Eutectic solvent etched lithium cobalt oxide catalyst as well as preparation method and application thereof

A technology of deep eutectic solvent and lithium cobaltate, applied in the field of water treatment, can solve the problems of high raw material cost, serious secondary pollution, complex synthesis process, etc., achieve small secondary pollution, good catalytic effect, and simple etching process safe effect

Pending Publication Date: 2021-04-16
SHANGHAI UNIVERSITY OF ELECTRIC POWER
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The commonly used metal oxide catalysts or supported metal oxide catalysts have problems such as complex synthesis process, high cost of raw materials and serious secondary pollution.

Method used

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  • Eutectic solvent etched lithium cobalt oxide catalyst as well as preparation method and application thereof
  • Eutectic solvent etched lithium cobalt oxide catalyst as well as preparation method and application thereof
  • Eutectic solvent etched lithium cobalt oxide catalyst as well as preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] A kind of deep eutectic solvent etching lithium cobalt oxide catalyst

[0032] The preparation method of the deep eutectic solvent etching lithium cobalt oxide catalyst provided in this embodiment comprises the following steps:

[0033] (1) After mixing choline chloride and ethylene glycol at a molar ratio of 1:2, stir continuously at 60°C until clear and transparent, prepare a deep eutectic solvent and store it at 60°C;

[0034] (2) Mix lithium cobaltate and deep eutectic solvent into a high-temperature glass bottle according to a solid-to-liquid ratio of 20g / L, and keep the glass bottle in an oil bath for 4 hours at a temperature of 180°C;

[0035] (3) The lithium cobalt oxide and the deep eutectic solvent after etching are separated by suction filtration, and the solid product is washed alternately with alcohol and water several times to remove the deep eutectic solvent remaining on the solid surface, and a low eutectic solvent is obtained. Eutectic solvent etching ...

Embodiment 2

[0044] The preparation method of the deep eutectic solvent etching lithium cobalt oxide catalyst provided in this embodiment comprises the following steps:

[0045] (1) Choline chloride and ethylene glycol were mixed at a molar ratio of 1:2 and stirred continuously at 60°C until clear and transparent, and the deep eutectic solvent was prepared and stored at 60°C.

[0046](2) Mix lithium cobaltate and deep eutectic solvent into a high-temperature glass bottle according to a solid-to-liquid ratio of 30g / L, and keep the glass bottle in an oil bath for 6 hours at a temperature of 200°C.

[0047] (3) Use 6000 ram / min centrifugation to separate the lithium cobaltate and deep eutectic solvent after etching, and wash the precipitate with alcohol and water alternately several times to remove the deep eutectic solvent remaining on the solid surface, which is the obtained catalyst.

[0048] The deep eutectic solvent etching lithium cobaltate catalyst that embodiment 2 makes is carried o...

Embodiment 3

[0052] The preparation method of the deep eutectic solvent etching lithium cobalt oxide catalyst provided in this embodiment comprises the following steps:

[0053] (1) Choline chloride and ethylene glycol were mixed at a molar ratio of 1:2 and stirred continuously at 70°C until clear and transparent, and the deep eutectic solvent was prepared and stored at 60°C.

[0054] (2) Mix lithium cobaltate and deep eutectic solvent into a high-temperature glass bottle according to a solid-to-liquid ratio of 20g / L, and keep the glass bottle in an oil bath for 6 hours at a temperature of 180°C.

[0055] (3) Use suction filtration to separate the etched lithium cobaltate and the deep eutectic solvent, and alternately wash the lithium cobaltate several times with alcohol and water to remove the deep eutectic solvent remaining on the solid surface, which is the obtained catalyst.

[0056] The deep eutectic solvent etching lithium cobaltate catalyst that embodiment 3 is made carries out per...

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Abstract

The invention provides a eutectic solvent etched lithium cobalt oxide catalyst, and a preparation method and application thereof, and belongs to the field of water treatment. The provided eutectic solvent etched lithium cobalt oxide catalyst is lithium cobalt oxide etched by a eutectic solvent. The invention also provides a preparation method of the eutectic solvent etched lithium cobalt oxide catalyst. The preparation method comprises the following steps: step 1, adding lithium cobalt oxide and a eutectic solvent into a container, and keeping the temperature at 150-200 DEG C for 2-6 hours to obtain an etching blend; and step 2, carrying out suction filtration and separation on the etching blend, taking the solid, and washing to obtain the product. According to the eutectic solvent etched lithium cobalt oxide catalyst, more lithium is removed and more cobalt is remained, so that more active sites can be provided, and a better catalytic effect is achieved. Besides, no strong acid or alkali agent is introduced in the preparation process, and complex reaction conditions are not needed, so that the whole etching process is simple, convenient and safe, and the secondary pollution is small.

Description

technical field [0001] The invention relates to the field of water treatment, in particular to a deep eutectic solvent etching lithium cobalt oxide catalyst, a preparation method and an application thereof. Background technique [0002] Advanced oxidation technology is a water treatment technology that has emerged in recent years. It has received extensive research because of its ability to efficiently degrade organic pollutants. The advanced oxidation technology based on the generation of sulfate radicals is the focus of advanced oxidation technology research. The general process of generating free radicals by activating persulfate includes different activation methods such as thermal activation, ultraviolet activation, and catalyst activation. Among them, the process of catalyst activation has attracted more attention due to its simple reaction conditions and industrial potential. [0003] The research focuses on the development of various types of catalysts for the advanc...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/75B01J23/78C02F1/72C02F101/30C02F101/34C02F101/36C02F101/38
Inventor 时鹏辉郭灏王鹏飞唐梦阳侯伟范金辰闵宇霖徐群杰
Owner SHANGHAI UNIVERSITY OF ELECTRIC POWER
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