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Hybrid material on basis of photosensitive metal-organic coordination nanometer cages and titanium dioxide, method for preparing hybrid material and application thereof

A technology of titanium dioxide and hybrid materials, which is applied to the hybrid materials based on photosensitive metal-organic coordination nano-cages and titanium dioxide and their preparation and application fields, can solve the problems of competitive adsorption, reduction of photocatalyst catalytic activity and stability, and occupation of Active sites and other issues, to achieve the effect of reducing the recombination probability, good photocatalytic ability, increasing adsorption capacity and activation degree

Active Publication Date: 2018-05-29
SUN YAT SEN UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

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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  • Hybrid material on basis of photosensitive metal-organic coordination nanometer cages and titanium dioxide, method for preparing hybrid material and application thereof
  • Hybrid material on basis of photosensitive metal-organic coordination nanometer cages and titanium dioxide, method for preparing hybrid material and application thereof
  • Hybrid material on basis of photosensitive metal-organic coordination nanometer cages and titanium dioxide, method for preparing hybrid material and application thereof

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preparation example Construction

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

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

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

[0064] 3) Post-processing of the gel: extraction of photosensitive cage-TiO 2 The gel is dried 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 least one of THF, DMF, DMSO...

Embodiment 1

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

[0084] The synthetic route of the photosensitive metal-organic coordination nanocage MOC-1 is shown as attached Figure 5 Shown. The schematic diagram only shows an example of the synthesis method, and the method of the present invention is not limited to the related substances shown in the diagram. The specific synthesis 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) in 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 continuously stirred until a large amount of yellow precipitate was produced....

Embodiment 2

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

[0108] The synthetic route of the photosensitive metal-organic coordination nanocage MOC-2 is shown as attached Figure 15 Shown. The schematic diagram only shows an example of the synthesis method, and the method of the present invention is not limited to the related substances shown in the diagram. The specific synthesis 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, let argon gas deoxygenate for 1h, and Pd(pph 3 ) 4 (1.3g, 1.1mmol) was added to a Schlenk flask, heated to 70°C and refluxed for 6h. After the reaction, the reaction solution was cooled and spin-dried, dissolved in dichloromethane, filtered, and the filtrate was washed with ammonia and water ...

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Abstract

The invention discloses a hybrid material on the basis of photosensitive metal-organic coordination nanometer cages and titanium dioxide, a method for preparing the hybrid material and application thereof. The hybrid material on the basis of the photosensitive metal-organic coordination nanometer cages and the titanium dioxide comprises the photosensitive metal-organic coordination nanometer cagesand the titanium dioxide. The hybrid material can be applied to photocatalysis. The hybrid material, the method and the application have the advantages that the organic-inorganic hybrid material madeof the photosensitive metal-organic coordination nanometer cages and the titanium dioxide is of a hierarchical porous structure, accordingly, free gas diffusion and CO2 surface adsorption can be improved, the adsorption quantities of reactants can be increased, the activation level of the reactants can be upgraded, the electron-hole pair composition probability further can be lowered, and the photocatalytic efficiency can be effectively enhanced.

Description

Technical field [0001] The invention relates to a hybrid material based on a photosensitive metal-organic coordination nano cage and titanium dioxide, and a preparation method and application thereof. 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 people's attention due to its green, high-efficiency, rich and renewable advantages. The conversion of solar energy into chemical energy for use has also become the focus of research. Photocatalytic water splitting to produce hydrogen and oxygen, or to transfer oxygen in water to oxidize organic substrates while producing hydrogen has become a research hotspot. The use of photocatalytic reduction of carbon dioxide gas to produce carbon monoxide or other organic small molecules not only solves the problem of carbon dioxide pollution, but also obtains small molecular energy substan...

Claims

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Application Information

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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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