Nickel pyridine methylene phosphonate coordination polymer as well as preparation method and application thereof

A technology of pyridylmethylene phosphonic acid and coordination polymers, applied in organic compound/hydride/coordination complex catalysts, chemical instruments and methods, chemical/physical processes, etc., can solve the problem that photocatalysts cannot be recycled and reused and other issues, to achieve the effect of high stability and high photochemical activity

Active Publication Date: 2019-09-10
JIANGSU UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] In order to solve the technical problems that most photocatalysts in the prior art cannot effectively utilize the visible light in the sunlight band to catalyze and degrade pollutants and the photocatalysts cannot be recycled and reused, a nickel pyridylmethylene phosphonate coordination polymer and Its preparation method and its application in photocatalytic degradation of pollutants, especially its application in catalytic degradation of methylene blue

Method used

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  • Nickel pyridine methylene phosphonate coordination polymer as well as preparation method and application thereof
  • Nickel pyridine methylene phosphonate coordination polymer as well as preparation method and application thereof
  • Nickel pyridine methylene phosphonate coordination polymer as well as preparation method and application thereof

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Embodiment 1

[0028] The preparation method of the nickel pyridyl methylene phosphonate coordination polymer of the present embodiment is as follows:

[0029] Weigh 4-pyridinemethylenephosphonic acid (0.1mmol, 0.0173g) and nickel acetate (0.1mmol, 0.0249g), dissolve it in 8mL of distilled water, stir and mix evenly with ultrasonic, and measure the pH of the mixture with a pH meter to be 5.3. Put the mixed solution in a high-pressure hydrothermal kettle lined with polytetrafluoroethylene, and place the hydrothermal kettle in a closed oven at 120°C for heating reaction. After the reaction for 80 hours, naturally cool to room temperature, filter, wash, and dry to obtain Target product, marked 1. Yield 52.8%. Product 1 was characterized by PXRD, such as figure 2 As shown, the structure of the product of this example is consistent with the simulation results of theoretical values, indicating that the product is very pure.

Embodiment 2

[0031] The preparation method of the nickel pyridyl methylene phosphonate coordination polymer of the present embodiment is as follows:

[0032] Weigh 4-pyridylmethylenephosphonic acid (0.1mmol, 0.0173g) and nickel acetate (0.1mmol, 0.0249g), dissolve it in 6mL of distilled water, stir and mix evenly with ultrasonic, and measure the pH value of the mixture with a pH meter to be 5.3. The mixed solution was placed in a high-pressure hydrothermal kettle lined with polytetrafluoroethylene, and the hydrothermal kettle was placed in a closed oven at 120°C for heating reaction. After the reaction was completed for 72 hours, it was naturally cooled to room temperature, filtered, washed, and dried to obtain Target product, marked 2. Yield 50.7%. Product 2 was characterized by PXRD, such as figure 2 Shown, PXRD test result shows, the product of the present embodiment is identical with the product of embodiment 1.

Embodiment 3

[0034] The preparation method of the nickel pyridyl methylene phosphonate coordination polymer of the present embodiment is as follows:

[0035] Weigh 4-pyridinemethylenephosphonic acid (0.1mmol, 0.0173g) and nickel acetate (0.1mmol, 0.0249g), dissolve it in 10mL of distilled water, and mix well by ultrasonic stirring. The mixed solution was placed in a high-pressure hydrothermal kettle lined with polytetrafluoroethylene, and the hydrothermal kettle was placed in a closed oven at 130°C for heating reaction. After the reaction was completed for 72 hours, it was naturally cooled to room temperature, filtered, washed, and dried to obtain Target product, marked 3. Yield 45%. Product 3 was characterized by PXRD, such as figure 2 Shown, PXRD test result shows, the product of the present embodiment is identical with the product of embodiment 1.

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Abstract

The invention relates to a nickel pyridine methylene phosphonate coordination polymer as well as a preparation method and application thereof. The nickel pyridine methylene phosphonate coordination polymer has a molecular formula of [Ni(4-pmp)(H2O)3]n, belongs to a monoclinic system and has P21 / c space groups, and a space accumulation structure is of a two-dimensional layered structure. The coordination polymer prepared by the method disclosed by the invention has a high photocatalytic degradation rate on methylene blue under visible light conditions, and the degradation rate is up to 71.7%; and after the methylene blue is subjected to photocatalytic degradation of 3 cycles, the structure of the coordination polymer disclosed by the invention is not changed, the coordination polymer has high stability and high photochemical activity, is basically invariable in photocatalytic effect of the methylene blue, can be recycled, meets requirements of green materials, and provides a new selection for degradation of azo dyes.

Description

technical field [0001] The invention relates to the technical field of coordination polymers, in particular to a nickel pyridylmethylene phosphonate coordination polymer and its preparation method, and its application in photocatalytic degradation of azo dyes, especially its application in catalytic degradation of methylene blue . Background technique [0002] Photocatalytic technology has attracted widespread attention because of its ability to utilize abundant solar energy to effectively degrade pollutants. At present, research in the field of photocatalysis mainly focuses on two types of photocatalytic systems. One is the heterogeneous photocatalyst of inorganic semiconductor represented by titanium dioxide. Although it has high stability and photocatalytic activity, they can only be excited by ultraviolet light. The ultraviolet region only accounts for about 5% of the entire solar spectrum, and the composition and crystal phase adjustment of inorganic semiconductors can...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G83/00B01J31/22
CPCB01J31/1691B01J31/2217C08G83/008
Inventor 杨廷海仇丽君孙明慧王琦王欣
Owner JIANGSU UNIV OF TECH
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