A prominent dual heterojunction framed CuWO4/Bi2WO6/MnS ternary NCs for para-chlorophenol degradation, Cr(VI) reduction & toxicity studies

V Subhiksha; Mohammad K Okla; Ibrahim A Alaraidh; Asmaa Mohebaldin; Walid Soufan; Mostafa A Abdel-Maksoud; Ramadan F Abdelaziz; Ajith M Thomas; Lija L Raju; S Sudheer Khan

doi:10.1016/j.chemosphere.2022.134802

A prominent dual heterojunction framed CuWO₄/Bi₂WO₆/MnS ternary NCs for para-chlorophenol degradation, Cr(VI) reduction & toxicity studies

Chemosphere. 2022 Sep:302:134802. doi: 10.1016/j.chemosphere.2022.134802. Epub 2022 Apr 30.

Authors

Affiliations

¹ Nanobiotechnology Laboratory, Department of Biotechnology, Bannari Amman Institute of Technology, Sathyamangalam, Tamil Nadu, India.
² Botany and Microbiology Department, College of Science, King Saud University, P.O. Box 2455, Riyadh 11451, Saudi Arabia.
³ College of Medicine, Damascus University, Damascus, Syria.
⁴ Plant Production Department, College of Food and Agriculture Sciences, King Saud University, P.O. Box 2460, Riyadh 11451, Saudi Arabia.
⁵ Department of Pharmaceutical Sciences, Division of Pharmacology and Toxicology, University of Vienna, Austria.
⁶ Department of Botany and Biotechnology, St Xavier's College, Thumba, Thiruvananthapuram, India.
⁷ Department of Zoology, Mar Ivanios College, Nalanchira, Thiruvananthapuram, India.
⁸ Nanobiotechnology Laboratory, Department of Biotechnology, Bannari Amman Institute of Technology, Sathyamangalam, Tamil Nadu, India. Electronic address: sudheerkhan@bitsathy.ac.in.

PMID: 35504466
DOI: 10.1016/j.chemosphere.2022.134802

Abstract

In account of environmental remediation, an ideal photocatalyst was fabricated for the effective treatment of water systems. Herein, dual heterojunctions framed CuWO₄/Bi₂WO₆/MnS nanocomposite (NCs) was synthesized via simple co-precipitation method followed by ultra-sonicated assisted route. The prepared NCs were investigated its photocatalytic degradation performance using para-chlorophenol (4-CP) and reduction of chromium VI (Cr (VI)) under visible light irradiation. The photocatalyst were characterized by various analytical techniques including XRD, HR-TEM, XPS, UV-vis DRS, FE-SEM, EIS, PL, ESR, Raman and N₂ adsorption and desorption studies. The excellent photodegradation of 4-CP was observed within 180 min by the NCs. Similarly, the Cr (VI) reduction was about 97% within 140 min. The effect of pH and influence of different dosage of NCs and 4-CP on the photodegradation efficiency was investigated. The reusability and stability of the NCs was examined over 6 consecutive runs where the XRD and XPS confirm the structural stability of the prepared NCs. The scavenging experiment were carried out to elucidate the mechanism and the active species involved were O^2-• and OH• radicals. The TOC analysis affirmed the complete mineralization of the prepared NCs. The ecotoxicity analysis was carried out to determine the toxicity effect of intermediates using ECOSAR software and the end product toxicity was also evaluated against E. coli and S. epidermis. The end product toxicity study also confirmed that the degraded product was less toxic compared to parent compound. Further, the genotoxicity study was done to understand the environmental impact using allium cepa and results confirms that there are no causes of cytotoxicity & genotoxicity by the prepared NCs. Therefore, the prepared NCs can be economical, efficient with excellent photocatalytic performance and environment friendly.

Keywords: Dual heterojunction; Environmental remediation; Genotoxicity study; Ternary nanocomposite.

MeSH terms

Catalysis
Chlorophenols* / toxicity
Chromium
Environmental Restoration and Remediation*
Escherichia coli
Nanocomposites*
Water Pollutants, Chemical* / chemistry
Water Pollutants, Chemical* / toxicity

Substances

Chlorophenols
Water Pollutants, Chemical
Chromium
chromium hexavalent ion