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Magnetic cobalt cluster catalyst for degrading triphenylmethane dyes and preparation method thereof

A triphenylmethane and catalyst technology, applied in the field of magnetic cobalt cluster catalysts and its preparation, can solve problems such as cobalt-free cluster catalysts, achieve good market application prospects, and the synthesis method is simple and easy to operate, and the effect of simple operation

Active Publication Date: 2019-04-16
SHANGHAI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the catalysts used in the degradation of crystal violet and malachite green are mostly zinc oxide nanomaterials, titanium dioxide, tungsten trioxide and porous coordination polymers, etc., and there are no reports of cobalt cluster catalysts.

Method used

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  • Magnetic cobalt cluster catalyst for degrading triphenylmethane dyes and preparation method thereof
  • Magnetic cobalt cluster catalyst for degrading triphenylmethane dyes and preparation method thereof
  • Magnetic cobalt cluster catalyst for degrading triphenylmethane dyes and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] Weigh 0.3 mmol of cobalt nitrate, cobalt acetate and cobalt chloride into 2 mL of DMF, stir magnetically until completely dissolved, then weigh 0.3 mmol of 2-(1-hydroxyethyl) benzimidazole into 10 mL of methanol, magnetically stir Stir until completely dissolved, then mix the two solutions, add 300 μL triethylamine, stir magnetically for 30-45 min, filter the solution into a polytetrafluoroethylene autoclave, and move it to a programmable temperature-controlled electric blast drying oven , reacted at 60 °C for three days, then cooled to 30 °C at a cooling rate of 10 °C / h, filtered the solution and left it for three weeks, a large number of brown triangular crystals could be collected, washed with acetone and then air-dried Dry.

Embodiment 2

[0025] Weigh 0.1 mmol of cobalt nitrate, cobalt acetate and cobalt chloride into 1 mL of DMF, stir magnetically until completely dissolved, then weigh 0.1 mmol of 2-(1-hydroxyethyl) benzimidazole into 5 mL of ethanol, magnetically stir Stir until completely dissolved, then mix the two solutions, add 100 μL triethylamine, stir magnetically for 30-45 min, let the solution stand for 24 hours, filter out the supernatant, seal it with a parafilm and leave it for 3 weeks, the collected Few but well-formed brown triangular crystals, washed with acetone and air dried.

Embodiment 3

[0027] Weigh 1 mmol of cobalt nitrate, cobalt acetate and cobalt chloride into 10 mL of DMF, stir magnetically until completely dissolved, then weigh 1 mmol of 2-(1-hydroxyethyl)benzimidazole into 100 mL of ethanol, magnetically stir Stir until completely dissolved, then mix the two solutions, add 1000 μL triethylamine, stir magnetically for 30-45 min, let the solution stand for 24 hours, filter out the supernatant, seal it with a parafilm and let it stand for 3 weeks, it can be collected Numerous and well-formed brown triangular crystals, washed with acetone and air-dried.

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Abstract

The invention discloses a magnetic cobalt cluster catalyst for degrading triphenylmethane dyes and a preparation method thereof. The molecular formula of the catalyst is: [Co Ⅱ 16 Co Ⅲ 4 O 4 (OH) 12 (bme) 12 (OAc) 6 ]Cl 6 ·5CH 3 OH·18H 2 O (Hbme=2-(1-hydroxyethyl)benzimidazole). The cobalt cluster prepared by the present invention can react with 8 mg·L at normal temperature and pressure. ‑1 The triphenylmethane organic dye wastewater has an efficient catalytic degradation effect. The decolorization rate of the crystal violet aqueous solution reaches 98.85% within 30 minutes. The decolorization rate is still as high as 95.54% after 8 cycles, and the degradation products are non-toxic and harmless. Benzoic acid has the advantages of high reusability, stable performance, low price, and environmental friendliness.

Description

technical field [0001] The invention relates to a magnetic cobalt cluster catalyst for degrading triphenylmethane dyes and a preparation method thereof. Background technique [0002] Dyes are widely used in paper, textile, food, rubber production, plastics, cosmetics, pharmaceuticals and other industries. Among them, triphenylmethane dyes are polyphenylene ring compounds, and are the third most widely used dyes after azo dyes and anthraquinone dyes. Some of the dyes and intermediate degradation products have carcinogenic, teratogenic, Mutagenic side effects enter the environment from production, transportation, use and other links, causing environmental pollution and impact on the ecological environment. [0003] Both malachite green and crystal violet are basic triphenylmethane dyes, and their aqueous solution is blue-green. They are similar in structure and have similar properties. They are usually used as fungicides and antiparasitic drugs, mainly used in aquaculture , ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J31/22C02F1/30C02F1/72
CPCC02F1/30C02F1/722B01J31/2217C02F2101/308B01J2531/0238B01J2531/845B01J35/33B01J35/39
Inventor 柏跃玲杜薇
Owner SHANGHAI UNIV
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