Multifunctional CuO nanoparticles with enhanced photocatalytic dye degradation and antibacterial activity

Abstract

Rhizome extract of Bergenia ciliata was used as a bio-functional reducing material for the green synthesis of copper oxide nanoparticles (CuO NPs). CuO NPs were characterized using ultraviolet–visible spectroscopy, Fourier transforms infrared spectroscopy, X-ray diffraction (XRD), dynamic light scattering, scanning electron microscopy (SEM) and energy-dispersive X-ray analysis (EDX). XRD analysis revealed the monoclinic phase of synthesized CuO NPs with an average particle size of 20 nm. Spherical shaped nanoscale CuO particles were observed by EDX and SEM confirming the Cu and O presence in the synthesized NPs. CuO NPs showed antibacterial effects against Bacillus subtilis, Staphylococcus aureus, Escherichia coli, Salmonella typhi. The antioxidant effect was measured and IC50 values for 2,2′-azino-bis (3-ethylbenzothiazoline-6-sulfonic acid (ABTS), 2,2-diphenyl-1-picrylhydrazyl and Ferric reducing antioxidant power assays were found to be 91.2, 72.4 and 109 μg mL− 1 respectively. Under sunlight, the CuO NPs reported extraordinary photocatalytic activity against Methylene Blue and Methyl Red degradation with efficiencies of 92–85%. CuO NPs have excellent potential application for the photocatalytic degradation of organic pollutants and in the development of antibacterial materials. This study offers new insights in the field of inexpensive and green synthesis-based antimicrobial effective CuO photocatalysts from B. ciliata to remove harmful dyes from industrial-based waters with high degradation efficiency, which is environmentally friendly.

Superhydrophobic and superoleophilic polyethylene aerogel coated natural rubber latex foam for oil-water separation application

“…Dentro de los materiales antibacterianos más estudiados, se encuentran los óxidos metálicos, entre ellos están el óxido de titanio (TiO2) (Abu-Dalo et al, 2019;Khashan et al, 2021), óxido de magnesio (MgO) (Jeevanandam et al, 2019;Nejati et al, 2022), óxido de cobre (CuO) (Badetti et al, 2019;Dulta et al, 2022)y ZnO (Kim et al, 2022;Lallo da Silva et al, 2019), siendo este último uno de los materiales más prometedores. El óxido de zinc (ZnO) es un semiconductor que se ha utilizado como material antibacteriano por su gran estabilidad química y térmica (Jones et al, 2013;Koodziejczak-Radzimska et al, 2012).…”

Effect of the green synthesis of CuO plate-like nanoparticles on their photodegradation and antibacterial activities

“…This spectrum showed absorption peaks at 250 nm and 298 nm, attributed to the surface plasmon resonance (SPR) absorbance of metal oxide nanoparticles and energy band contributions respectively, confirming the formation of CuO NPs. 43,44 This SPR band depended on size, shape, and nature of the particles. 45 The change of colour from light green to dark also verified the surface plasmon-induced absorption.…”

“…Dynamic light scattering (DLS) analysis was also performed to obtain the particle-size distribution. 51 In this DLS technique, the intensity of light scattered by the CuO particles dispersed in a solution was recorded at a very high temporal resolution, and using this data, the average particle diameter was calculated, as shown in Fig. S4 (ESI †) with a particle size (diameter) around 110.9 nm.…”

Effective removal of arsenic (V) from aqueous solutions using efficient CuO/TiO2 nanocomposite adsorbent

“…The SEM micrograph of TiO2 shows that the nanoparticles are monodisperse and have a spherical geometry [36]. The SEM analysis of CuO presented in Figure 3b shows some agglomeration of particles due to a large surface area [37]. The homogeneous distribution of CuO over TiO2 was observed in the SEM image of the nanocomposite, as illustrated in Figure 3c.…”