinsed with distilled water or ethanol several times;

[0050]Step 6. Dry the product of step 5 at 50° C. for 12 hours under vacuum conditions to obtain a gray carbon-doped mesoporous titanium dioxide visible light photocatal...

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PUM

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Abstract

The present invention relates to preparation process of carbon-doped mesoporous TiO2 visible light catalyst, and belongs to the field of nanometer catalyst material technology. The present invention features that amorphous titania powder prepared with titanium containing compound through hydrolysis and used as the titanium source and saccharide compound as carbon source are produced into the carbon-doped mesoporous TiO2 visible light catalyst through heat treatment in water or solvent, suction filtering, washing and drying. The carbon-doped mesoporous TiO2 visible light catalyst has specific surface area up to 126 sq m / g, homogeneous pore size of about 8 nm, high visible light catalytic activity, simple synthesis path and easy control of the technological process.

Description

technical field [0001] The invention relates to a low-temperature preparation method of a carbon-doped mesoporous titanium dioxide visible light photocatalyst, belonging to the field of nanometer photocatalytic materials. Background technique [0002] Semiconductor nano-titanium dioxide has become an ideal material for solving energy and environmental problems because of its stable chemical properties, non-toxicity and effective removal of pollutants in the atmosphere and water. Titanium dioxide has a wide range of uses. It can photocatalytically degrade a variety of organic pollutants into non-toxic small molecular compounds, such as water, carbon dioxide, inorganic acids, etc., and photolyze water into hydrogen and oxygen to obtain hydrogen energy; effectively convert solar energy into chemical energy. . However, titanium dioxide is a semiconductor compound with a wide band gap (Eg=3.2eV), and only sunlight with a shorter wavelength (λ≤387 nanometers) can be absorbed, and...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J21/06B01J21/18
Inventor 张礼知任文杰艾智慧贾法龙
Owner HUAZHONG NORMAL UNIV
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