Method for preparing doped mesoporous titanium photocatalyst

A mesoporous titanium dioxide, photocatalyst technology, applied in catalyst activation/preparation, physical/chemical process catalysts, chemical instruments and methods, etc., can solve the problems of low solar energy utilization, low visible light catalytic efficiency, etc. The effect of improving degradation efficiency and simple preparation method

Inactive Publication Date: 2011-06-01
EAST CHINA NORMAL UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] The invention aims to solve key problems such as low solar energy utilization rate and visible light catalytic efficiency of titanium dioxide photocatalyst, and provides a

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0026] Example 1

[0027] In this example, the undoped titanium dioxide photocatalyst was prepared, and the same preparation conditions and methods as the other examples were used.

[0028] a. Add 1 g of triblock copolymer polyethylene glycol-polypropylene glycol-polyethylene glycol (P 123 ) Mix with 30 mL of absolute ethanol and stir for 3 hours to make P 123 Dissolve completely in ethanol, then add 11.3 g of butyl titanate dropwise, and continue to stir for 40 min to obtain a uniform transparent yellow solution;

[0029] b. Mix 1.8 mL of water with 2 mL of inhibitor glacial acetic acid and 5 mL of absolute ethanol;

[0030] c. Add b to a dropwise and mix it evenly under stirring; then pour it into a petri dish and induce a film-like gel through volatilization at room temperature;

[0031] d. The above gel is dried in an oven at 80 ℃ to obtain a dry gel, and then calcined at 500 ℃ for 4 h to obtain a mesoporous titanium dioxide photocatalyst.

[0032] The undoped mesoporous titanium di...

Example Embodiment

[0033] Example 2

[0034] a. Add 1 g of triblock copolymer polyethylene glycol-polypropylene glycol-polyethylene glycol (P 123 ) Mix with 30 mL of absolute ethanol and stir for 3 hours to make P 123 Dissolve completely in ethanol, then add 11.3 g of butyl titanate dropwise, and continue to stir for 40 min to obtain a uniform transparent yellow solution;

[0035] b. Dissolve 0.02 g boric acid in 5 mL absolute ethanol, then add 1.8 mL water and 2 mL inhibitor glacial acetic acid to form a colorless and transparent solution;

[0036] c. Add b to a dropwise and mix it evenly under stirring; then pour it into a petri dish and induce a film-like gel through volatilization at room temperature;

[0037] d. The above gel is dried in an oven at 80 ℃ to obtain a dry gel, and then calcined at 500 ℃ for 4 h to obtain a boron-doped mesoporous titanium dioxide photocatalyst.

[0038] The boron-doped mesoporous titanium dioxide photocatalyst prepared above was reacted, that is, 0.1 g of the photoc...

Example Embodiment

[0039] Example 3

[0040] a, 1 g P 123 Mix with 30 mL of absolute ethanol and stir for 3 h to make P 123 Dissolve completely in ethanol, then add 11.3 g of butyl titanate dropwise, and continue to stir for 40 min to obtain a uniform transparent yellow solution;

[0041] b. Dissolve 0.04 g of boric acid in 5 mL of absolute ethanol, then add 1.8 mL of water and 2 mL of inhibitor acetic acid to form a colorless and transparent solution;

[0042] c. Drop b into a and mix it evenly under stirring; then pour it into a petri dish, and volatilize into a film-like gel at room temperature;

[0043] d. The above gel is dried in an oven at 80 ℃ to obtain a dry gel, and then calcined at 500 ℃ for 4 h to obtain a boron-doped mesoporous titanium dioxide photocatalyst.

[0044] The boron-doped mesoporous titanium dioxide photocatalyst prepared above was reacted, that is, 0.1 g of the photocatalyst, 50 mL of 10 mg / L methylene blue solution was added to the reactor, and the dark reaction was 40 min. The...

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Abstract

The invention discloses a method for preparing doped mesoporous titanium photocatalyst, which is to prepare the doped mesoporous titanium photocatalyst by using triblock copolymer, namely polyethylene glycol-polypropylene glycol-polyethylene glycol(P123), as a template agent, a tetrabutyl titanate as a titanium source, and a boron, nitrogen or tervalent titanium-containing compound as a doping element-containing precursor, synthesizing by a process of evaporation-induced self-assembly at a certain temperature and humidity, drying and roasting. The catalyst prepared by the method has high catalytic activity in visible light and can quickly degrade organic pollutants in dye waste water.

Description

technical field [0001] The invention relates to a preparation method of a photocatalyst, in particular to a preparation method of a doped mesoporous titanium dioxide photocatalyst. The catalyst prepared by the method of the invention can degrade organic pollutants in water under visible light. Background technique [0002] Titanium dioxide is an important inorganic semiconductor functional material, which has the advantages of stable chemical properties, strong oxidation-reduction properties, photocorrosion resistance, non-toxicity, and low cost. It has always been at the core of photocatalytic research. However, its band gap is relatively large (Eg = 3.2eV), and it can only be excited by ultraviolet light with a wavelength less than or equal to 387nm, so the utilization efficiency of solar energy (including 3-5% ultraviolet light) is low. In addition, its photogenerated current carrying son (e - 、h + ) are easy to recombine, and the recombination on the surface of the cat...

Claims

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Application Information

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IPC IPC(8): B01J21/06B01J37/03
Inventor 杨平种彦利
Owner EAST CHINA NORMAL UNIVERSITY
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