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Application of ionic liquid (diethylamine formate) in photo degradation of methylene blue dye

A technology of diethylamine formate and diethylamine formate, which is applied in the application field of ionic liquid diethylamine formate in the photodegradation of methylene blue dye, and can solve environmental hazards, biological toxicity, application restrictions, etc. problem, to achieve the effect of accelerating the degradation rate, high photocatalytic efficiency and low cost

Active Publication Date: 2018-10-23
QINGDAO UNIV OF SCI & TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

But it also has its limitations, such as TiO 2 and CdS have high catalytic activity, TiO 2 It has a large forbidden band width, its value is 3.2Ev, it can only absorb ultraviolet light with a wavelength of 300-400nm, it cannot effectively use solar energy, and its photocatalysis or energy conversion efficiency is low, which limits its application; Unstable when irradiated, photoanodic corrosion produces Cd 2+ , toxic to organisms, harmful to the environment

Method used

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  • Application of ionic liquid (diethylamine formate) in photo degradation of methylene blue dye
  • Application of ionic liquid (diethylamine formate) in photo degradation of methylene blue dye
  • Application of ionic liquid (diethylamine formate) in photo degradation of methylene blue dye

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Embodiment 1

[0026] The preparation method of ionic liquid diethylamine formate is prepared by using formic acid and diethylamine to carry out acid-base neutralization reaction, and the reaction formula is as follows:

[0027]

[0028] The preparation method of described a kind of ionic liquid diethylamine formate, comprises the following steps:

[0029] (1) mix formic acid and water in a volume ratio of 1:1; (2) under 200rpm magnetic stirring, add the diluted formic acid dropwise to equimolar diethylamine (in order to make the reaction fully, diethylamine Slightly excessive);

[0030] (3) After the dropwise addition, continue to stir and react for 2 hours to make the reaction complete and obtain the crude product, which contains a large amount of water (may contain unreacted diethylamine);

[0031] (4) Use a rotary evaporator to steam most of the water in the crude product until no droplets condense, put the above-mentioned crude product into a rotary evaporator to remove water, then ...

Embodiment 2

[0035] The rate of self-degradation of methylene blue aqueous solution is very slow under visible light irradiation, adding DEAF can accelerate the degradation of methylene blue. The greater the volume content of DEAF, the greater the degradation rate; the lower the concentration of MB, the greater the degradation rate and the shorter the degradation time, which can be completed within 3 minutes at the shortest.

[0036] Prepare an aqueous methylene blue solution with a concentration of 200mg / L, which is referred to as solution A.

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Abstract

The invention discloses an application of an ionic liquid (diethylamine formate) in the photo degradation of a methylene blue dye. Under the irradiation of visible light, the degradation of a methylene blue water solution is slow, and the degradation speed of methylene blue is largely accelerated after the ionic liquid (diethylamine formate) is added. The ionic liquid is a green solvent and will not pollute the environment. A carrier can be modified or hybridized by the ionic liquid with catalytic activity to prepare a visible light solid catalyst with high efficiency.

Description

technical field [0001] The invention relates to the technical field of photocatalytic degradation of dyes, in particular to the application of ionic liquid diethylamine formate in the photodegradation of methylene blue dyes. Background technique [0002] Photocatalytic degradation of dyes is a newly developed energy-saving, green and environmentally friendly new technological means in recent years. It plays an important role in the treatment of organic pollutants in wastewater and harmful substances in the air. But it also has its limitations, such as TiO 2 and CdS have high catalytic activity, TiO 2 It has a large forbidden band width, its value is 3.2Ev, it can only absorb ultraviolet light with a wavelength of 300-400nm, it cannot effectively use solar energy, and its photocatalysis or energy conversion efficiency is low, which limits its application; Unstable when irradiated, photoanodic corrosion produces Cd 2+ , is toxic to organisms and harmful to the environment. ...

Claims

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Application Information

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IPC IPC(8): B01J31/04C02F1/30C02F101/36C02F101/38
CPCC02F1/30B01J31/0279C02F2101/308C02F2101/36C02F2101/40C02F2101/38C02F2305/10B01J35/39
Inventor 徐洁赵军宋加欣王锐侯万国
Owner QINGDAO UNIV OF SCI & TECH
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