High-entropy metal sulfide CdFeCoNiCuSx and preparation method and application thereof

By developing high-entropy metal sulfide CdFeCoNiCuSx and synthesizing it using Joule heating technology, the problem of poor stability of existing catalysts at acidic pH is solved, and stability over a wide pH range and efficient Fenton-like oxidation and degradation performance are achieved.

CN119706972AActive Publication Date: 2025-03-28HUNAN UNIV
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Patent Information

Application Number
CN202411906069.0
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2024-12-23
Publication Date
2025-03-28
Estimated Expiration
2044-12-23

AI Technical Summary

Technical Problem

Existing catalysts are prone to aggregation and corrosion at acidic pH, reducing their catalytic activity and stability, and limiting their application in wastewater treatment.

Method used

A high-entropy metal sulfide CdFeCoNiCuSx is developed, which is rapidly synthesized through Joule heating technology to achieve its stability within a wide pH range, and the interaction between catalysts and pollutants is improved through the synergistic effect of multi-elements, changing the charge state in metal sulfides, and accelerating the interface charge transfer.

Benefits of technology

The efficient Fenton-like oxidation degradation performance is achieved, and the degradation performance of the catalyst remains basically unchanged during multiple cycles, with excellent structural and catalytic stability.

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Abstract

The invention discloses a high-entropy metal sulfide CdFeCoNiCuSx as well as a preparation method and application thereof. The preparation method comprises the following steps: firstly, mixing ethanol and thiourea to form a eutectic solvent; then adding Cd salt, Fe salt, Co salt, Ni salt and Cu salt into the eutectic solvent in equal molar weight according to the mole number of the contained metal, heating and stirring until the materials are fully mixed to obtain a precursor; under the protective atmosphere, the precursor is placed in a Joule heating instrument to be subjected to a reaction, and the high-entropy metal sulfide CdFeCoNiCuSx is obtained and used for Fenton-like oxidative degradation of tetracycline. The high-entropy metal sulfide has good structural stability, the stability of the high-entropy metal sulfide in a wide pH range is guaranteed, meanwhile, the interaction between a catalyst and tetracycline is improved through the synergistic effect of specific metal elements, so that the charge state in the metal sulfide is changed, interface charge transfer is effectively accelerated, and the performance of the tetracycline catalyst is improved. The diffusion process of the tetracycline is improved, and efficient degradation of the tetracycline is realized.
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