A natural chalcopyrite gel catalyst, its preparation method and application thereof

CN122912915APending Publication Date: 2026-10-16NANJING NORMAL UNIVERSITY
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Patent Information

Application Number
CN202611181931.5
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2026-08-05
Publication Date
2026-10-16

AI Technical Summary

Technical Problem

然而，目前用于活化过硫酸盐的黄铜矿催化剂主要以实验室合成品为主，天然黄铜矿直接用于活化过硫酸盐的研究却相对较少，未能实现天然矿物资源的高效利用

Benefits of technology

[0012]This invention provides a method for preparing a natural chalcopyrite gel catalyst for activating persulfate degradation of acetaminophen. The method involves pulverizing natural chalcopyrite and washing it with ethanol and pure water to remove dust and other impurities from the surface of the natural mineral, exposing the surface active sites of the catalyst. By calcining a mixture of natural chalcopyrite and urea, chalcopyrite can be composited with carbon nitride. This composite undergoes interfacial electron rearrangement, shifting the d-band centers of Fe and Cu, promoting the formation of metal-N coordination structures between the metal sites of chalcopyrite and N, regulating the electron cloud distribution and local coordination environment around the Fe and Cu sites, and causing the metals to transition to higher valence states, generating more stable Fe(IV) and Cu(III), which are more readily involved in the persulfate activation process. This promotes the degradation of acetaminophen through a synergistic pathway of free radicals and non-free radicals. The natural chalcopyrite gel catalyst is prepared by mixing carbon nitride-loaded chalcopyrite powder with sodium alginate and then reacting it with calcium chloride solution to form a crosslinking reaction. This fixation of the powdered catalyst facilitates recovery. The combination of carbon nitride and chalcopyrite enables the natural chalcopyrite gel catalyst of this invention to significantly improve the efficiency of activating persulfate degradation of acetaminophen, while also facilitating recycling and reuse. This makes the combination of carbon nitride and chalcopyrite more stable and also reduces metal ion leaching.

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Abstract

The application discloses a preparation method and application of a natural chalcopyrite gel catalyst. The application washes and dries the crushed natural chalcopyrite with ethanol and deionized water; uniformly mixes the natural chalcopyrite with urea, and then puts the mixture into a muffle furnace for continuous calcination; grinds, washes and dries the obtained chalcopyrite powder loaded with carbon nitride; uniformly mixes the chalcopyrite powder loaded with carbon nitride with sodium alginate powder, and then adds pure water to the mixture for ultrasonic stirring to form a mixed homogeneous solution; extracts the mixed homogeneous solution, and then drops the solution into a calcium chloride solution for cross-linking to form gel balls; and finally, the gel balls are washed with deionized water to obtain the natural chalcopyrite gel catalyst. The natural chalcopyrite gel catalyst has excellent performance in activating peroxymonosulfate to degrade acetaminophen, and has the advantages of low cost, easy availability of raw materials and good cycle performance.
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