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Cadmium metal organic framework material as well as preparation method and application thereof

An organic framework, cadmium metal technology, applied in chemical instruments and methods, other chemical processes, water/sludge/sewage treatment, etc. The effect of low temperature and simple preparation process

Inactive Publication Date: 2019-11-22
LINYI UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Ionic metal-organic framework materials have shown great application prospects in the adsorption and separation of dyes, but there are few ionic metal-organic framework materials currently synthesized

Method used

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  • Cadmium metal organic framework material as well as preparation method and application thereof
  • Cadmium metal organic framework material as well as preparation method and application thereof
  • Cadmium metal organic framework material as well as preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] 8mg Cd(NO 3 ) 2 ·3H 2 O and 6 mg H 5 L was added to a 10mL glass bottle; 4mL of DMF / C with a volume ratio of 2:1:2 was added to the glass bottle 2 h 5 OH / H 2 O and add 0.1mL of nitric acid solution dropwise to this mixed solution, seal the mixed solution, put it into a blast drying oven, and slowly heat it from room temperature to 90°C. The temperature was maintained at 90°C for 3000 min, and then the mixture was cooled to 30°C at a rate of 7°C / h to obtain white needle-like crystals.

[0037] According to elemental analysis and single crystal diffraction data to determine the content of C, N, O, the elemental analysis results are shown in Table 1, and then determine the chemical formula of the metal organic framework material is C 28 Cd 3 o 15 h 32 N 2 .

[0038] Table 1 Elemental analysis results of white needle-like crystals

[0039] H / ％ C / ％ N / ％ measured value 4.01 34.90 3.34 Calculated 3.69 35.40 3.10

[0040] refer to Fi...

Embodiment 2

[0042] 9mg Cd(NO 3 ) 2 ·3H 2 O and 5 mg H 5 L was added to a 10mL glass bottle; 4mL of DMF / C with a volume ratio of 2:1:2 was added to the glass bottle 2 h 5 OH / H 2 O and add 0.1mL of nitric acid solution dropwise to this mixed solution, seal the mixed solution, put it into a blast drying oven, and slowly heat it from room temperature to 87°C. The temperature was maintained at 87 °C for 3000 min, and then the mixture was cooled to 25 °C at a rate of 6 °C / h to obtain white needle-like crystals.

[0043] Such as Figure 5 As shown, it can be seen from the figure that within the temperature range of 0-800°C, the thermogravimetric curve shows three distinct declines; in the first stage, 40°C-98°C, it corresponds to the loss of crystal water; In the second stage 98°C-240°C, the weight loss is 36.52%, the DMF solvent is lost, and the water molecules are coordinated. Above 360°C, the crystal skeleton begins to collapse.

Embodiment 3

[0045] 9mg Cd(NO 3 ) 2 ·3H 2 O and 5 mg H 5 L was added to a 10mL glass bottle; 4mL of DMF / C with a volume ratio of 2:1:2 was added to the glass bottle 2 h 5 OH / H 2 O and add 0.1mL of nitric acid solution dropwise to this mixed solution, seal the mixed solution, put it into a blast drying oven, and slowly heat it from room temperature to 92°C. The temperature was maintained at 92°C for 3000 min, and then the mixture was cooled to 30°C at a rate of 8°C / h to obtain white needle-like crystals.

[0046] The obtained white needle-like crystals were subjected to a powder diffraction test experiment, and the powder diffraction test (PXRD) was used to detect the phase purity of the prepared cadmium metal organic framework material at room temperature. Such as Figure 6 As shown, the diffraction pattern of the experimentally synthesized crystal sample is consistent with the diffraction pattern derived from the single crystal data cif file, indicating that the crystal sample cadm...

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Abstract

The invention provides a cadmium metal organic framework material as well as a preparation method and application thereof. The cadmium metal organic framework material is a three-dimensional porous material, and belongs to a monoclinic system, and the space group is P21 / c; and cell parameters are as follows: alpha / deg = 90.0, beta / deg = 101.2196 (11) and gamma / deg = 90.0. The cadmium metal organicframework material disclosed by the invention is a three-dimensional porous material, and a preparation process is simple, strong in operability, low in reaction temperature and high in process safety. An anionic cadmium metal organic framework material is constructed by using a pentacarboxylic acid ligand, and carboxyl on an intermediate benzene ring does not participate in coordination and extends into pore channels in a deprotonation form, so that -COO- exposed in the pore channels and cationic dye generate strong electrostatic interaction. The anionic cadmium metal organic framework material has columnar pores, and can separate dye according to the molecular size and electrification of dye molecules. The dye subjected to adsorption separation can be desorbed, recycled and utilized.

Description

technical field [0001] The invention relates to a cadmium metal organic framework material and its preparation method and application, belonging to the technical field of functional materials. Background technique [0002] With the rapid development of social productivity and science and technology, fiber, paint, plastic, printing, cosmetics, food processing, pharmaceutical and other related industries are expanding rapidly at home and abroad, and the demand is growing steadily. According to statistics, my country's dye production ranks first in the world. However, most organic dyes are toxic and difficult to degrade under light conditions. Therefore, a large amount of organic dyes are used and discharged, causing serious pollution to the environment and land, and causing huge hidden dangers to human health and biological survival. Low-consumption and high-efficiency removal of discharged dyes is an urgent problem to be solved at present. [0003] Traditional methods for p...

Claims

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Application Information

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IPC IPC(8): C08G83/00B01J20/22C02F1/28C02F101/30C02F101/38
CPCB01J20/226C02F1/285C02F2101/308C02F2101/38C02F2101/40C08G83/008
Inventor 刘秀萍王依军郝春联刘复凯张恒彬
Owner LINYI UNIVERSITY
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