tio 2 Preparation method of /mof-5 composite photocatalyst

A MOF-5, composite light technology, applied in the field of photocatalysis, can solve the problem of difficult loading of MOF-5, and achieve the effect of improving the catalytic degradation efficiency

Active Publication Date: 2022-02-25
怀化宏辉服饰有限公司
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  • Abstract
  • Description
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  • Application Information

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Problems solved by technology

[0006] Based on this, it is necessary to provide a TiO 2 Preparation method of / MOF-5 composite photocatalyst

Method used

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  • tio <sub>2</sub> Preparation method of /mof-5 composite photocatalyst
  • tio <sub>2</sub> Preparation method of /mof-5 composite photocatalyst
  • tio <sub>2</sub> Preparation method of /mof-5 composite photocatalyst

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preparation example Construction

[0025] The embodiment of the present invention provides a kind of TiO 2 The preparation method of / MOF-5 composite photocatalyst comprises the following steps:

[0026] S10, add triethylamine to the mixed solution of soluble zinc salt, terephthalic acid and the first organic solvent, deprotonate terephthalic acid and self-assemble with zinc ions to form MOF-5, filter, wash, dry and grind to obtain MOF-5 powder;

[0027] S20, causing the hydrolyzable titanium source to undergo a hydrolysis reaction with water in a second organic solvent to obtain a first solution containing nano-titanium dioxide sol;

[0028] S30, concentrating the first solution, increasing the concentration of the nano-titanium dioxide sol, to obtain a second solution; and

[0029] S40, adding the MOF-5 powder to the second solution, thoroughly mixing by ultrasonic vibration, filtering, washing and drying to obtain TiO 2 / MOF-5 composite photocatalyst.

[0030] TiO provided by the invention 2 / MOF-5 compo...

Embodiment 1

[0049] S10, first add 1.21g of Zn(NO 3 ) 2 ·6H 2 O and 40ml N,N-dimethylformamide (DMF) were placed in a beaker, then 0.34g terephthalic acid (H 2 BDC) into the beaker, stirring constantly, after the solid is completely dissolved, then add 1.3mL triethylamine TEAC into the mixed solution, stirring constantly, react for about 3h, filter with suction, wash with DMF for 3-4 Once, unreacted inorganic salts and organic acids were removed to obtain a white solid. Finally, the white solid was dried in an oven. After drying, it was ground into powder to obtain MOF-5 powder.

[0050] S22, take 20ml of absolute ethanol and add it to a clean and dry flask, drop 4 drops of 0.2ml glacial acetic acid with a rubber dropper, and stir it magnetically for 5 minutes; take 2ml tetrabutyl titanate and add it to the above mixture, and stir it magnetically for 5 minutes; Slowly add 38ml of deionized water dropwise while stirring. The dropwise addition time is more than 15min. After the dropwise...

Embodiment 2

[0055] The preparation method is basically the same as that of Example 1, except that in step S30, 1 / 2 of the volume of the first solution is evaporated.

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Abstract

A loaded TiO 2 The preparation method of the composite photocatalyst comprises the following steps: adding triethylamine to the mixed solution of soluble zinc salt, terephthalic acid and the first organic solvent, making terephthalic acid deprotonation and zinc ion self-assembly MOF‑5, filtered, washed and dried to obtain MOF‑5 powder; the hydrolyzable titanium source is hydrolyzed with water in a second organic solvent to obtain a first solution containing nano-titanium dioxide; the first solution is concentrated, Increase the concentration of the nano-titanium dioxide sol to obtain a second solution; and add the MOF-5 powder to the second solution, fully mix by ultrasonic vibration, filter, wash and dry to obtain TiO 2 / MOF‑5 composite photocatalyst.

Description

technical field [0001] The invention relates to the technical field of photocatalysis, in particular to a TiO 2 / MOF-5 composite photocatalyst preparation method. Background technique [0002] Photocatalytic technology, that is, semiconductor photocatalyst technology, can be used to degrade organic wastewater, reduce heavy metal ions, purify air, sterilize, and prevent fog. Therefore, semiconductor photocatalytic materials have received extensive attention in the control of environmental pollution. In order to improve the photocatalytic efficiency and service life of semiconductor materials, as well as ensure the stability and safety of materials, it is very important to continuously develop new photocatalytic materials. [0003] Nano titanium dioxide (TiO 2 ) as a photocatalyst is an n-type semiconductor material with excellent performance, which can make full use of solar energy, is highly efficient, energy-saving and environmentally friendly, and shows good photostabil...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J31/38
CPCB01J31/1691B01J31/38B01J35/004
Inventor 向柏霖陈桂罗正红陈屿亮
Owner 怀化宏辉服饰有限公司
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