Visible light active CdS/CuO nanocomposites for photocatalytic degradation of ciprofloxacin, H2 production and antimicrobial activity
Document Type
Article
Publication Date
3-1-2025
Abstract
In this study, cadmium sulfide/copper oxide (CdS/CuO) nanocomposite was synthesized by hydrothermal approach and used as a photocatalyst for ciprofloxacin (CIP) degradation, H2 production and antibacterial activity. The as-prepared nanocomposite was characterized with state-of-the-art analytical techniques. The BET surface area and bandgap energy of CdS/CuO nanocomposite were calculated to be 6.1 m2/g and 1.66 eV, respectively. The CIP degradation under visible light illumination by CdS/CuO nanocomposite was achieved to be 100 % under the experimental conditions of CIP]0 = 10 mg/L, pH = 5.0, dosage of CdS/CuO = 0.5 g/L and time = 180 min. Interestingly, H2 production rate of 358.8 mu mol/h g- 1 was obtained by CdS/CuO under visible light illumination. Moreover, the CdS/CuO nanocomposite showed promising activity against E. coli. Based on the investigation of degradation intermediates as well as the ecotoxicity study, mainly four degradation products (DPs) formed via piperazine oxidation as well as ring opening reaction. Even though the parent compound did not show the ecotoxicity, the produced DP4 demonstrated much higher acute and chronic toxicity with LC50, EC50 and ChV. The present work suggests that developing a heterojunction of semiconductors is a viable strategy for enhancing their photocatalytic activities to purify water and generate green energy. Also, it suggests that toxicity study is an essential part to develop reliable treatment technologies for decomposing micropollutants in water.
Keywords
CdS/CuO nanocomposite, Ciprofloxacin, Photocatalytic Degradation, H 2 production, Antibacterial activity, Wastewater treatment
Divisions
mechanical
Funders
Higher Education Commission (HEC) , Pakistan through National Research Program for Universities (NRPU) Project (20-15851/NRPU/RD/HEC/2021-2020),Deanship of Research and Graduate Studies at King Khalid University (RGP2/235/46),National Research Foundation of Korea Ministry of Science & ICT (MSIT), Republic of Korea (RS-2025-00461931),Fulbright Visiting Scholar Award from the Korean-American Educational Commission - U.S. Government,Fulbright Visiting Scholar Award from the Korean-American Educational Commission - Korean Government
Publication Title
Chemical Engineering Journal
Volume
507
Publisher
Elsevier
Publisher Location
PO BOX 564, 1001 LAUSANNE, SWITZERLAND