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Metal/graphite-like carbon nitride compound catalyst and preparing method thereof

A graphitic carbon nitride and composite technology, which is applied in the preparation of organic compounds, preparation of aminohydroxy compounds, catalysts for physical/chemical processes, etc., can solve the problems of easy poisoning of catalysts, expensive catalysts, and high cost of raw materials

Inactive Publication Date: 2014-02-19
FUJIAN INST OF RES ON THE STRUCTURE OF MATTER CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the catalysts used in hydrogenation reduction are relatively expensive, and the requirements for the purity of raw materials are high, the cost of raw materials is high, and the catalysts are easily poisoned, making industrial production difficult.

Method used

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  • Metal/graphite-like carbon nitride compound catalyst and preparing method thereof
  • Metal/graphite-like carbon nitride compound catalyst and preparing method thereof
  • Metal/graphite-like carbon nitride compound catalyst and preparing method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0038] Example 1: Gold / Graphite-like Carbon Nitride Composite

[0039] Synthetic g-C 3 N 4 and HAuCl 4 As the starting material, weigh 1.5 g of g-C 3 N 4 , add 100mL of deionized water; under the condition of stirring, add 0.6mol / L HAuCl dropwise to the above solution 4 , continue stirring for 30 minutes. An aqueous solution of hydrazine hydrate was added dropwise until the reaction was complete. Then the reaction mixture solution was separated, washed 5 times with deionized water, and dried at 80°C for 10 hours to obtain the final Au / g-C 3 N 4 product.

[0040] figure 1 X-ray diffraction pattern of the gold / graphitic carbon nitride composite prepared for this example. with pure g-C 3 N 4 The comparison of the X-ray diffraction pattern shows that the powder spectrum can be indexed as gold and g-C 3 N 4 phase, without the existence of other impurity phases. figure 2 with image 3 The TEM photo and high-resolution TEM photo of this sample, from which it can be s...

Embodiment 2

[0044] Example 2: Silver / Graphite-like Carbon Nitride Composite

[0045] Synthetic g-C 3 N 4 and AgNO 3 as the starting material. Weigh 1.5g of g-C 3 N 4 , add 100mL of deionized water, and add 0.8mol / L AgNO 3 , continue stirring for 30 minutes. An aqueous solution of hydrazine hydrate was added dropwise until the reaction was complete. Then the reaction mixture solution was separated, washed five times with deionized water, and dried at 80° C. for 10 hours to obtain the final product.

[0046] Figure 7 For the X-ray diffraction pattern of the carbon composite prepared in this example, the spectrum of the powder can be indicated as the phase of silver and graphite-like carbon nitride, without the existence of other impurity phases.

[0047] The Ag / g-C 3 N 4 The complex can be used as a catalyst under normal temperature and pressure. According to the above-mentioned catalytic performance test conditions, the catalytic performance curve obtained is as follows Figu...

Embodiment 3

[0048] Example 3: Platinum / Graphite-like Carbon Nitride Composite

[0049] Synthetic g-C 3 N 4 and H 2 PtCl 6 as the starting material. Weigh 1.5g of g-C 3 N 4 , add 100 mL of deionized water, and add 0.2 mol / L H 2 PtCl 6 , continue stirring for 30 minutes. An aqueous solution of hydrazine hydrate was added dropwise until the reaction was complete. Then the reaction mixture solution was separated, washed five times with deionized water, and dried at 80° C. for 10 hours to obtain the final product.

[0050] Figure 9 X-ray diffraction pattern of the carbon composite prepared for this example. Compared with the X-ray diffraction pattern of pure graphite-like carbon nitride, it can be seen that the diffraction peak of platinum in the composite pattern is very weak.

[0051] The Pt / g-C 3 N 4 The complex can be used as a catalyst under normal temperature and pressure. According to the above-mentioned catalytic performance test conditions, the catalytic performance cu...

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Abstract

The invention relates to a metal / graphite-like carbon nitride (g-C3N4) compound catalyst and a preparing method thereof in the field of catalysis. The chemical constitution of a metal / graphite-like carbon nitride provided by the invention is M / g-C3N4, wherein the metal M is Au, Ag, Pt, Pd, Bi, Cu, Ru or Rh, wherein the content of metal is 0-50% (mass fraction). The metal / graphite-like carbon nitride compound is a catalytic reducing agent at normal pressure and temperature, and the material is suitable for reducing derivants of nitrobenzene.

Description

technical field [0001] The invention relates to a metal / graphite-like carbon nitride composite catalyst in the field of catalysis and a preparation method thereof Background technique [0002] Aniline and its derivatives are important organic chemical raw materials and pharmaceutical intermediates, widely used in medicine, dyes and rubber additives and other industries. There are many ways to synthesize aniline and its derivatives, which can be divided into nitrophenol method, phenol method, nitrochlorobenzene method and nitrobenzene method according to raw materials. P-aminophenol is one of the most widely used aniline derivatives. The earliest method for synthesizing p-aminophenol is to reduce p-nitrophenol with tin powder. Later, p-aminophenol was prepared by iron powder reduction method, electrolytic reduction method or catalytic hydrogenation method. Among them, the catalytic hydrogenation method has been studied more. This method uses p-nitrophenol as a raw material,...

Claims

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Application Information

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IPC IPC(8): B01J27/24C07B43/04C07C213/02C07C215/76
Inventor 徐杨森李广社李莉萍
Owner FUJIAN INST OF RES ON THE STRUCTURE OF MATTER CHINESE ACAD OF SCI
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