Synthesis of Co and Cu codoped ZnO nanoparticles by citrate gel combustion method: Photocatalytic and antimicrobial activity

Publish Year: 1401
نوع سند: مقاله ژورنالی
زبان: English
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شناسه ملی سند علمی:

JR_JWENT-7-2_003

تاریخ نمایه سازی: 8 مرداد 1401

Abstract:

ZnO, single-doped (Co-ZnO, Cu-ZnO), and co-doped ZnO ((Co, Cu)/ZnO) were effectively synthesized by the citrate gel combustion technique. The samples were characterized by UV-visible diffuse reflectance spectroscopy (UV-vis-DRS), Fourier transforms infrared spectroscopy (FT-IR), X-ray powder diffraction (XRD), Scanning electron microscopy (SEM), energy-dispersive X-ray spectroscopy (EDX) and photoluminescence spectroscopy (PL). The average particle size was ۳۰.۳۳ nm as calculated from XRD patterns for (Co, Cu)/ZnO. UV-Vis absorption spectrum indicates that the co-doped ZnO exhibits increased visible light absorption compared to the undoped one.  The photoluminescence spectroscopy shows that the separation efficiency of photo-induced electrons and hole is enhanced by the co-doping strategy. (Co, Cu)/ZnO nanoparticles demonstrated a strong visible light response and high photocatalytic activity for Rhodamine B (RhB) degradation under irradiation by visible light (۴۰۰-۵۰۰ nm). The visible-light photocatalytic activity of the prepared  (Co, Cu)/ZnO may come about because of the incorporation of Co, Cu atoms in ZnO, photo-induced electron-hole pairs and extended the spectral response to the visible region. The antibacterial and antifungal activities of ZnO, Co-ZnO, Cu-ZnO, and (Co, Cu)/ZnO were studied respectively with Staphylococcus aureus (Gram-positive), Escherichia coli (Gram-negative) ( bacterial strain) and  Aspergillus flavus, Candida albicans (fungal strain). The (Co, Cu)/ZnO enhanced the antimicrobial activity.

Authors

Sheik Mohideen Badhusha M

Department of Chemistry, Sadakathullah Appa College, Tirunelveli, India

Kavitha Balasubramani

P.G. and Research Department of Chemistry, C.P.A. College, Bodinayakanur, India

Rajarajan M

Directorate of Distance Education, Madurai Kamaraj University, Madurai- ۶۲۵ ۰۲۱, India

Tharmaraj P

P.G. and Research Department of Chemistry, Thaiyaharajar College, Madurai, India

Suganthi Ayyadurai

P.G. and Research Department of Chemistry, Thaiyaharajar College, Madurai, India

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