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Ni-doped TiO2/MOF-5 photocatalyst and preparation method thereof

A MOF-5, photocatalyst technology, applied in the field of photocatalytic materials, can solve problems such as poor water resistance and easy hydrolysis

Inactive Publication Date: 2019-03-19
HUAIHUA UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, MOF-5 has poor water resistance and is easily hydrolyzed, so the application of this type of catalyst should be seriously avoided.

Method used

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  • Ni-doped TiO2/MOF-5 photocatalyst and preparation method thereof
  • Ni-doped TiO2/MOF-5 photocatalyst and preparation method thereof
  • Ni-doped TiO2/MOF-5 photocatalyst and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0047] The first step: the synthesis of Ni-doped MOF-5, first 0.61g of Zn(NO 3 ) 2 ·6H 2 O, 0.6gNi(NO 3 ) 2 ·6H 2 O and 40ml of N,N-dimethylformamide (DMF) were placed in a beaker, and 0.34g of terephthalic acid (H 2 BDC) into the beaker, stirring constantly, after waiting for the solid to dissolve completely, then adding 1.4mL triethylamine TEAC into the mixed solution, stirring constantly, stirring to make it react for about 3h, to obtain a white solid, which was filtered by suction, pumped Wash with DMF 3-4 times during pressure filtration to remove unreacted inorganic salts and organic acids in the product. Finally, the samples were dried in an oven. After drying, it was ground for sample loading.

[0048] Step 2: Mix 4.5ml of distilled water and 8.9ml of absolute ethanol, adjust the pH to 3 with the prepared 5mol / L nitric acid solution to make the first solution; add 4.5ml of glacial acetic acid to 26.7ml of absolute ethanol , under vigorous stirring, slowly add 8...

Embodiment 2

[0051] The first step: the synthesis of Ni-doped MOF-5, first 0.41g of Zn(NO 3 ) 2 ·6H 2 O, 0.8gNi(NO 3 ) 2 ·6H 2 O and 40ml of N,N-dimethylformamide (DMF) were placed in a beaker, and 0.34g of terephthalic acid (H 2 BDC) into the beaker, stirring constantly, after waiting for the solid to dissolve completely, then adding 1.4mL triethylamine TEAC into the mixed solution, stirring constantly, stirring to make it react for about 3h, to obtain a white solid, which was filtered by suction, pumped Wash with DMF 3-4 times during pressure filtration to remove unreacted inorganic salts and organic acids in the product. Finally, the samples were dried in an oven. After drying, it was ground for sample loading.

[0052] Step 2: Mix 4.5ml of distilled water and 8.9ml of absolute ethanol, adjust the pH to 3 with the prepared 5mol / L nitric acid solution to make the first solution; add 4.5ml of glacial acetic acid to 26.7ml of absolute ethanol , under vigorous stirring, slowly add 8...

Embodiment 3

[0055] Basically the same as Example 1, except that the calcination temperature in the second step was changed to 300°C. Obtain the Ni-doped TiO of embodiment 3 2 / MOF-5 photocatalyst.

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Abstract

The invention relates to a Ni-doped TiO2 / MOF-5 photocatalyst and a preparation method thereof. The preparation method comprises the following steps: S1, mixing zinc nitrate, nickel nitrate, terephthalic acid, N,N-dimethylformamide and triethylamine to react for 1-10 hours, collecting a solid, and washing and drying the solid to obtain Ni-doped MOF-5; S2, mixing tetrabutyl titanate, glacial aceticacid, Ni-doped MOF-5 and an alcohol and water mixed solvent, stirring the mixture to react, and after reaction, filtering and collecting the filtrate, ageing, drying and calcining the filtrate to obtain the Ni-doped TiO2 / MOF-5 photocatalyst. The Ni-doped TiO2 / MOF-5 photocatalyst prepared by the method has relatively good water resistance and the application range of the catalyst can be extended effectively.

Description

technical field [0001] The invention relates to the technical field of photocatalytic materials, in particular to Ni-doped TiO 2 / MOF-5 photocatalyst and its 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. 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 photostability and high reactivity when reacting, without Toxicity, low cost, and no secondary pollution, it is a nano functional material with the broadest application prospects. [0003] MOF-5 is one of the most typical representatives of the family of metal-organic framework complexes, and it is a milestone in the history of the development of metal-orga...

Claims

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Application Information

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IPC IPC(8): B01J31/38
CPCB01J31/1691B01J31/38B01J2531/26B01J2531/847B01J35/39
Inventor 向柏霖刘跃进朱璐陈桂
Owner HUAIHUA UNIV
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