Sunlit photocatalytic degradation of organic pollutant by NiCr2O4/Bi2S3/Cr2S3 tracheid skeleton nanocomposite: Mechanism, pathway, reactive sites, genotoxicity and byproduct toxicity evaluation

• Published in: Journal of environmental management 2022-10, Vol.319, p.115674-115674, Article 115674
• Main Authors: Balasurya, S., Okla, Mohammad K., Alaraidh, Ibrahim A., Al-ghamdi, Abdullah A., Mohebaldin, Asmaa, Abdel-Maksoud, Mostafa A., Abdelaziz, Ramadan F., Thomas, Ajith M., Raju, Lija L., Khan, S. Sudheer
• Format: Article
• Language: English
• Subjects: Methyl orange and Congo red; NiCr2O4–B2S3–Cr2S3 NCs; Photodegradation
• ISSN: 0301-4797; 1095-8630
• DOI: 10.1016/j.jenvman.2022.115674

In this study, 3D C2S3 (CS) and 2D Bi2S3 (BS) modified NiCr2O4 nanocomposite (NCO-BS-CS NCs) was prepared by sonochemical assisted co-precipitation method for the enhanced photocatalytic activity. Here, NCO-BS-CS NCs showed band gap energy of 2.23 eV and the PL intensity of NCO-BS-CS NCs was lower than NCO, BS, and CS NPs. Thus, the results indicate the fabricated NCO-BS-CS NCs enhance the charge segregation and lower in recombination rate. NCO-BS-CS NCs showed enhanced photodegradation of methyl orange (MO) (95%) and congo red (CR) (99.7%) respectively. The total organic compound (TOC) analysis shows the complete mineralization of about 91 and 98% for MO and CR respectively. Furthermore, the Fukui function was used for the prediction of reactive sites in the photodegradation pathway of MO and CR by NCs. ECOSAR program was done to determine the toxicity of the intermediate and the results conclude that the degraded product shows nontoxic to the environmental organism (fish, daphnia, and algae). Thus, the fabricated NCO-BS-CS NCs can be used for the remediation of toxic organic pollutants from the waste water by photocatalytic degradation. •NCO-BS-CS NCs was synthesized by sono-chemical coprecipitation method.•The NCO-BS-CS NCs showed outstanding visible-light photocatalytic activity.•NCO-BS-CS NCs demonstrates good photostability and reusability.•The hydroxyl and super oxide radical were responsible for the enhance photocatalytic activity.