METHOD FOR SYNTHESIZING A NITROGEN-DOPED CARBON QUANTUM DOTS (N-CQDS) MEDIATED Z-SCHEME HETEROJUNCTION

Abstract

ABSTRACT A method (100) for synthesizing a nitrogen-doped carbon quantum dots (N-CQDs) mediated Z-scheme heterojunction. Further, the method comprising providing a mixture of 4 grams of Nyctanthes flowers and 300 ml of distilled water, adding 10 ml of ethylenediamine (EDA), and heating the mixture at 90°C for 48 hours with continuous stirring. Further, the method (100) comprising the steps of subjecting the resultant solution to microwave irradiation at 100°C for 3-4 hours to obtain the N-CQDs. Further, the method (100) comprising the steps of fabricating a heterojunction by combining the N-CQDs with bismuth sulfide (Bi2S3) and cuprous oxide (Cu2O) nanoparticles in a 50 ml distilled water solution, followed by drying the mixture at 100°C for 3-4 hours. Further, the method (100) comprising the steps of utilizing the synthesized N-CQDs mediated Z-scheme heterojunction for photocatalytic degradation of ampicil

Specification

Description:FIELD OF THE DISCLOSURE
[0001] This invention generally relates to the field of photocatalytic materials and in particular relates to a method for synthesizing nitrogen-doped carbon quantum dots (N-CQDs) mediated Z-scheme heterojunctions designed for the efficient photocatalytic degradation of pharmaceutical pollutants in aqueous waste, utilizing environmentally friendly synthesis techniques and renewable resources.
BACKGROUND
[0002] The subject matter discussed in the background section should not be assumed to be prior art merely as a result of its mention in the background section. Similarly, a problem mentioned in the background section or associated with the subject matter of the background section should not be assumed to have been previously recognized in the prior art. The subject matter in the background section merely represents different approaches, which in and of themselves may also correspond to implementations of the claimed technology.
[0003] The increasing presence of pharmaceutical pollut , Claims:1. A method (100) for synthesizing a nitrogen-doped carbon quantum dots (N-CQDs) mediated Z-scheme heterojunction for photocatalytic degradation of pharmaceutical pollutants, the method comprising the steps of:
providing a mixture of 4 grams of Nyctanthes flowers and 300 ml of distilled water, adding 10 ml of ethylenediamine (EDA), and heating the mixture at 90°C for 48 hours with continuous stirring;
subjecting the resultant solution to microwave irradiation at 100°C for 3-4 hours to obtain the N-CQDs;
fabricating a heterojunction by combining the N-CQDs with bismuth sulfide (Bi2S3) and cuprous oxide (Cu2O) nanoparticles in a 50 ml distilled water solution, followed by drying the mixture at 100°C for 3-4 hours; and
utilizing the synthesized N-CQDs mediated Z-scheme heterojunction for photocatalytic degradation of ampicillin in aqueous waste under visible light irradiation.

2. The method (100) as claimed in claim 1, wherein the bismuth sulfide (Bi2S3) nanoparticles are synthesized using a sol-gel method by d

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