TiO2/ZIF-8 nanocomposite with core-shell structure and preparation method of TiO2/ZIF-8 nanocomposite

A nanocomposite material, ZIF-8 technology, applied in the direction of separation methods, chemical instruments and methods, organic compounds/hydrides/coordination complex catalysts, etc., can solve the problems of poor adsorption performance, achieve mild preparation conditions, and process Simple, great application potential for effects

Active Publication Date: 2015-12-23
WUHU ALDOC TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

This patented technology involves making special types of nanoparticles called zinc oxide (ZnON), that can be used for various applications such as purification processes involving harmful chemical substances from gases or water pollution. These particles have unique properties due to their small size and high surface area per unit weight compared with traditional methods like precipitation techniques.

Problems solved by technology

The technical problem addressed by this patented method relates to improving the properties of certain types of metallized polymers called MOFS that have been developed into various applications like sensors, separators, fuel cells, and light harvesting devices due to their superior heat/hydrothermal stabilities compared to traditional methods involving strong acid sites on silica gel supports. This combination allows these molecules to perform better functions than pure titanium oxide alone while also being less expensive and having improved environmental friendliness.

Method used

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  • TiO2/ZIF-8 nanocomposite with core-shell structure and preparation method of TiO2/ZIF-8 nanocomposite
  • TiO2/ZIF-8 nanocomposite with core-shell structure and preparation method of TiO2/ZIF-8 nanocomposite
  • TiO2/ZIF-8 nanocomposite with core-shell structure and preparation method of TiO2/ZIF-8 nanocomposite

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] (1) Add 1.36g tetrabutyl titanate to 20L ethylene glycol solution, stir evenly at room temperature for 24 hours, then add it to anhydrous acetone, stir rapidly for 10 minutes and then let stand for 1 hour; centrifuge the white suspension, water and ethanol washing and drying to obtain uniform TiO 2 Amorphous nanospheres; then these powders were added to 20% tetramethylammonium hydroxide aqueous solution, reacted at 160°C for 48h, and finally centrifuged, washed with water and ethanol and dried to obtain TiO 2 nanospheres.

[0032] (2) The prepared TiO 2 0.1 g of pellets was added to 40 mL of Zn(NO 3 ) 2 ·6H 2 Stir in O methanol solution for 0.5h, then add 40mL of 2-methylimidazole methanol solution with a molar concentration of 0.2mol / L, continue to stir for 1h, centrifuge, wash with water and ethanol and dry to obtain TiO 2 / ZIF-8 core-shell structure nanocomposites.

[0033] Products were analyzed using X-ray diffraction (XRD), scanning electron microscopy (SEM...

Embodiment 2

[0040] (1) Add 10.21g tetrabutyl titanate to 20L ethylene glycol solution, stir evenly at room temperature for 12 hours, then add it to anhydrous acetone, stir rapidly for 30 minutes and then let stand for 2 hours; centrifuge the white suspension, water and ethanol washing and drying to obtain uniform TiO 2 Amorphous nanospheres; then these powders were added to 30% tetramethylammonium hydroxide aqueous solution, reacted at 200°C for 24h, and finally centrifuged, washed with water and ethanol and dried to obtain TiO 2 nanospheres.

[0041] (2) The prepared TiO 2 0.1 g of pellets was added to 40 mL of Zn(NO 3 ) 2 ·6H 2 Stir in O methanol solution for 1 h, then add 40 mL of 2-methylimidazole methanol solution with a molar concentration of 0.08 mol / L, continue stirring for 4 h, centrifuge, wash with water and ethanol and dry to obtain TiO 2 / ZIF-8 core-shell structure nanocomposites.

[0042] Figure 6 It is the SEM figure of the product of Example 2 of the present invent...

Embodiment 3

[0044] (1) Add 5.45g tetrabutyl titanate to 20L ethylene glycol solution, stir evenly at room temperature for 12 hours, then add it to anhydrous acetone, stir rapidly for 30 minutes and then let stand for 2 hours; centrifuge the white suspension, water and ethanol washing and drying to obtain uniform TiO 2 Amorphous nanospheres; then these powders were added to 25% tetramethylammonium hydroxide aqueous solution, reacted at 180°C for 12h, and finally centrifuged, washed with water and ethanol and dried to obtain TiO 2 nanospheres.

[0045] (2) The prepared TiO 2 0.1 g of pellets was added to 40 mL of Zn(NO 3 ) 2 ·6H 2 Stir in O methanol solution for 1 h, then add 40 mL of 2-methylimidazole methanol solution with a molar concentration of 1.2 mol / L, continue stirring for 2 h, centrifuge, wash with water and ethanol and dry to obtain TiO 2 / ZIF-8 core-shell structure nanocomposites.

[0046] Figure 7 It is the SEM figure of the product of Example 3 of the present inventio...

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Abstract

The invention discloses a preparation method of a TiO2/ZIF-8 nanocomposite with a core-shell structure. The preparation method comprises the following steps: firstly, tetrabutyl titanate is added to an ethylene glycol solution and stirred uniformly, the mixture is added to anhydrous acetone, stirred quickly and left to stand, and TiO2 amorphous nano-beads are obtained through separation, washing and drying; the nano-beads are added to a tetramethylammonium hydroxide aqueous solution and react at 160-200 DEG C, and TiO2 nano-beads are obtained through separation, washing and drying; the prepared TiO2 nano-beads are added to a methanol solution of Zn(NO3)2*6H2O and are stirred, a methanol solution of 2-methylimidazole is then added, and the TiO2/ZIF-8 nanocomposite with the core-shell structure is obtained through separation, washing and drying. The preparation method has mild preparation conditions and simple process; the synthesized TiO2/ZIF-8 composite has uniform size and good dispersity and is expected to be applied to gas separation, photoelectric materials, photocatalytic materials and the like.

Description

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Claims

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Application Information

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Owner WUHU ALDOC TECH CO LTD
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