Preparation method of heme-doped titanium dioxide photocatalyst

A titanium dioxide, photocatalyst technology, applied in physical/chemical process catalysts, chemical instruments and methods, organic compound/hydride/coordination complex catalysts, etc., can solve problems such as low photocatalytic efficiency

Inactive Publication Date: 2017-05-31
王天玮
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Problems solved by technology

[0003] The present invention designs a preparation method of a heme-doped titanium dioxide photocatalyst, which solves the technic

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  • Preparation method of heme-doped titanium dioxide photocatalyst

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[0016] The preparation process of titanium dioxide photocatalyst of the present invention is as follows:

[0017] (1) Take 10ml of deionized water and 3ml of glacial acetic acid and mix them with 30ml of absolute ethanol;

[0018] (2) Mix 15ml of isopropyl titanate with 60ml of absolute ethanol;

[0019] (3) Slowly drop the mixture in step 2 into step 1;

[0020] (4) Add 75 mg of heme solution dissolved in 15 ml of ammonia;

[0021] (5) Ultrasound for 10 minutes after stirring evenly;

[0022] (6) React in a hydrothermal reactor at 150°C for 8 hours;

[0023] (7) The mixture is filtered, and washed twice with absolute ethanol and deionized water;

[0024] (8) Dry in a vacuum oven at 45°C for 18 hours;

[0025] (9) Grinding the solid.

[0026] The catalytic efficiency of the titanium dioxide photocatalyst was tested by degrading the rhodamine b solution. After 2 hours, the degradation rate reached 84.2%. At the same time, the degradation efficiency of p25 was only 49.9%. ...

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Abstract

The invention provides a preparation method of a heme-doped titanium dioxide photocatalyst. The preparation method includes the steps of: 1) preparing a solution A from deionized water, glacial acetic acid and anhydrous ethanol; 2) preparing a solution B with isopropyl titanate and anhydrous ethanol; 3) adding the solution B to the solution A with stirring; 4) adding heme, which is dissolved in a 10-time diluent of concentrated ammonia water; 5) uniformly stirring the solution and performing ultrasonic treatment for 10 min; 6) adding the mixture in the step 5) into a hydrothermal kettle and performing a reaction for 8 h at 150 DEG C; 7) performing suction filtration to the mixture in the step 6) and cleaning the mixture for two times respectively with anhydrous ethanol and deionized water; 8) drying the mixture in a vacuum drying box at 45 DEG C for 18 h; and 9) grinding the solid to prepare the heme-doped titanium dioxide photocatalyst. A degradation test with a rhodamine B solution proves that the photocatalyst is significantly improved in catalytic efficiency. The photocatalyst has huge application prospect in the field of photocatalytic degradation of organic pollutants.

Description

technical field [0001] The invention relates to a preparation method of heme-doped titanium dioxide photocatalyst. Background technique [0002] Titanium dioxide has great application potential in the photocatalytic degradation of organic pollutants due to its strong oxidizing ability, non-toxicity, and strong corrosion resistance. However, the photoresponse range of titanium dioxide is narrow, and the photocatalytic efficiency is low. largely depends on the doping of the photocatalyst. In the doping preparation process of titanium dioxide photocatalyst, the doping and preparation conditions of the catalyst are very important. The preparation process affects the effect of photocatalytic degradation in the later stage, and the doping composition of the catalyst greatly affects the photocatalytic efficiency and the visible light. utilization rate. Contents of the invention [0003] The invention designs a preparation method of a heme-doped titanium dioxide photocatalyst, w...

Claims

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Application Information

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IPC IPC(8): B01J31/38C02F1/30
Inventor 王天玮
Owner 王天玮
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