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A kind of organic calcium phosphonate coordination polymer and its preparation method and application

A technology of coordination polymer and calcium phosphonate, applied in chemical instruments and methods, water pollutants, oxidized water/sewage treatment, etc., can solve the problems of membrane pollution limitation, high cost, reduced productivity, etc., and achieve good repeatability , the effect of easy availability of raw materials and low cost

Active Publication Date: 2021-12-21
JIANGSU UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the high cost of membranes and equipment, with reduced productivity over time, is extremely limited due to membrane fouling

Method used

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  • A kind of organic calcium phosphonate coordination polymer and its preparation method and application
  • A kind of organic calcium phosphonate coordination polymer and its preparation method and application
  • A kind of organic calcium phosphonate coordination polymer and its preparation method and application

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] Dissolve hydroxyethylidene diphosphonic acid (0.0103g, 0.05mmol) and calcium chloride (0.0147g, 0.1mmol) in 2mL of water, mix well, add ammonia water to adjust pH = 3, under airtight conditions, at 120°C After reacting for 24 hours, and then naturally cooling to room temperature, a colorless rectangular block crystal of the calcium coordination polymer was obtained, and the single crystal yield was 65%.

Embodiment 2

[0026] Dissolve hydroxyethylidene diphosphonic acid (0.0103g, 0.05mmol) and calcium nitrate tetrahydrate (0.0236g, 0.1mmol) in 4mL of water, mix well, add ammonia water to adjust pH = 5, under airtight conditions, at 160°C The reaction was carried out under low temperature for 36 hours, and then naturally cooled to room temperature to obtain a colorless rectangular block crystal of the calcium coordination polymer with a single crystal yield of 73%.

[0027] The calcium coordination polymers prepared in the above examples have good water and thermal stability.

[0028] X-ray single crystal diffraction was performed on the colorless rectangular block crystals prepared in Example 1, and the crystallographic data obtained are shown in Table 1.

[0029] Table 1 is the crystallographic data of the coordination polymer single crystal obtained in Example 1

[0030]

[0031] It can be known from Table 1 that the calcium coordination polymer crystals belong to the monoclinic system...

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Abstract

The invention belongs to the technical field of coordination polymers, and in particular relates to an organic calcium phosphonate coordination polymer and its preparation method and application. The calcium coordination polymer has a chemical formula of [Ca 2 (hedp)H 2 O] n , wherein n is a positive integer, hedp is a hydroxyl ethylidene diphosphonate ion, and the molecular structure of the calcium coordination polymer is as follows. The calcium coordination polymer has good photocatalytic performance, high water stability and thermal stability, and the degradation rates of methylene blue (MB) and basic magenta (PR) under the condition of light are all the same. Up to 95%, it can be used for wastewater treatment containing MB and PR dyes.

Description

technical field [0001] The invention belongs to the technical field of coordination polymers, and in particular relates to an organic calcium phosphonate coordination polymer and its preparation method and application. Background technique [0002] As the world's population continues to grow and human activities increase, the demand for clean water continues to increase, while its availability decreases. Among them, the textile printing and dyeing industry uses and pollutes a large amount of water, and nearly 1 million tons of dyes are produced in the world every year. They are structurally diverse complex aromatic compounds with high chemical, biological and photocatalytic stability. Water pollution caused by organic dyes is particularly serious. Dye wastewater affects the quality and properties of water. Benzene rings in organic dyes can easily cause cancer and endanger human health. It is for this reason that many studies have focused on the removal of organic dyes from...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08G83/00C02F1/72C02F1/30C02F101/30C02F101/38
CPCC08G83/008C02F1/725C02F1/30C02F2101/308C02F2101/38
Inventor 杨廷海王琦王欣林陈兰孙明慧
Owner JIANGSU UNIV OF TECH