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MOF-derived carbon-based photonic crystal-porphyrin-containing COFs composite material and its preparation method and application

A technology of photonic crystals and composite materials, applied in the field of materials, can solve the problems of unsatisfactory carbon dioxide adsorption effect, difficulty in exposing adsorption sites, etc., achieve good adsorption effect, inhibit agglomeration, and improve adsorption capacity

Active Publication Date: 2019-11-05
SUN YAT SEN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, two-dimensional COFs materials containing porphyrin structures are easy to combine together to form bulk materials due to their strong sheet-layer interaction force, and it is difficult to expose the adsorption sites, which leads to their poor adsorption effect on carbon dioxide. ideal

Method used

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  • MOF-derived carbon-based photonic crystal-porphyrin-containing COFs composite material and its preparation method and application
  • MOF-derived carbon-based photonic crystal-porphyrin-containing COFs composite material and its preparation method and application
  • MOF-derived carbon-based photonic crystal-porphyrin-containing COFs composite material and its preparation method and application

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0048] In this example, a MOF-derived carbon-based photonic crystal-porphyrin-containing COFs composite material was prepared. The specific preparation method is as follows:

[0049] (1) Preparation of silica photonic crystal:

[0050] Dissolve tetraethyl orthosilicate (TEOS 25 ml) in ethanol (360 ml) at 30°C, then slowly add ammonium hydroxide (22 ml) and deionized water (20 ml) dropwise, and mix the obtained The solution was stirred at 30 °C for 18 h. Then, monodisperse silica microspheres dispersed in water can be obtained by centrifugation and ultrasonication. The concentration of the silica microspheres dispersed in water is adjusted to 5wt%, and placed in a 10 ml flask, so that the monodisperse silica microspheres are carried out on the bottle wall under the conditions of 65° C. and relative humidity of 65%. Assembled to obtain the silicon dioxide photonic crystal with a diameter of 200 nanometers. Silica photonic crystals with different diameters can be obtained by a...

Embodiment 2

[0059] In this example, a porphyrin-containing COFs material was prepared, and the specific preparation method is as follows:

[0060] In a high temperature pressure tube (26*125 mm), H2TAP (50 mg), terephthalaldehyde (18 mg) were dispersed in o-dichlorobenzene (3 ml), butanol (3 ml) and acetic acid (0.75 milliliter, concentration: 6 mol / liter) in the mixed solution, after ultrasonic 15 minutes of gained reaction mixture, then freeze under the temperature of 77K (liquid nitrogen bath), then by freezing-vacuumize (approximately 50 millitorr inside pressure)-thawing and dissolving cycle to reduce the oxygen content in the system. After complete deoxygenation, heat the reaction mixture to 120°C and continue to react for 48 hours. A dark purple precipitate will form at the bottom of the tube. Filter and separate the precipitate . The separated dark purple solid was transferred to a Soxhlet extractor, and washed by dioxane (24 hours) and acetone (24 hours) under reflux to obtain 6...

Embodiment 3

[0079] The carbon dioxide adsorption properties of the MOF-derived carbon-based photonic crystal prepared in Example 1, the MOF-derived carbon-based photonic crystal-porphyrin-containing COFs composite material, and the porphyrin-containing COFs material prepared in Example 2 were tested.

[0080] The test method of carbon dioxide adsorption performance is as follows: use micromeritics ASAP 2020 to test at room temperature 298K. Before the test, the material to be tested is treated at 120°C for 10 hours to remove the gas and water adsorbed on the surface of the material.

[0081] Test results such as Figure 13 As shown in Table 3, in conjunction with the results of the above-mentioned Table 1 and Table 2, it can be seen that different carbonization annealing temperatures will affect the specific surface area and N content of the MOF-derived carbon-based photonic crystals prepared by the present invention, and as the annealing temperature increases , the N content will decreas...

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Abstract

The invention relates to an MOF (metal organic framework)-derived carbon-based photonic crystal-porphyrin-containing COFs (covalent organic frameworks) composite material as well as a preparation method and the application thereof. The composite material is obtained by performing reaction on an MOF-derived carbon-based photonic crystal, tetraniline porphyrin and terephthalaldehyde. The composite material has high adsorption capability and adsorption capacity on carbon dioxide.

Description

technical field [0001] The invention relates to the field of material technology, in particular to a MOF-derived carbon-based photonic crystal-porphyrin-containing COFs composite material and its preparation method and application. Background technique [0002] In recent years, the greenhouse effect caused by several greenhouse gases (carbon dioxide, chlorofluorocarbons (CFC), methane, low-altitude ozone, and nitrogen oxides) has aroused widespread concern and concern. Warming has the greatest impact. Over the past two centuries, rapid global population growth, industrial production, and consumption of fossil fuels have led to a dramatic increase in the concentration of carbon dioxide on Earth, with many detrimental consequences for living ecosystems on land and in the sea. At present, most of the carbon dioxide is released from the combustion of fuel in power plants, and capturing carbon dioxide from power plant exhaust is an effective way to reduce carbon dioxide in the a...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J20/22B01J20/28B01J20/30B01D53/02
CPCB01D53/02B01D2253/25B01D2257/504B01J20/22B01J20/226B01J20/28066B01J20/2808Y02C20/40
Inventor 余丁山陈旭东杨美佳简俊华郑敏珍胡轩赫
Owner SUN YAT SEN UNIV
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