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Preparation method for carrollite spinel and application thereof

A technology of sulfur-copper-cobalt ore and spinel, applied in chemical instruments and methods, water pollutants, physical/chemical process catalysts, etc., can solve problems such as large dosage, instability and easy dissolution of single metal sulfide , to achieve the effects of fast reaction speed, stable structure and high catalytic efficiency

Inactive Publication Date: 2019-05-17
HARBIN INST OF TECH
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AI Technical Summary

Problems solved by technology

[0005] In order to solve the problem of large dosage of the existing double metal oxide in the process of catalytic monopersulfate degradation of organic pollutants in water, and the problem of easy dissolution in the advanced oxidation process caused by the instability of single metal sulfide, Propose a preparation method and application of sulfur copper cobalt ore spinel

Method used

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  • Preparation method for carrollite spinel and application thereof
  • Preparation method for carrollite spinel and application thereof
  • Preparation method for carrollite spinel and application thereof

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specific Embodiment approach 1

[0030]Specific embodiment one: the preparation method of pyrocopper-cobalt ore spinel in this embodiment is carried out according to the following steps: dissolve the cobalt ion salt and the copper ion salt in ultrapure water, stir until a clear solution is obtained, and slowly add Thiourea, then vigorously stir until the thiourea is completely dissolved to obtain a transparent and uniform solution; add excess ethylenediamine to the transparent and uniform solution to obtain a dark brown liquid, heat the dark brown liquid at high temperature for hydrothermal reaction, hydrothermal After the reaction is completed, the obtained solid product is cooled to room temperature, and then the solid product is washed several times with ultrapure water and ethanol in sequence, and finally dried to obtain a sulfocopper-cobalt spinel.

[0031] 1. The specific reaction mechanism of this embodiment is that, as a heterogeneous catalyst, the transition metal copper on the surface and the transit...

specific Embodiment approach 2

[0042] Embodiment 2: This embodiment is different from Embodiment 1 in that: the cobalt ion salt is cobalt nitrate, cobalt sulfate or cobalt acetate; the copper ion salt is copper nitrate, copper sulfate or copper acetate. Other steps and parameters are the same as those in the first embodiment.

specific Embodiment approach 3

[0043] Embodiment 3: This embodiment differs from Embodiment 1 or Embodiment 2 in that the concentration of cobalt ions in the clarified solution is 0.4-0.8 mmol / L. Other steps and parameters are the same as those in Embodiment 1 or 2.

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Abstract

The invention provides a preparation method for carrollite spinel and an application thereof and relates to the preparation and application of carrollite spinel. The preparation method comprises the following steps: dissolving cobalt ion salt and cupric ion salt in ultrapure water and adding thiourea; dissolving and then adding excessive quadrol, and performing hydrothermal reaction, thereby acquiring a solid product; cleaning and drying the solid product. The application is as follows: free sulfate radicals generated by activation of persulfate under the effect of carrollite spinel are utilized to degrade organic pollutants in water, under the condition of taking the carrollite spinel as a catalyst and monopersulfate as an oxidizing agent. According to the invention, transition metals copper and cobalt on the surface of carrollite spinel are capable of catalyzing monopersulfate to decompose and generate free sulfate radicals with strong oxidizing property in the manner of changing valence state, and the free sulfate radicals react with organic pollutants so as to decompose and even mineralize the organic pollutants. The carrollite spinel prepared according to the invention has a stable structure, is high in catalyzing efficiency and is reusable. The invention is suitable for preparing carrollite spinel and catalyzing monopersulfate to degrade organic pollutants in water.

Description

technical field [0001] The invention relates to a preparation method and application of spinel. Background technique [0002] With the rapid development of my country's economy and the rapid advancement of urbanization, the excessive exploitation of water resources and substandard sewage discharge have caused further deterioration of the water source environment. Water and water quality type water shortage transformation. With the continuous expansion of the scope of human living activities and the rapid development of the types and scale of industrial and agricultural production, the types and corresponding concentrations of pollutants in natural water bodies are also increasing, and more than 85% of the pollution is organic pollution. Organic pollutants in water can be divided into two categories according to their sources, namely natural organic matter and synthetic organic matter. Most of the artificially synthesized organic substances are toxic organic pollutants, whic...

Claims

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Application Information

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IPC IPC(8): B01J27/043C02F1/72C02F101/34
Inventor 马军徐浩丹汪达卢晓辉陈志强
Owner HARBIN INST OF TECH
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