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Preparation method of TiO2/porphyrin/MOFs (metal-organic frameworks) ultra-thin heteroplasmon

A heterogeneous and porphyrin technology, which is applied in the field of preparation of inorganic-organic composite functional materials, can solve problems such as narrow spectral response range and poor carbon dioxide capture ability, and achieve the effect of optimizing comprehensive performance

Active Publication Date: 2017-11-03
UNIV OF SCI & TECH BEIJING
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] The purpose of the present invention is to solve the problems of narrow spectral response range and poor carbon dioxide capture ability of titanium dioxide, and develop a TiO2 2 The preparation method of / porphyrin / MOFs composite material makes the prepared catalytic material not only have a wide spectral response range, but also have strong carbon dioxide adsorption capacity and excellent catalytic performance, and can be widely used in the field of carbon dioxide photocatalytic reduction

Method used

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  • Preparation method of TiO2/porphyrin/MOFs (metal-organic frameworks) ultra-thin heteroplasmon
  • Preparation method of TiO2/porphyrin/MOFs (metal-organic frameworks) ultra-thin heteroplasmon
  • Preparation method of TiO2/porphyrin/MOFs (metal-organic frameworks) ultra-thin heteroplasmon

Examples

Experimental program
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Effect test

Embodiment 1

[0026] 1) TiO 2 Preparation of nanosheets

[0027] Put 25 mL of tetrabutyl titanate in a beaker, slowly add 5 mL of hydrofluoric acid into the beaker, stir evenly, transfer the obtained white jelly to a 100 ml polytetrafluoroethylene autoclave, and then The reactor is placed at 200 o After reacting for 20 h in a C oven, it was slowly cooled to room temperature. Remove the white precipitate from the lower layer and centrifuge and wash it several times with deionized water until the supernatant is neutral, then place it at 80 o C drying in a vacuum drying oven to obtain TiO 2 Nanosheets.

[0028] 2) TiO 2 / Preparation of porphyrin / MOFs

[0029] TiO 2 / Porphyrin / MOFs preparation process is as follows: Take the above TiO 2 Nanosheets 0.1g were placed in a DMF solution of tetracarboxyphenyl cobalt porphyrin with a concentration of 1 M, and placed in an ultrasonic cleaner for 30 minutes to make the TiO 2 The nanosheets were fully dispersed, followed by magnetic stirring ...

Embodiment 2

[0035] 1) TiO 2 Preparation of nanosheets

[0036] Put 25 mL of tetrabutyl titanate in a beaker, slowly add 3 mL of hydrofluoric acid into the beaker, stir evenly, transfer the obtained white jelly into a 100 ml polytetrafluoroethylene autoclave, and then put the reaction Kettle placed at 180 o After reacting for 20 h in a C oven, it was slowly cooled to room temperature. Remove the white precipitate from the lower layer and centrifuge and wash it several times with deionized water until the supernatant is neutral, then place it at 80 o C drying in a vacuum drying oven to obtain TiO 2 Nanosheets.

[0037] 2) TiO 2 / Preparation of porphyrin / MOFs

[0038] TiO 2 / Porphyrin / MOFs preparation process is as follows: Take the above TiO 2 Nanosheets 0.3g were placed in a DMF solution of tetracarboxyphenyl zinc porphyrin with a concentration of 3M, placed in an ultrasonic cleaner for 30min, and the TiO 2 The nanosheets were fully dispersed, followed by magnetic stirring at r...

Embodiment 3

[0040] 1) TiO 2 Preparation of nanosheets

[0041] Put 25 mL of tetrabutyl titanate in a beaker, slowly add 5 mL of hydrofluoric acid into the beaker, stir evenly, transfer the obtained white jelly into a 100 ml polytetrafluoroethylene autoclave, and then put The reactor is placed at 220 o After reacting for 20 h in a C oven, it was slowly cooled to room temperature. Remove the white precipitate from the lower layer and centrifuge and wash it several times with deionized water until the supernatant is neutral, then place it at 80 o C drying in a vacuum drying oven to obtain TiO 2 Nanosheets.

[0042] 2) TiO 2 / Preparation of porphyrin / MOFs

[0043] TiO 2 / Porphyrin / MOFs preparation process is as follows: Take the above TiO 2 Nanosheets 0.5g were placed in a DMF solution of tetracarboxyphenyl cobalt porphyrin with a concentration of 5M, placed in an ultrasonic cleaner for 40min, and the TiO 2 The nanosheets were fully dispersed, followed by magnetic stirring at room ...

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Abstract

The invention discloses a preparation method of TiO2 / porphyrin / MOFs (metal-organic frameworks) ultra-thin heteroplasmon, and belongs to the technical field of inorganic-organic composite functional material preparation. A TiO2 ultra-thin nano-sheet serves as a template, a porphyrin compound is anchored on the surface of the TiO2 ultra-thin nano-sheet by functional groups such as carboxyl and hydroxy on the periphery of the porphyrin compound, and MOFs wrap an outer layer of the porphyrin compound by means of metal-organic framework layer-by-layer self-assembly through residual functional groups such as carboxyl and hydroxy on the periphery of the porphyrin compound to obtain the TiO2 / porphyrin / MOFs ultra-thin heteroplasmon with efficient and stable catalytic activity. The preparation method has the advantages that ultra-thin heteroplasmon catalysis area / light absorption area / adsorption area layer construction and functional integration are creatively performed by the aid of TiO2, porphyrin and the MOFs, a novel catalytic material with excellent performance for photocatalytic reduction of carbon dioxide is developed, and the performance of the TiO2 / porphyrin / MOFs ultra-thin heteroplasmon is optimized based on adjustable structural and functional characteristics of porphyrin and MOFs materials.

Description

technical field [0001] The invention belongs to the technical field of preparation of inorganic-organic composite functional materials, in particular to a TiO 2 / porphyrin / MOFs ultra-thin heterogeneous body (that is, MOFs supported on porphyrin-sensitized TiO 2 on nanosheets). Background technique [0002] Realizing the resource and energy conversion of carbon dioxide, and converting it into renewable energy and high value-added products can not only help solve the problem of increasing depletion of petrochemical resources, but also help alleviate the greenhouse effect caused by excessive carbon dioxide concentration in the atmosphere and other environmental issues. At present, the conversion pathways of carbon dioxide mainly include thermochemical conversion, electrochemical conversion and photocatalytic conversion. Compared with thermochemical and electrochemical conversions that require high-energy power sources such as heat and electricity, the power source of photoca...

Claims

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Application Information

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IPC IPC(8): B01J31/38
CPCB01J31/38B01J2231/62B01J35/39
Inventor 王戈王军勇高鸿毅陈思远安迪李洁张欢
Owner UNIV OF SCI & TECH BEIJING
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