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Functionalized carbon nitride photocatalyst capable of performing catalytic oxidization on benzene to synthesize phenol

A catalytic oxidation and catalyst technology, applied in organic compound/hydride/coordination complex catalysts, physical/chemical process catalysts, preparation of organic compounds, etc., can solve the problem of reducing the contact area between active sites and reactants, activity and stability To solve the problems of improving performance and stability, etc., to achieve the effect of convenient separation and treatment, strong renewable ability and high practical value

Inactive Publication Date: 2013-07-10
FUZHOU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] At present, most of the phenol production in the industry comes from the three-step cumene process, but it has many unavoidable shortcomings: 1) The production line is long and the process steps are many , atomic utilization is low; 2) there is an intermediate product (cumene peroxide) that is very explosive when it meets heat, acid, and alkali; 3) the by-product acetone that produces the amount of substances such as phenol is the fatal fatality of this route Weakness, severely restricted by acetone market demand; 4) the cumene route needs to consume a large amount of energy to recover unreacted benzene and separate and purify phenol
But it also has many shortcomings, for example, the activity and stability of Fe-g-C3N4 / SBA-15 need to be improved
This may be because part of its active site is covered by the catalyst, which reduces the contact area between the active site and the reactant, thereby reducing the activity.
And the force between Fe-g-C3N4 and the carrier SBA-15 is relatively weak, so its stability needs to be improved

Method used

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  • Functionalized carbon nitride photocatalyst capable of performing catalytic oxidization on benzene to synthesize phenol
  • Functionalized carbon nitride photocatalyst capable of performing catalytic oxidization on benzene to synthesize phenol
  • Functionalized carbon nitride photocatalyst capable of performing catalytic oxidization on benzene to synthesize phenol

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] The first is the preparation of carbon nitride precursor

[0023] Weigh 5g of commercial cyanamide and dissolve it in 12.5g of commercial silica sol (containing 40% 12 nm SiO 2 ), heat and stir at 100°C until dry, and heat the obtained white sample at 500°C for 4h to obtain yellow powder. Add powder to 4M NH 4 HF 2 The solution was stirred for 24 hours to remove the template, filtered, washed with water, washed with ethanol, and dried under vacuum at 80°C to obtain a yellow powdered mesoporous carbon nitride photocatalyst.

[0024] The second is the preparation of functionalized carbon nitride

[0025] Weigh 1g of mesoporous carbon nitride and disperse it in 50ml of absolute ethanol. Add 200ml of anhydrous ethanol solution with 1g of ferrocene formaldehyde and slowly drop it into the above solution through a constant pressure funnel, and then heat and stir at 60°C for 24h. The obtained solid is washed with ethanol several times, and finally dried in vacuum at 80° C. to obtai...

Embodiment 2

[0027] The first is the preparation of carbon nitride precursor

[0028] Weigh 5g commercial cyanamide and dissolve it in 2.5g commercial silica sol (containing 40% 12 nm SiO 2 ), heat and stir at 100°C until dry, and heat the obtained white sample at 600°C for 4h to obtain yellow powder. Add powder to 4M NH 4 HF 2 The solution was stirred for 24 hours to remove the template, filtered, washed with water, washed with ethanol, and dried under vacuum at 80°C to obtain a yellow powdered mesoporous carbon nitride photocatalyst.

[0029] The second is the preparation of functionalized carbon nitride

[0030] Weigh 1g of mesoporous carbon nitride and disperse it in 50ml of absolute ethanol. Add 200ml of anhydrous ethanol solution with 1g of ferrocene formaldehyde and slowly drop it into the above solution through a constant pressure funnel, then heat and stir at 60°C for 12h. The obtained solid is washed with ethanol several times, and finally dried in vacuum at 80°C to obtain a functiona...

Embodiment 3

[0032] The first is the preparation of carbon nitride precursor

[0033] Weigh 5g commercial cyanamide and dissolve it in 2.5g commercial silica sol (containing 40% 12 nm SiO 2 ), heat and stir at 100°C to dryness, and heat the obtained white sample at 700°C for 2h to obtain a yellow powder. Add powder to 4M NH 4 HF 2 The solution was stirred for 24 hours to remove the template, filtered, washed with water, washed with ethanol, and dried under vacuum at 80°C to obtain a yellow powdered mesoporous carbon nitride photocatalyst.

[0034] The second is the preparation of functionalized carbon nitride

[0035] Weigh 1g of mesoporous carbon nitride and disperse it in 50ml of absolute ethanol. Add 200ml of anhydrous ethanol solution with 1g of ferrocene formaldehyde and slowly drop it into the above solution through a constant pressure funnel, then heat and stir at 100°C for 48h. The obtained solid is washed with ethanol several times, and finally dried in vacuum at 80° C. to obtain a fun...

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Abstract

The invention relates to a functionalized carbon nitride photocatalyst capable of performing catalytic oxidization on benzene to synthesize phenol, and a preparation method and applications of the functionalized carbon nitride photocatalyst, belonging to the technical fields of material preparation and organic photosynthesis. The chemical formula of the functionalized carbon nitride photocatalyst is Fc-Ch=N-C3N4. The preparation method comprises the steps of: firstly, performing heat condensation to carbon nitride precursor; and synthesizing the functionalized carbon nitride photocatalyst by adopting a solvent reflux method. The prepared photocatalyst has high specific surface area, and the phenol synthesis by efficient catalytic oxidization on benzene can be realized. The functionalized carbon nitride photocatalyst is simple in technique, low in cost, and high in yield, meets the practical production demand and has larger application potential.

Description

technical field [0001] The invention belongs to the technical field of material preparation and organic photosynthesis, and in particular relates to a functionalized carbon nitride photocatalyst for catalyzing the oxidation of benzene to synthesize phenol, as well as its preparation method and application. Background technique [0002] Phenol is an important organic chemical raw material, mainly used in the manufacture of phenolic resin, bisphenol A and caprolactam. Among them, the production of phenolic resin is the largest use, accounting for more than half of the phenol output. In addition, phenol is also a raw material for many medicines (such as salicylic acid, aspirin and sulfa drugs, etc.), synthetic fragrances, and dyes (such as disperse red 3B). At the same time, a considerable amount of phenol is used to produce halogenated phenols, and the dilute aqueous solution of phenol can be directly used as antiseptic and disinfectant. [0003] In recent years, the world's...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J31/22C07C39/04C07C37/60
CPCY02P20/52
Inventor 王心晨叶祥桔
Owner FUZHOU UNIV
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