Abstract
This study was planned to synthesize a multifunctional nanomaterial that can effectively encounter the organic pollutants, multidrug-resistant bacteria and reactive free radicals. The Bergenia ciliate (B. ciliate) leaves extract was used as a reducing and capping agent for the synthesis of nickel oxide nanoparticles (NiO NP). The physicochemical properties were studied through X-ray diffractometre (XRD), energy dispersive X-ray (EDX), scanning electron microscopy (SEM), transmission electron microscopy (TEM), UV-visible and Fourier transform infrared (FTIR) spectroscopies. The highly crystalline monoclinic NiO NPs were synthesized with crystallite size of 27.45 nm. The average particle size derived from TEM micrograph was 49.35 nm whereas the calculated band gap for NiO NPs was 3.78 eV. The photocatalytic study shows that 92.17% of the rhodamine 6G (Rh-6G) was efficiently degraded in the presence of NiO NPs. The agar well diffusion method was applied to examine the antibacterial activity of NiO NPs and the activity was found higher against Gram-negative bacteria (GNB) as compared to Gram-positive bacteria (GPB). The ABTS free radical scavenging activity was also performed, however, the activity was found less than the standard.
Highlights
The X-ray diffractogram of nickel oxide nanoparticles (NiO NP) shown in Figure 1 possesses the diffraction peaks at two theta positions, 37.20, 43.31, 63.86, 75.36 and 79.43, corresponding to miller indices of plane (001), (−111), (−311), (−221) and (−402)
An eco-friendly and efficient process was followed for the synthesis of highly crystalline nano-sized NiO NPs, which exhibit enhanced photocatalytic, antibacterial and an
An eco-friendly and efficient process was followed for the synthesis of highly crystalline nano-sized NiO NPs, which exhibit enhanced photocatalytic, antibacterial and antioxidant potential
Summary
Amongst all the sources of these contaminants, the most distinct are the azo dyes that are hazardous and non-biodegradable produced by the commercial manufacturers [1]. Damping of these dyes in the water and surroundings by the industries is lethal to human health and safety and is a cause of environmental contamination. These dyes are damaging the aquatic environment by affecting the watery plants and interrupting the photosynthesis in aquatic flora. Photocatalytic degradation has been suggested as an environment friendly and inexpensive method to eradicate the organic materials and pollutants from the waste water on manipulating the semiconductor metal oxides like TiO2 , ZnO, CuO and NiO [4]
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