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Rare earth praseodymium complex for efficient photodegradation of azo dyes, preparation method and application thereof

A technology for azo dyes and complexes, which is applied in the field of rare earth praseodymium complexes and their preparation, and can solve the problems of difficult degradation of dyes

Active Publication Date: 2019-06-25
ANHUI NORMAL UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] The object of the present invention is to provide a kind of rare earth praseodymium complex and synthetic method thereof of effective photodegradation azo dye, this novel rare earth praseodymium complex has good stability and photocatalytic degradation azo dye (MB) performance, simultaneously the preparation The method is simple and solves the problem of difficult degradation of dyes

Method used

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  • Rare earth praseodymium complex for efficient photodegradation of azo dyes, preparation method and application thereof
  • Rare earth praseodymium complex for efficient photodegradation of azo dyes, preparation method and application thereof
  • Rare earth praseodymium complex for efficient photodegradation of azo dyes, preparation method and application thereof

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Experimental program
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Effect test

Embodiment 1

[0043] 1) Add 0.12mmol Pr(NO 3 ) 3 ·6H 2 O, the mixture of 0.0168mmol 2,2'-bipyridine-4,4'-dicarboxylic acid, 0.008mmol 4,4'-bis(1H-imidazole-1-substituted)-1,1'-biphenyl, Put it into a polytetrafluoroethylene liner, and then add 5mL of a mixed solution of N,N-dimethylformamide and water (the volume ratio of N,N-dimethylformamide and water is 1:4), 25 Ultrasonic vibration at ℃ for 5 min;

[0044] 2) Put the reaction kettle with the above mixed solution into an oven, react at a constant temperature of 60°C for 48 hours, then naturally cool down to 31°C, and separate the solid and liquid;

[0045] 3) The above solid was washed several times with the mother liquor, and then dried naturally at 25° C. to obtain dark green cubic crystals with a yield of about 76.7%.

Embodiment 2

[0047] Carried out in the manner of Example 1, the yield was 74.3%, except that the reaction temperature in step 2) was 65°C.

Embodiment 3

[0049] Carried out in the manner of Example 1, the yield was 71.9%, except that the reaction temperature in step 2) was 70°C.

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Abstract

The invention belongs to the field of photocatalytic degradation of dyes, and specifically relates to a new type of rare earth praseodymium complex that can effectively photodegrade azo dyes and its preparation method and application. This preparation method introduces a pyridine carboxylic acid-type ligand that has coordination effects on rare earth ions into the polymer side group, and then combines it with Pr 3+ Coordinated to obtain a new type of rare earth praseodymium complex that photodegrades azo dye dye. The chemical formula of this complex is {[Pr(L 2‑ ) 1.5 (DMF)(H 2 O) 2 ](DMF)} n , in the formula: L 2‑ It is the group after removing two protons from 2,2'-bipyridyl-4,4'-dicarboxylic acid. DMF is N,N-dimethylformamide, and n represents a natural number from 1 to positive infinity. The new rare earth praseodymium complex effectively solves the problem of difficult degradation of azo dyes.

Description

technical field [0001] The invention relates to a praseodymium metal complex, in particular to a rare earth praseodymium complex capable of effectively photodegrading azo dyes, a preparation method and application thereof. Background technique [0002] Coordination polymers, also known as metal-organic frameworks (Metal-Organic Frameworks, abbreviated as MO Fs), refer to the interaction between metal atoms or atomic clusters and organic ligands through covalent bonds, coordination bonds, and intermolecular interactions. A crystalline material with a periodic network structure formed by polymerization. [0003] Rare earth coordination chemistry is one of the research hotspots in the field of rare earth chemistry. Rare earths are the lanthanide elements in the periodic table of elements. Complexes. Rare earth complexes are complexes formed by rare earth metal ions and oxygen-containing, nitrogen-containing organic ligands through coordination and bonding. Rare earth complexe...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C07F5/00B01J31/22A62D3/176A62D101/26
CPCA62D3/176C07F5/003B01J31/1805B01J31/1815A62D2101/26C07B2200/13B01J35/39
Inventor 季长春白秀芳徐东浩尹丽盛恩宏
Owner ANHUI NORMAL UNIV
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