Abstract
Objectives: To study the eco-friendly green synthesis of neodymium doped nickel oxide nanoparticles and to study their structural, optical and antibacterial activities. Method: Sesbania grandiflora herb has been used to synthesize NiO nanoparticles. With the materials present in the plant extract, such as sugar, flavonoid, protein, enzyme, polymer, and organic acid, acting as the reducing agent the green approach takes charge in bio induction of metal ions into nanoparticles. Structural and Optical Properties of nanoparticles were studied by following XRD, SEM, EDAX, FTIR and UV-Vis-NIR (DRS). The antibacterial activity of the resultant neodymium (Nd3+) doped nickel oxide (NiO) was tested on Gram negative and Gram positive bacteria with suitable standard. Findings: From the XRD analysis, it is revealed that the size of the particles is in the order of 9.2 to 23.06 nm. JCPDS data confirmed that Nd3+ ion-doped NiO nanoparticles exhibit phases of (111), (200), (220), and (311). SEM with EDAX proved that existence of Nd3+ ion-doped NiO nanoparticles. Cubical and spherical shapes of the nanoclusters having a size of 20-40 nm are shown by SEM analysis. Most promising peaks at 420 cm-1 and 657 cm-1 associated to Ni-O vibration bond and Ni-O-H stretching bond were analyzed from FTIR graph of the sample before annealing while for the sample at 500oC shows the Ni-O vibration bond at 411cm-1. The direct band gap of Nd3+ ion-doped NiO nanoparticles calculated as 3.08 eV at the concentration of NiONdO3 mol%. By doping with Nd3+ ion, energy gap increases with doping concentration proved by UVDRS spectroscopy that confirms Quantum confinement. The eco-friendly synthesized nanoparticles exhibited good antibacterial activity against pathogenic bacterial strain is an indication of antibacterial efficiency of nanoparticles. Novelty: Eco-friendly synthesis of NiO nanoparticles and characterization and doped nanoparticles exhibited good antibacterial activity. Keywords: Green synthesis; NiO particles; Characterization; Cubical; spherical shapes; Direct band gap semiconductors; NIR laser; Antibacterial activities
Highlights
Semiconductor nanoparticles such that ZnO or nickel oxide (NiO) nanoparticles are awesome material tool for present research world because of their applications can be found in the field of catalysts, gas sensors, electrochromic film, fuel cell, magnetic materials, anode of organic light emitting diodes and thermoelectric materials [1,2]
It is evaluated for cytotoxic activity towards A549 cell culture, antibacterial activity and photo catalytic degradation (PCD) of 4 chlorophenol (4 CP), which is known as the endocrine disrupting chemical (EDC)
The X-ray diffraction (XRD) spectral analysis of Nd3+ ion doped with NiO nanoparticles was identified the sharp peaks in the crystalline nature, as shown in Figure 1 form this XRD analysis studied the structure and size of the NiO nanoparticles
Summary
Semiconductor nanoparticles such that ZnO or NiO nanoparticles are awesome material tool for present research world because of their applications can be found in the field of catalysts, gas sensors, electrochromic film, fuel cell, magnetic materials, anode of organic light emitting diodes and thermoelectric materials [1,2]. Metal oxide solar cells serve a good replacement for conventional silicon solar cells because of metal oxides are low-cost materials, wide range of optical applications. Fossil fuels are being replaced by renewable energies, a field that increasingly uses rare earth elements. These elements are used in electric cars and wind turbines. NiO nanoparticles exhibits super paramagnetic behavior, when magnetization studies are approved. It is evaluated for cytotoxic activity towards A549 cell culture, antibacterial activity and photo catalytic degradation (PCD) of 4 chlorophenol (4 CP), which is known as the endocrine disrupting chemical (EDC)
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