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Plasma photocatalytic material and preparation method thereof as well as application of plasma photocatalytic material in preparation of aniline

A photocatalytic material and plasma technology, which is applied in the fields of energy science and catalytic science, can solve problems such as poor chemical activity, poor aniline conversion rate and selectivity, and poor catalytic performance, and achieve low equipment requirements, low price, and safety high effect

Active Publication Date: 2021-06-15
SHANDONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, after research by the inventors, it was found that plasma metal (Au) has poor chemical activity, poor catalytic performance for hydrogen donors, and poor conversion and selectivity of catalyzing the hydrogenation of nitrobenzene to prepare aniline under light.

Method used

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  • Plasma photocatalytic material and preparation method thereof as well as application of plasma photocatalytic material in preparation of aniline
  • Plasma photocatalytic material and preparation method thereof as well as application of plasma photocatalytic material in preparation of aniline
  • Plasma photocatalytic material and preparation method thereof as well as application of plasma photocatalytic material in preparation of aniline

Examples

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preparation example Construction

[0037] Another embodiment of the present invention provides a method for preparing a plasma photocatalytic material, the steps are as follows:

[0038] adding chloroauric acid to cetyltrimethylammonium bromide solution, and then adding sodium borohydride for reduction to obtain a seed solution;

[0039] Adding silver nitrate, chloroauric acid and ascorbic acid successively to the solution of cetyltrimethylammonium bromide and bromosalicylic acid to obtain a growth solution;

[0040] mixing the seed solution and the growth solution, and growing at 26-28°C to obtain gold nanorods;

[0041] Adding ascorbic acid, palladium chloride and hydrochloric acid to the gold nanorod solution, and growing it at 29-31°C to prepare a plasma photocatalytic material;

[0042] Wherein, the mass ratio of the volume of the seed solution to the cetyltrimethylammonium bromide in the growth solution is 1:10-15, mL:g, and the volume of the seed solution is 0.15-0.20% of the volume of the growth soluti...

Embodiment 1

[0068] A Pd-Au plasma photocatalytic material (Pd-tipped Au NRs) coated with palladium at both ends and a preparation method thereof, comprising the steps of:

[0069] (1) Preparation of gold nanorods by seed crystal method:

[0070] Preparation of seed solution: Add chloroauric acid (250 μL, 0.01M) and sodium borohydride (600 μL, 0.01M) to cetyltrimethylammonium bromide solution (CTAB, 10 mL, 0.1M) in sequence, Stir for two minutes, then stand still for 30min to obtain the seed solution (the concentration of gold nanoparticles is ~2.3×10 -3 mol / L).

[0071] Preparation of growth solution: CTAB (3.6 g) and bromosalicylic acid (0.44 g) were weighed and dissolved in 100 mL of hot water at 50°C. Silver nitrate (1.90 mL, 0.01 M) was then added to the mixed solution. After standing still for 15 min, chloroauric acid solution (100 mL, 1 mM) was added and stirred slightly for 15 min. Then ascorbic acid (510 μL, 0.1 M) was added, and the mixture was continuously stirred until the ...

Embodiment 2

[0075] In this example, a Pd-Au plasma photocatalytic material (Pd-covered Au NRs) fully covered with palladium was prepared. The preparation method was the same as in Example 1, except that the surfactant in the growth solution in step (1) was changed to 7.288 g CTAB.

[0076] From figure 2 It can be seen that the surface of gold nanorods is covered by a layer of metal palladium.

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Abstract

The invention discloses a plasma photocatalytic material and a preparation method thereof as well as application of the plasma photocatalytic material in preparation of aniline. The plasma photocatalytic material comprises a gold nanorod, wherein two ends of the gold nanorod are coated with metal palladium. The preparation method comprises the following steps: preparing a seed solution and preparing a growth solution; mixing the seed solution and the growth solution, and conducting growing at 26-28 DEG C to obtain the gold nanorod; and adding ascorbic acid, palladium chloride and hydrochloric acid into a gold nanorod solution, and conducting growing at 29-31 DEG C to obtain the plasma photocatalytic material, wherein a ratio of the volume of the seed solution to the mass of hexadecyl trimethyl ammonium bromide in the growth solution is 1: (10-15), mL: g, and the volume of the seed solution is 0.15-0.20% of the volume of the growth solution. The plasma photocatalytic material provided by the invention simultaneously has excellent light absorption capacity and catalytic activity, and shows obvious advantages on nitrobenzene conversion, including improved selectivity, improved reaction rate and mild reaction conditions.

Description

technical field [0001] The invention belongs to the fields of energy science and catalysis science, and relates to a plasma photocatalytic material, a preparation method and an application in preparing aniline. Background technique [0002] The information disclosed in this background section is only intended to increase the understanding of the general background of the present invention, and is not necessarily taken as an acknowledgment or any form of suggestion that the information constitutes the prior art already known to those skilled in the art. [0003] As an important chemical and chemical intermediate, aniline is widely used in the synthesis of high value-added products such as dyes, agricultural chemicals and other fine chemicals. However, the currently used chemical reduction method uses stoichiometric strong reducing agents such as sodium bisulfite, iron, Zn, etc., and the product selectivity is poor, and will cause serious environmental problems and energy wast...

Claims

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Application Information

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IPC IPC(8): B01J23/52C07C209/36C07C211/46
CPCB01J23/52C07C209/325B01J35/39C07C211/46
Inventor 郑昭科仝凤霞黄柏标王泽岩刘媛媛王朋张晓阳程合锋张倩倩
Owner SHANDONG UNIV
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