MOF-based derivative composite photocatalyst and preparation method thereof

A technology of photocatalyst and nano-photocatalyst, which is applied in the direction of chemical instruments and methods, physical/chemical process catalysts, hydrogen production, etc., can solve complex and flexible coordination problems, improve conductivity, improve photocatalytic efficiency, and improve Effects of light absorption efficiency and photocatalytic activity

Active Publication Date: 2019-05-14
UNIV OF JINAN
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  • Abstract
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  • Application Information

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Problems solved by technology

[0006] The present invention can effectively solve the problem of flexible coordination between complex multi-phase metals and ligands by using two kinds of ligands to synthesize MOF heterojunctions in situ. 2 S 4 with g-C 3 N 4 The coupling of MXene and the use of MXene as the charge carrier can effectively separate the photogenerated electron-hole pairs, improve the photocatalytic efficiency, and expand the application of inorganic composite nanomaterials in the field of photocatalytic hydrogen production

Method used

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  • MOF-based derivative composite photocatalyst and preparation method thereof
  • MOF-based derivative composite photocatalyst and preparation method thereof
  • MOF-based derivative composite photocatalyst and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0021] 1) g-C 3 N 4 Preparation of / MXene / CuZnIn-MOF solid powder:

[0022] According to anhydrous zinc nitrate, anhydrous copper nitrate, anhydrous indium nitrate, 2-methylimidazole, terephthalic acid, g-C 3 N 4, The mass ratio of MXene and dimethylformamide is 5:20:5:15:4.5:5:0.5:45, anhydrous zinc nitrate, anhydrous copper nitrate, anhydrous indium nitrate, 2-methyl Imidazole, terephthalic acid, g-C 3 N 4 , MXene and dimethylformamide were mixed, and the above mixed solution was solvothermally reacted at 120 ° C for 38 hours. g-C was obtained after drying at ℃ 3 N 4 / MXene / CuZnIn-MOF solid powder.

[0023] 2) g-C 3 N 4 / MXene / CuZnIn 2 S 4 Preparation of composite photocatalyst:

[0024] According to g-C 3 N 4 The mass ratio of / MXene / CuZnIn-MOF solid powder, thiourea and deionized water is 40:10:50, the g-C 3 N 4 / MXene / CuZnIn-MOF solid powder, thiourea and deionized water were mixed, and the above mixed solution was solvothermally reacted at 140°C for 35 h...

Embodiment 2

[0027] 1) g-C 3 N 4 / MXene / CuZnIn-MOF solid powder preparation:

[0028] According to anhydrous sulfur zinc, anhydrous sulfur copper, anhydrous sulfur indium, 2-methylimidazole, terephthalic acid, g-C 3 N 4 The mass ratio of , MXene and dimethylformamide is 16:5:14:17:13:4.8:0.2:30, according to the ratio of anhydrous sulfur zinc, anhydrous sulfur copper, anhydrous sulfur indium, 2-methyl imidazole, terephthalic acid, g-C 3 N 4 , MXene and dimethylformamide were mixed, and the above mixed solution was solvothermally reacted at 200 ° C for 24 hours. After the reaction was completed, after natural cooling, centrifugal separation was carried out, and then fully washed with deionized water and absolute ethanol in sequence. g-C was obtained after drying at ℃ 3 N 4 / MXene / CuZnIn-MOF solid powder.

[0029] 2) g-C 3 N 4 / MXene / CuZnIn 2 S 4 Preparation of composite photocatalyst:

[0030] According to g-C 3 N 4 The mass ratio of / MXene / CuZnIn-MOF solid powder, thioacetam...

Embodiment 3

[0033] 1) g-C 3 N 4 Preparation of / MXene / CuZnIn-MOF solid powder:

[0034] According to anhydrous zinc chloride, anhydrous copper chloride, anhydrous indium chloride, 2-methylimidazole, terephthalic acid, g-C 3 N 4 The mass ratio of , MXene and dimethylformamide is 5:18:12:10:5:9:1:40, anhydrous zinc chloride, anhydrous copper chloride, anhydrous indium chloride, 2 -Methylimidazole, terephthalic acid, g-C 3 N 4 , MXene and dimethylformamide were mixed, and the above mixed solution was solvothermally reacted at 280 ° C for 6 hours. After the reaction was completed, after natural cooling, centrifugal separation was carried out, and then fully washed with deionized water and absolute ethanol in turn, at 80 g-C was obtained after drying at ℃ 3 N 4 / MXene / CuZnIn-MOF solid powder.

[0035] 2) g-C 3 N 4 / MXene / CuZnIn 2 S 4 Preparation of composite photocatalyst:

[0036] According to g-C 3 N 4 The mass ratio of / MXene / CuZnIn-MOF solid powder, thioacetamide and deioniz...

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Abstract

The invention belongs to the technical field of nano material preparation, in particular to a g-C3N4/MXene/CuZnIn2S4 nano composite photocatalyst and a preparation method thereof. CuZnIn2S4 which is taken as a widely-used photocatalyst can improve the photocatalytic activity by adjusting the morphology and increasing the number of exposed active sites; and MOF heterojunction has high specific surface area and rich pore structure, and can solve the problem of flexible coordination between complex multiphase metals and ligands and provide favorable conditions for the construction of efficient photocatalysts. The preparation method of the composite photocatalyst includes introducing g-C3N4 and MXene into the CuZnIn-MOF heterojunction; and vulcanizing to obtain a target product, namely, the g-C3N4/MXene/CuZnIn2S4 nano composite photocatalyst. The method has the advantages that the CuZnIn2S4 prepared by taking MOF as a template has an ultra-large specific surface area, provides more loadingsites for coupling of the CuZnIn2S4 and the g-C3N4, and thus the exposure number of the active sites is increased, and the introduction of the MXene can obviously improve the conduction capability ofcarriers, so that the photocatalytic activity of the photocatalyst is obviously improved.

Description

Background technique [0001] The rapid development of the times has also brought an energy crisis to human society. Therefore, it is urgent to vigorously develop renewable energy. Hydrogen energy, known as "future oil", has high combustion value and zero pollution, and has been generally regarded as one of the ideal ways to relieve energy and environmental pressure in the new century. Among the many means of hydrogen energy development, the use of solar photocatalytic water splitting to produce hydrogen is one of the most ideal and promising means for photochemical conversion and storage of solar energy. [0002] Photocatalyst is an essential semiconductor material for the development and utilization of solar energy. In the past three decades, scientists have studied the photocatalytic properties of many semiconductor photocatalysts, such as TiO 2 , RuO 2 , Fe 2 o 3 , CdS, ZnS, CuS / ZnS, CuO / SrTiO 3 , NiO / SrTiO 3 and TiO 2 / g -C 3 N4 etc. Among many semiconductor photo...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J27/22B01J35/10C01B3/04
CPCY02E60/36
Inventor 李魁徐美苓刘福田赵佳慧秦凌志刘灵旺王兆旭
Owner UNIV OF JINAN
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