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Photoelectrocatalytic hydrogen production and nitro-aromatic in-situ hydrogenation integrated device and application

A technology of photoelectric catalysis and nitroaromatics, which is applied in electrodes, electrolytic components, electrolytic processes, etc., can solve the problems of difficult contact between nitroaromatic molecules and H radicals, and the difficulty in regulating the rate of H radicals, so as to improve the efficiency of photoelectric catalysis , promote effective separation, and promote the effect of directional migration

Pending Publication Date: 2022-04-29
SHANXI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The present invention aims to solve the problems of difficulty in contacting nitroaromatic molecules with H free radicals and difficult control of the rate of H free radicals produced by photocatalysis in the oil-water mixed system of catalytic hydrogenation reaction of nitroaromatics in the prior art. A photoelectric catalytic composite membrane device that can use water as a hydrogen source to realize a series of reaction devices and applications for photocatalytic hydrogen production and in-situ nitroaromatic hydrogenation reaction

Method used

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  • Photoelectrocatalytic hydrogen production and nitro-aromatic in-situ hydrogenation integrated device and application
  • Photoelectrocatalytic hydrogen production and nitro-aromatic in-situ hydrogenation integrated device and application
  • Photoelectrocatalytic hydrogen production and nitro-aromatic in-situ hydrogenation integrated device and application

Examples

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Comparison scheme
Effect test

Embodiment 1

[0029] like figure 1 As shown, an integrated device for photoelectric catalytic hydrogen production and in-situ hydrogenation of nitroaromatics, including a reactor, a photoelectric catalytic composite membrane, a cathode, an anode, a light source and a DC power supply; the photoelectric catalytic composite membrane is set in the reactor , the reactor is divided into an anode chamber and a cathode chamber, the cathode and anode are respectively arranged in the cathode chamber and the anode chamber, the positive pole and the negative pole of the DC power supply are respectively connected with the anode and the cathode, and the light source is arranged above the cathode chamber ;

[0030] The photoelectrocatalytic composite membrane is composed of a bipolar membrane and a hydrophobic membrane loaded with a photocatalyst on the surface, the bipolar membrane is composed of an anion exchange membrane and a cation exchange membrane, the anode chamber is an aqueous electrolyte soluti...

Embodiment 2

[0040] Different from Example 1 is the preparation method of the photocatalytic composite film, the specific steps are as follows:

[0041] (1) After mixing polypyrrolidone and quaternary ammonium polysulfone with a mass ratio of 2:1, pour it into a beaker, add an aqueous solution of acetic acid with a mass fraction of 0.02%, stir continuously in a constant temperature water bath at 50°C, and add glutaraldehyde after completely dissolving, Continue to stir for 1 hour, after standing still for defoaming, cast on a flat and clean glass plate with a frame, put it into a blast drying oven to dry, and obtain an anion exchange membrane;

[0042] (2) Mix polyvinylpyrrolidone and phosphocellulose with equal mass and pour it into a beaker, add deionized water under stirring, heat to 60°C to dissolve, and add CaCl after it is completely dissolved 2 Solution, continue to stir for 1h, after static defoaming, cast on the surface of the anion exchange membrane prepared above to obtain a cat...

Embodiment 3

[0046] Different from Example 1 is the preparation method of the photocatalytic composite film, the specific steps are as follows:

[0047] (1) Mix polyphenylene ether and polyimide with a mass ratio of 3:1 and pour them into a beaker, add acetic acid aqueous solution with a mass fraction of 0.03%, stir continuously in a constant temperature water bath at 60°C, and add pentane after completely dissolving Dialdehyde, continue to stir for 1.5h, after static degassing, cast on a flat and clean glass plate with a frame, put it into a blast drying oven and dry it to obtain an anion exchange membrane;

[0048] (2) Mix polyvinylpyrrolidone and sulfonic acid fibers of equal mass and pour them into a beaker, add deionized water while stirring, heat to 70°C to dissolve, and add CaCl after completely dissolved 2 The solution was continuously stirred for 1 hour, and after standing for defoaming, it was cast on the surface of the anion exchange membrane prepared above to obtain a cation ex...

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Abstract

The invention belongs to the field of nitro-aromatic hydrogenation, and particularly relates to a photoelectrocatalytic hydrogen production and nitro-aromatic in-situ hydrogenation integrated device and application. In order to solve the problems that in an oil-water mixing system of catalytic hydrogenation reaction of nitro-aromatic hydrocarbon, contact between nitro-aromatic hydrocarbon molecules and H free radicals is difficult, and the rate of the H free radicals generated by photocatalysis is difficult to regulate and control, the invention provides a device containing a photoelectrocatalysis composite membrane. The invention relates to a serial reaction device for realizing photoelectrocatalytic hydrogen production and in-situ nitro-aromatic catalytic hydrogenation reaction. The device comprises a photoelectrocatalysis composite membrane, an anode chamber, a cathode chamber, an anode and a cathode, wherein the anode chamber and the cathode chamber are divided by the photoelectrocatalysis composite membrane. A photoelectrocatalysis composite membrane is used as a diaphragm of an anode chamber and a cathode chamber, an electrolyte aqueous solution is added into the anode chamber, a nitro-aromatic hydrocarbon organic solution is added into the cathode chamber, and a photoelectrocatalysis nitro-aromatic hydrocarbon catalytic hydrogenation reaction is carried out under xenon lamp illumination and external voltage.

Description

technical field [0001] The invention belongs to the field of hydrogenation of nitroaromatics, and in particular relates to an integrated device for photoelectric catalytic hydrogen production and in-situ hydrogenation of nitroaromatics and its application. Background technique [0002] Aromatic amines are raw materials and intermediates for the synthesis of many industrial products, and play an important role in the fields of medicine, pesticides, and dyes. The reduction of nitroaromatics to the corresponding aromatic amines is a mild and efficient method. However, in the current hydrogenation reduction reaction system, H 2 As a hydrogen source, it needs to be carried out under high temperature and high pressure, which has great safety hazards and high energy consumption. There are also some reports using NH 3 BH 3 , HCOOH, NaBH 4 , Alcohols, alkanes, etc. are used as hydrogen sources, but the cost is often high, and by-products are produced, which is easy to cause envi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C25B1/04C25B3/21C25B9/23C25B11/093C25B13/08
CPCC25B1/04C25B3/21C25B11/093C25B9/23C25B13/08
Inventor 韩艳娇
Owner SHANXI UNIV
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