Preparation method of narrow-band-gap organic semiconductor carbon composite photocatalyst for degrading ciprofloxacin

By combining organic photovoltaic materials with coconut shell carbon support, a narrow band gap organic semiconductor-carbon composite photocatalyst was prepared, which solved the problems of poor recoveryability and narrow light absorption range of existing photocatalysts when treating antibiotics such as ciprofloxacin, and achieved the effect of efficiently degrading antibiotics under visible light.

CN119926489APending Publication Date: 2025-05-06GUANGXI UNIV
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Patent Information

Application Number
CN202510119523.6
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2025-01-24
Publication Date
2025-05-06

AI Technical Summary

Technical Problem

When treating antibiotics such as ciprofloxacin in medical wastewater, existing photocatalysts have problems such as poor recyclability, low reuse rate, narrow light absorption range and can only be driven by light in the ultraviolet region.

Method used

Using narrow band gap organic semiconductor-carbon composite materials, a photocatalyst that can be efficiently driven in visible light is prepared by combining organic photovoltaic materials with coconut carbon support. The method includes making the discarded coconut shell into a coconut shell charcoal support, mixing the organic photovoltaic material with chloroform and uniformly coating it on the coconut shell charcoal support, and drying it over heating to obtain a photocatalyst.

Benefits of technology

The long-term effective use of photocatalysts can be achieved, and antibiotics such as ciprofloxacin can be efficiently degraded under visible light, and has good stability and reusability.

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Abstract

The invention discloses a preparation method of a narrow-band-gap organic semiconductor carbon composite photocatalyst for degrading ciprofloxacin, which comprises the following operation steps: A, drying waste coconut shells to constant weight to obtain crude carbon; b, mechanically crushing the crude charcoal, calcining in a tubular furnace, heating from room temperature to 700 DEG C, and preserving heat for 1-2 hours to obtain coconut shell charcoal particles; c, crushing the coconut shell charcoal particles in a crusher, cleaning the crushed coconut shell charcoal particles in a 60-mesh screen, and drying the cleaned coconut shell charcoal particles to obtain a coconut shell charcoal carrier; d, mixing an organic photovoltaic material and chloroform according to the following weight ratio to prepare an organic semiconductor mixed solution: 0.003-0.006 g of the organic photovoltaic material and 10-20 mL of chloroform, wherein the organic photovoltaic material is PM6: Y6 or PM6: ITCPTC or PM6: Y6: ITCPTC; and E, uniformly coating a coconut shell charcoal carrier with the organic semiconductor mixed solution obtained in the step D, heating to 50-60 DEG C, and preserving heat for 18-24 hours to obtain the narrow-band-gap organic semiconductor carbon composite photocatalyst for degrading ciprofloxacin. The method provided by the invention has the advantages of simple process, low cost, greenness, stability and reusability, and the obtained catalyst has good photocatalytic performance and can effectively remove organic pollutants such as antibiotic ciprofloxacin and the like in medical wastewater.
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