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A functionalized metal-organic framework material and its preparation method and application
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A metal-organic framework and functionalization technology, applied in chemical instruments and methods, organic compound/hydride/coordination complex catalysts, chemical/physical processes, etc., can solve problems such as secondary pollution and lack of reaction rate, and achieve The effect of large conjugate plane, good optical response and good photocatalytic effect
Active Publication Date: 2022-04-12
THE NAT CENT FOR NANOSCI & TECH NCNST OF CHINA
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The application of different semiconductor materials to the photocatalytic reduction of chromium (VI) ions is lacking in the reaction rate, and some photocatalysts will also cause secondary pollution to the environment due to their high toxicity.
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Embodiment 1
[0035] The embodiment of the present invention provides a method for preparing a functionalized metal-organic framework material, such as figure 1 As shown, the specific steps are as follows:
[0036] S1. Add 0.13g of aminoterephthalic acid and 0.17g of zirconium tetrachloride to 8mL of N,N-dimethylformamide, and stir at 25°C for 30min until dissolved, then add 0.8mL of formic acid aqueous solution, stir and mix After 2 minutes, a clear yellow solution was obtained, and then the obtained yellow solution was transferred to an autoclave, subjected to hydrothermal reaction at 120°C for 24 hours, and filtered to obtain a white powder, which was the metal-organic framework material (UiO-66-NH 2 );
[0037] S2, the 171mg metal-organic framework material (UiO-66-NH 2 ) powder dispersed in 50mL of acetonitrile, add 50.2μL of benzaldehyde, and react in an oil bath at 80°C for 12h. Alloyed metal-organic frameworks (UiO-66-Ba).
Embodiment 2
[0039] The embodiment of the present invention provides a method for preparing a functionalized metal-organic framework material, and the specific steps are as follows:
[0040] S1. Add 0.13g of aminoterephthalic acid and 0.17g of zirconium tetrachloride to 8mL of N,N-dimethylformamide, and stir at 25°C for 30min until dissolved, then add 0.8mL of formic acid aqueous solution, stir and mix After 2 minutes, a clear yellow solution was obtained, and then the obtained yellow solution was transferred to an autoclave, subjected to hydrothermal reaction at 120°C for 24 hours, and filtered to obtain a white powder, which was the metal-organic framework material (UiO-66-NH 2 );
[0041] S2, the 171mg metal-organic framework material (UiO-66-NH 2 ) powder dispersed in 50mL of acetonitrile, add 62.5μL of salicylaldehyde, and react in an oil bath at 80°C for 12h. Functionalized Metal Organic Frameworks (UiO-66-Sal).
[0042] Such as figure 2 Shown is the metal-organic framework mate...
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Abstract
The invention discloses a functionalized metal-organic framework material and its preparation method and application. The preparation method comprises: preparing the metal-organic framework material through a one-step solvothermal method, and then obtaining the functionalized metal-organic framework material by using a method of functional group modification; The specific surface area and pore volume of the prepared functionalized metal-organic framework materials are 700-900m 2 / g and 0.10‑0.17cm 3 / g, and good crystallinity. The method provided by the present invention has scientific and reasonable design, simple and controllable process, readily available and cheap raw materials, low production cost, high efficiency, is suitable for large-scale production, and has broad prospects for commercial application; the application of the product in the fields of fluorescence, molecular recognition and photocatalysis It has broad prospects and great theoretical and practical significance.
Description
technical field [0001] The invention relates to the technical field of functionalized metal-organic framework materials, in particular to a functionalized metal-organic framework material and its preparation method and application. Background technique [0002] Chromium (VI) ion is a typical heavy metal ion pollutant, which is usually produced in industrial production processes such as tanning, paint and steel manufacturing. Chromium(VI) ion is a carcinogen and its toxicity has been shown to cause mutagenic hazards in most organisms. At present, the photocatalytic reduction of chromium(VI) ions to environmentally harmless chromium(III) ions using semiconductor photocatalysts is one of the most effective methods for removing chromium(VI) ions in wastewater. The application of different semiconductor materials to the photocatalytic reduction of chromium (VI) ions has a lack of reaction rate, and some photocatalysts will also cause secondary pollution to the environment due to...
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