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A kind of visible light catalyst and preparation method thereof

A catalyst and visible light technology, which is applied in chemical instruments and methods, physical/chemical process catalysts, chemical/physical processes, etc., can solve the problems of low utilization rate of sunlight and achieve good catalytic effect, low cost and simple process

Inactive Publication Date: 2018-04-13
NORTHWEST UNIVERSITY FOR NATIONALITIES
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although it has been doped or modified, it does not make full use of 95% of the visible light in sunlight to degrade organic pollutants, and the utilization rate of sunlight is very low.

Method used

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  • A kind of visible light catalyst and preparation method thereof
  • A kind of visible light catalyst and preparation method thereof
  • A kind of visible light catalyst and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] 1) Add 20ml of n-butyl titanate, 25ml of absolute ethanol and 3ml of glacial acetic acid into a dry Erlenmeyer flask, and stir on a magnetic stirrer for 30min to obtain light yellow liquid A.

[0030] 2) Add 15ml of absolute ethanol, 2ml of prepared 0.1mol / L chromium nitrate aqueous solution and 1ml of prepared 0.3mol / L thiourea aqueous solution into a dry Erlenmeyer flask, and adjust the pH value with concentrated nitric acid to make it PH= 1. Prepare liquid B.

[0031] 3) Slowly drop liquid B into liquid A with a dropper while increasing the stirring speed of liquid A.

[0032] 4) Weigh 5g of the pretreated activated carbon carrier and pour it into the mixed solution in 3), stir and adsorb for 15 minutes, so that the activated carbon can fully absorb the mixed solution, and then filter under reduced pressure.

[0033] 5) The obtained product was dried in an oven at 80°C for 2h, and then calcined at 400°C for 4h in a nitrogen atmosphere in a muffle furnace. Activated...

Embodiment 2

[0036] In 5) of Example 1, the catalyst was calcined in a muffle furnace at 500°C for 4 hours, and the rest of the steps were the same as in Example 1. The prepared catalyst was catalyzed by visible light for 1 hour, and the degradation rate of methyl orange reached 92%.

Embodiment 3

[0038] In 5) of Example 1, the catalyst was calcined in a muffle furnace at a calcination temperature of 450° C. for 4 h, and the rest of the steps were the same as in Example 1. The prepared catalyst was catalyzed by visible light for 1 hour, and the degradation rate of methyl orange reached 96%.

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Abstract

The invention discloses an activated-carbon-supported titanium dioxide visible-light-induced photocatalyst doped with other elements and a preparation method. The preparation method of the visible-light-induced photocatalyst is different from the traditional method for preparing an activated-carbon-supported titanium dioxide catalyst by using a sol-gel method, and titanium dioxide generation is controlled in a sol stage, gel is not generated, so that quantity, sizes and dispersity of titanium dioxide particles supported on activated carbon are controlled; and high-activity, high-dispersity and small-size titanium dioxide nanoparticles can be prepared. The titanium dioxide nanoparticles of the prepared photocatalyst are uniform and are good in dispersity, and visible-light catalytic activity is quite high.

Description

technical field [0001] The invention relates to a photocatalyst and a preparation method thereof. Specifically, the invention relates to a titanium dioxide visible light catalyst supported by activated carbon and doped with other elements and a preparation method thereof. Background technique [0002] In recent years, photocatalyst has been called an ideal environmental pollution control technology and clean energy production technology because of its advantages of direct utilization of solar energy, less secondary pollution, mild reaction conditions, and easy operation. However, such research has not yet been widely used. The main reason is that titanium dioxide (anatase type) has a large forbidden band width (3.2eV), the absorption wavelength is less than 380nm, and the absorption band is in the ultraviolet region. There are only about 5% of ultraviolet light in sunlight, if titanium dioxide is directly used as a catalyst, more than 95% of sunlight cannot be effectively u...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J27/047C02F1/30C02F1/58
CPCY02W10/37
Inventor 段志英王志超孙初峰赵连彪王彦斌
Owner NORTHWEST UNIVERSITY FOR NATIONALITIES