Cadmium Hydroxypyrazolecarboxylate Coordination Polymer for Catalytic Degradation of Organic Dyes by Visible Light and Its Preparation and Application

A technology of cadmium coordination polymer and hydroxypyrazole carboxylic acid, applied in the field of photocatalytic materials, can solve problems such as secondary pollution of heavy metal ions, and achieve the effects of avoiding secondary pollution, convenient operation and high preparation efficiency

Active Publication Date: 2022-03-04
南通市隆润化工有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, because sulfide ions are easier to dissolve under light, it will cause secondary pollution of heavy metal ions
Therefore, it remains a great challenge to develop new and efficient photocatalysts

Method used

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  • Cadmium Hydroxypyrazolecarboxylate Coordination Polymer for Catalytic Degradation of Organic Dyes by Visible Light and Its Preparation and Application
  • Cadmium Hydroxypyrazolecarboxylate Coordination Polymer for Catalytic Degradation of Organic Dyes by Visible Light and Its Preparation and Application
  • Cadmium Hydroxypyrazolecarboxylate Coordination Polymer for Catalytic Degradation of Organic Dyes by Visible Light and Its Preparation and Application

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] Example 1: Preparation of cadmium hydroxypyrazolecarboxylate coordination polymer for visible light catalytic degradation of organic dyes

[0025] Weigh 5-hydroxypyrazole-3-carboxylic acid (0.05mmol, 0.0064g) and dissolve it in a mixture of 1.6mL DMF and 2mL distilled water to prepare a ligand solution. Weigh cadmium nitrate (0.1mmol, 0.0308g) to dissolve it. Add the cadmium nitrate solution to the ligand solution in 1 mL of distilled water and mix to obtain a transparent and colorless solution, react in a 90°C oven for 2 days, and cool to room temperature to obtain pale yellow bulk crystals, yield: 54.7%. The product was characterized by infrared, and the specific results were: IR (KBr, cm -1 ): 3252(m), 2360(w), 1665(s), 1580(s), 1446(s), 1359(m), 1263(w), 1149(m), 1014(m), 846(w) ), 752(m), 648(m), 570(w).

Embodiment 2

[0026] Example 2: Preparation of cadmium hydroxypyrazolecarboxylate coordination polymer for visible light catalytic degradation of organic dyes

[0027] Weigh 5-hydroxypyrazole-3-carboxylic acid (0.05mmol, 0.0064g) and dissolve it in a mixture of 1mL DMF and 2mL distilled water to prepare a ligand solution, weigh cadmium nitrate (0.1mmol, 0.0308g) and dissolve it in Add the cadmium nitrate solution to the ligand solution in 1 mL of distilled water and mix well to obtain a transparent and colorless solution, react in a 90°C oven for 1 day, and cool to room temperature to obtain pale yellow bulk crystals, yield: 51.4%. The product was characterized by infrared, and the specific results were: IR (KBr, cm -1 ): 3252(m), 2358(w), 1659(s), 1581(s), 1444(s), 1363(m), 1263(w), 1147(m), 1013(m), 848(w) ), 750(m), 649(m), 571(w).

[0028] Infrared test results show that the product of this example is the same as the product of Example 1.

Embodiment 3

[0029] Example 3: Preparation of cadmium hydroxypyrazolecarboxylate coordination polymer for visible light catalytic degradation of organic dyes

[0030] Weigh 5-hydroxypyrazole-3-carboxylic acid (0.05mmol, 0.0064g) and dissolve it in a mixture of 1.5mL DMF and 2mL distilled water to prepare a ligand solution. Weigh cadmium nitrate (0.08mmol, 0.0246g) to dissolve Add the cadmium nitrate solution to the ligand solution in 1 mL of distilled water and mix to obtain a colorless and transparent solution, react in a 100 ℃ oven for 1 day, and cool to room temperature to obtain pale yellow bulk crystals, yield: 53.2%. The product was characterized by infrared, and the specific results were: IR (KBr, cm -1 ): 3250(m), 2361(w), 1667(s), 1580(s), 1442(s), 1360(m), 1259(w), 1148(m), 1015(m), 846(w) ), 753(m), 645(m), 573(w).

[0031] Infrared test results show that the product of this example is the same as the product of Example 1.

[0032] The relevant crystallographic data of the Cd...

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Abstract

The invention discloses a cadmium coordination polymer of hydroxypyrazole carboxylate for visible light catalytic degradation of organic dyes and its preparation and application. The chemical expression of the cadmium coordination polymer is [Cd(hpcH)(H 2 O)(DMF)] n , where hpcH 3 is a 5-hydroxypyrazole-3-carboxylic acid containing 1 metal Cd per asymmetric unit 2+ ion, a deprotonated organic ligand (hpcH 2‑ ), a coordinated water molecule and a coordinated DMF molecule, Cd 2+ The ions are linked by 5-hydroxypyrazole-3-carboxylic acid ligands to form a two-dimensional layered structure. The synthesis method of the cadmium coordination polymer is simple and the yield is high; it has stable photocatalytic dye degradation performance at room temperature, can efficiently photocatalyze the degradation of methylene blue (MB) azo dye, and has a high recycling rate; at the same time, the The structure of the polymer is stable, insoluble in water and common organic solvents, which can avoid secondary pollution problems.

Description

technical field [0001] The invention relates to the technical field of photocatalytic materials, in particular to a cadmium hydroxypyrazole carboxylate coordination polymer capable of catalyzing degradation of organic dyes by visible light, and preparation and application thereof. Background technique [0002] The large-scale discharge of factory wastewater can cause serious environmental problems, and the wastewater generated in many industrial production processes often contains toxic organic compounds, so it is not suitable for direct biological treatment. Taking organic dyes as an example, there are more than 100,000 kinds of commercial dyes on the market, with an annual output of more than 700,000 tons. These organic dyes have stable chemical properties and are not easily degraded in water, which is potentially harmful to the ecological environment. Therefore, in order to better protect the global environment on which we live, it is necessary to research and develop ma...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08G83/00B01J31/22C02F1/30C02F101/30
CPCC08G83/008B01J31/1691B01J31/2239B01J35/004C02F1/30B01J2531/27B01J2531/0238C02F2101/308C02F2305/10
Inventor 杨廷海林陈兰王淑凡王欣陈超越
Owner 南通市隆润化工有限公司
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