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A hybrid material based on photosensitive metal-organic coordination nanocage and titanium dioxide, its preparation method and application

A technology of titanium dioxide and hybrid materials, applied in the field of hybrid materials based on photosensitive metal-organic coordination nanocages and titanium dioxide and its preparation and application, can solve the problem of photocatalyst catalytic activity and stability reduction, competitive adsorption, occupation Active sites and other issues, to achieve good photocatalytic ability, reduce recombination probability, increase adsorption amount and activation degree

Active Publication Date: 2020-09-11
SUN YAT SEN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

At present, the common solution is surface modification or ion doping. However, surface modification is likely to cause problems such as competitive adsorption and occupation of active sites. Ion doping introduces a large number of electron-hole recombination centers, resulting in the catalytic Reduced activity and stability

Method used

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  • A hybrid material based on photosensitive metal-organic coordination nanocage and titanium dioxide, its preparation method and application
  • A hybrid material based on photosensitive metal-organic coordination nanocage and titanium dioxide, its preparation method and application
  • A hybrid material based on photosensitive metal-organic coordination nanocage and titanium dioxide, its preparation method and application

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preparation example Construction

[0061] A method for preparing a hybrid material based on photosensitive metal-organic coordination nanocages and titanium dioxide, comprising the following steps:

[0062] 1) Preparation of the photosensitive metal-organic coordination nanocage solution: dissolving the photosensitive metal-organic coordination nanocage in an organic solvent to form a photosensitive cage solution;

[0063] 2) Photosensitive metal-organic coordination nanocages-TiO 2 Preparation of gel: Mix tetrabutyl titanate, chelating agent, water and photosensitive cage solution, heat the mixture until it solidifies to form a translucent colloidal solid, and obtain photosensitive cage-TiO 2 gel;

[0064] 3) Post-processing of the gel: extraction of photosensitive cage-TiO 2 Gel and dry to obtain the hybrid material based on the photosensitive metal-organic coordination nanocage and titanium dioxide.

[0065] Preferably, in step 1) of the method for preparing the hybrid material, the organic solvent is at ...

Embodiment 1

[0083] 1. Synthesis of photosensitive metal-organic coordination nanocage MOC-1

[0084] The synthetic route of photosensitive metal-organic coordination nanocage MOC-1 is shown in the attached Figure 5 shown. This schematic diagram shows only an example of the synthesis method, and the method of the present invention is not limited to the related substances shown in the figure. Concrete synthetic steps are as follows:

[0085] 1. Synthesis of compound 1-2

[0086]

[0087] Synthesis steps: Add 1.206g (11.2mmol) pyridine-3-carbaldehyde, 1.974g (9.4mmol) 1,10-phenanthroline-5,6-dione (1-1) into a 100mL round bottom flask, 14.48g (188mmol) of ammonium acetate and 40mL of glacial acetic acid, the reaction solution was refluxed for 3h, cooled to room temperature after the reaction, and diluted with 160mL of distilled water. Concentrated ammonia water was added dropwise to the diluted reaction solution and stirred continuously until a large amount of yellow precipitates wer...

Embodiment 2

[0107] 1. Synthesis of photosensitive metal-organic coordination nanocage MOC-2

[0108] The synthetic route of photosensitive metal-organic coordination nanocage MOC-2 is shown in the attached Figure 15 shown. This schematic diagram shows only an example of the synthesis method, and the method of the present invention is not limited to the related substances shown in the figure. Concrete synthetic steps are as follows:

[0109] 1. Synthesis of compound 2-2

[0110]

[0111] Dissolve tribromotriphenylamine 2-1 (2.4g, 5mmol), 2-thiophene boronic acid (3.5g, 30mmol) in 100mL THF; anhydrous potassium carbonate (12g, 85mmol) in 40mL water; mix the above solutions in In a 250mL Schlenk bottle, pass through argon to deoxygenate for 1h, and in an argon atmosphere, Pd(pph 3 ) 4 (1.3g, 1.1mmol) was added to a Schlenk bottle, heated to 70°C, condensed and refluxed for 6h. After the reaction was completed, the reaction solution was cooled and spin-dried, dissolved in dichloromet...

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Abstract

The invention discloses a hybrid material based on photosensitive metal-organic coordination nanocage and titanium dioxide and its preparation method and application. This hybrid material based on photosensitive metal-organic coordination nanocages and titanium dioxide includes photosensitive metal-organic coordination nanocages and titanium dioxide. At the same time, the preparation method of this hybrid material based on photosensitive metal-organic coordination nanocages and titanium dioxide is also disclosed, as well as the application of this hybrid material in photocatalysis. The organic-inorganic hybrid material made of the photosensitive metal-organic coordination nanocage and titanium dioxide of the present invention has a hierarchical porous structure, which can improve the free diffusion of gas and CO 2 Surface adsorption increases the adsorption amount and activation degree of reactants, and also reduces the recombination probability of electron-hole pairs, effectively improving the photocatalytic efficiency.

Description

technical field [0001] The invention relates to a hybrid material based on photosensitive metal-organic coordination nanocage and titanium dioxide, its preparation method and application. Background technique [0002] Due to the energy crisis and environmental pollution in today's society, people's demand for new clean and efficient energy is increasingly urgent. Solar energy has attracted widespread attention due to its green, efficient, abundant and renewable advantages. The conversion of solar energy into chemical energy and utilization has also become the focus of people's research. Photocatalytic water splitting to generate hydrogen and oxygen, or transfer oxygen from water to oxidize organic substrates while generating hydrogen, has become a research hotspot. The use of photocatalytic reduction of carbon dioxide gas to produce carbon monoxide or other small organic molecules not only solves the pollution problem of carbon dioxide, but also obtains small molecule ener...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J31/38B01J35/10C01B3/04C01B32/40
CPCC01B3/042B01J31/1815B01J31/38C01B2203/1064B01J2531/824B01J35/60B01J35/615B01J35/39Y02E60/36
Inventor 刘军民秦苏苏成勇陈逸凡黄剑锋刘靓钟宇辉徐耀维
Owner SUN YAT SEN UNIV
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