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Multi-component composite photocatalyst and preparation method and application thereof

A composite light and catalyst technology, applied in separation methods, chemical instruments and methods, chemical elements of heterogeneous catalysts, etc., can solve the problems of poor controllability of active particle size, easy aggregation of active components, and low utilization of light energy. , to achieve the effect of improving performance and applicability, small particle size, and high utilization of light energy

Active Publication Date: 2016-12-07
NANJING TECH UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, traditional supported catalysts still have problems such as poor controllability of active particle size, easy agglomeration of active components, narrow photoresponse window, and low utilization rate of light energy.

Method used

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  • Multi-component composite photocatalyst and preparation method and application thereof
  • Multi-component composite photocatalyst and preparation method and application thereof
  • Multi-component composite photocatalyst and preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] A preparation method and application of a multi-component composite photocatalyst, comprising the following steps:

[0019] (1) 1 g of terephthalic acid was dissolved in 40 mL of N,N-dimethylformamide, and a clear solution was obtained after stirring at room temperature for 10 min.

[0020] (2) Add 0.8g Bi(NO 3 ) 3 ·5H 2 O, stirred at room temperature for 20 min to obtain a mixed solution for subsequent use.

[0021] (3) Put 8 g of glass fibers into the mixed solution described in step (2) and soak at a constant temperature of 100° C. for 2 hours to obtain MOFs / glass fibers for later use.

[0022] (4) Dissolve 30 mL of tetrabutyl titanate in 15 mL of absolute ethanol and stir for 15 min. Put the treated MOFs / glass fiber material obtained in step (3) into the tetrabutyl titanate solution, carry out loading, and set aside. The above treatment method is to wash the MOFs / glass fiber material with ethanol, methanol or N,N-dimethylformamide, then wash with distilled wate...

Embodiment 2

[0029] A preparation method and application of a multi-component composite photocatalyst, comprising the following steps:

[0030] (1) Dissolve 0.5g of terephthalic acid in 25mL of N,N-dimethylformamide, stir at room temperature for 15min to obtain a clear solution, and set aside.

[0031] (2) Add 0.35g Zn(NO 3 ) 2 ·6H 2 O, stirred at room temperature for 15 min to obtain a mixed solution for subsequent use.

[0032] (3) Put 8 g of glass fibers into the mixed solution described in step (2) and soak at a constant temperature of 120° C. for 2 hours to obtain MOFs / glass fibers for later use.

[0033] (4) Dissolve 30 mL of tetrabutyl titanate in 15 mL of absolute ethanol, and stir for 10 min. Put the treated MOFs / glass fiber material obtained in step (3) into tetrabutyl titanate for loading, and set aside. The above treatment method is to wash the MOFs / glass fiber material with ethanol, methanol or N,N-dimethylformamide, then wash with distilled water or deionized water and d...

Embodiment 3

[0037] A preparation method of a multi-component composite photocatalyst, comprising the following steps:

[0038] (1) Dissolve 0.8g of terephthalic acid in 30mL of N,N-dimethylformamide, stir at room temperature for 13min to obtain a clear solution, and set aside.

[0039] (2) Add 0.35g Zn(NO 3 ) 2 ·6H 2 O, stirred at room temperature for 15 min to obtain a mixed solution for subsequent use.

[0040] (3) Put 8 g of glass fibers into the mixed solution described in step (2) and soak at a constant temperature of 120° C. for 2 hours to obtain MOFs / glass fibers for later use.

[0041] (4) 35g Bi(NO 3 ) 3 ·5H 2O was dissolved in 15 mL of absolute ethanol and stirred for 13 min. Put the treated MOFs / glass fiber material obtained in step (3) into a bismuth nitrate solution for loading, and set aside. The above treatment method is to wash the MOFs / glass fiber material with ethanol, methanol or N,N-dimethylformamide, then wash with distilled water or deionized water and dry at...

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Abstract

The invention provides a multi-component composite photocatalyst and a preparation method and application thereof. The method includes the following steps that an organic ligand A is obtained and dissolved in a solution B to obtain a clear solution for use; a metal compound C is added into the clear solution to obtain a mixed solution for use; a carrier is placed in the mixed solution to obtain an MOFs / carrier material for use; a metal compound D is dissolved in an organic solvent, then the processed MOFs / carrier material is placed in the mixture to be loaded for use; the prepared material is aged, then dried and roasted for 3-5 h, and the composite photocatalyst can be obtained. The multi-component composite photocatalyst has the advantages of being small in active component particle size, high in loading amount, uniform in distribution, wide in light response window (ultraviolet-visible light), high in light energy utilization rate and the like, synergetic catalysis of various metal oxides is achieved, performance and applicability of the photocatalyst are remarkably improved, and the photocatalyst is suitable for industrial production.

Description

technical field [0001] The invention relates to the field of photocatalysis used in the environment, in particular to a multi-component composite photocatalyst and its preparation method and application. Background technique [0002] In the 1990s, the international community began to try to use photocatalysis to remove organic waste gas. Photocatalytic oxidation technology has the advantages of fast and efficient reaction, thorough decomposition of pollutants and environmental friendliness. However, traditional supported catalysts still have problems such as poor controllability of active particle size, easy agglomeration of active components, narrow photoresponse window, and low utilization rate of light energy. [0003] Metal-organic frameworks (MOFs) materials are a kind of porous crystalline materials with periodic multi-dimensional network structure generated by hybridization of metal ions / clusters and organic ligands through self-assembly process. The surface area, p...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/18B01J23/06B01D53/86B01D53/72
CPCB01D53/72B01D53/8668B01J23/002B01J23/06B01J23/18B01D2257/7027B01D2257/704B01J2523/00B01J35/39B01J2523/47B01J2523/54B01J2523/41B01J2523/31B01J2523/23B01J2523/305B01J2523/22B01J2523/12B01J2523/27
Inventor 陈英文黄超邓磊沈树宝祝社民
Owner NANJING TECH UNIV
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