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Simple method for enhancing plasmon-driven photochemical decarboxylation reaction

A plasmonic and decarboxylation technology, applied in organic chemistry, energy wastewater treatment, thioether preparation, etc., can solve the problem of short lifespan of plasma metal excited hot carriers, and achieve the promotion of photochemical reaction and enhanced photoreduction. effect of reaction

Active Publication Date: 2022-06-03
NANJING UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The technical problem solved by the present invention is: very effectively solve the problem of short lifetime of hot carriers excited by plasma metal, and effectively promote charge separation

Method used

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  • Simple method for enhancing plasmon-driven photochemical decarboxylation reaction
  • Simple method for enhancing plasmon-driven photochemical decarboxylation reaction
  • Simple method for enhancing plasmon-driven photochemical decarboxylation reaction

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] Example 1. Method principle of asymmetric co-adsorption of p-hydroxythiophenol with electron-withdrawing group to enhance the plasmon-mediated deacidification reaction of p-mercaptobenzoic acid.

[0028] The push-pull electron groups have the mutual attraction of hot electrons. From the perspective of quantum theory, in theory, when an organic molecule has an electron-withdrawing group, it can induce the transfer of electrons, and when an organic molecule has an electron-pushing group, it can inhibit the transfer of electrons (promoting the transfer of holes, due to the average freedom of holes). The distance is very short, so it mainly shows the behavior of negative electric repulsion). And, unlike the band structure of common semiconductors, molecules can be tuned by adding (or removing) substituents or changing substituents. For example, when an organic molecule is changed to change the chargeability of a substituent, the chargeability of the molecule will change. ...

Embodiment 2

[0029] Example 2. Preparation of plasma metal. First use the method of sodium citrate reduction, as attached figure 2 shown. The detailed steps are as follows: the whole experiment is carried out in the dark. First, 30 ml of water was added to a two-necked flask with a capacity of 50 ml, and then the constant temperature magnetic stirrer was adjusted to 120° C. and the rotational speed of 650 rpm for heating. In addition, open the condensate water valve to pass into the cold energy pipe. When the water boils, quickly inject 3ml of 10mM AgNO in the above configuration 3Aqueous solution, quickly cover with tin foil and wait for the second to boil. Immediately after the sub-boiling injection of 1.2 ml of 1% Na by mass 3 Ct aqueous solution. Reaction for 1h. After 1 h, the temperature was turned off, the stirring was continued to be turned on, and the aging was performed in the dark for 40 min.

[0030] The slides were then surface modified (polyvinylpropanolone PVP) to i...

Embodiment 3

[0034] The adsorbed silver nanoparticles are soaked in a mixed ethanol solution of p-fluorothiophenol and p-mercaptobenzoic acid (≥12h), and the two are phase-separated to form the desired asymmetric structure. as attached Image 6 As shown in a, through the contact angle test, it was found that the contact angle of the surface increased from 9° to 38°. In addition, in order to further prove that the asymmetric structure was constructed by phase separation, by placing the asymmetrically adsorbed silver nanoparticles in an oil-water solution, it was found that there was still a layer of silver nanoparticles at the water-oil interface after vibration, which further proved the asymmetric adsorption. Image 6 b shown.

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Abstract

The invention provides a method for asymmetrically adsorbing a molecular cocatalyst with an electron withdrawing group on plasma metal so as to enhance the photo-reduction reaction driven by the plasma metal. In the method, the asymmetric structure only generates phase separation through long-time soaking and adsorption, the raw materials are economical and cheap, and the operation process is simple, convenient and rapid. The method has proved that thiophenol molecules with hydroxyl groups can be adsorbed to enhance the plasmon-driven decarboxylation reaction of p-mercaptobenzoic acid (PMBA). In addition, the method for adsorbing other group molecules further proves that the photocatalytic reaction driven by hot carriers generated by the plasma can be regulated and controlled.

Description

technical field [0001] The invention relates to a very simple method for enhancing ionization driving, in particular to asymmetric regulation of a photochemical reaction driven by hot carriers generated by surface plasmons, and belongs to the technical field of catalytic energy. Background technique [0002] Solar energy is a kind of clean and renewable energy. Effective solar energy collection is one of the important methods to solve the global energy crisis and environmental pollution problems, among which photochemical conversion is an effective way. Initially, semiconductors were often used as photocatalysts for photochemical conversion, but their solar energy utilization efficiency was low due to the large band gap and low stability of semiconductors. In order to improve the utilization of sunlight, plasmonic metal catalysts have become an effective method to solve this problem. Under light excitation, plasmonic metals can generate hot carriers, namely electron-hole pa...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07C319/20C07C321/28
CPCC07C319/20C07C321/28Y02W10/37
Inventor 吕刚朱亚萌
Owner NANJING UNIV OF TECH
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