Structural, optical and photocatalytic applications of biosynthesized NiO nanocrystals

Diallo, A.; Kaviyarasu, K.; Ndiaye, Saliou; Mothudi, B.M.; Ishaq, A.; Rajendran, V.; Mâaza, M.

doi:10.1080/17518253.2018.1447604

Cited by 84 publications

(24 citation statements)

References 60 publications

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“…Owing to the nonappearance of impurity peaks, the biofabricated nanoparticles were highly pure in nature. In addition, our obtained data are well-matched with JCPDS No: 98–009-0610, showing similar results to literature reports concerning biosynthesized NiO NPs 48 , 49 . Based on the high intensity of Bragg peak at 43.35°(200), the calculated median crystallite size of NiO NPs was 18 nm using Debye–Scherrer’s formula.…”

Section: Resultssupporting

confidence: 91%

Algal magnetic nickel oxide nanocatalyst in accelerated synthesis of pyridopyrimidine derivatives

Moavi

Buazar

Sayahi

2021

Sci Rep

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This research presents a novel biological route for the biosynthesis of nickel oxide nanoparticles (NiO NPs) using marine macroalgae extract as a reducing and coating agent under optimized synthesis conditions. XRD and TEM analyses revealed that phytosynthesized NiO NPs are crystalline in nature with a spherical shape having a mean particle size of 32.64 nm. TGA results indicated the presence of marine-derived organic constituents on the surface of NiO NPs. It is found that biogenic NiO NPs with BET surface area of 45.59 m2g−1 is a highly efficient catalyst for benign one-pot preparation of pyridopyrimidine derivatives using aqueous reaction conditions. This environmentally friendly procedure takes considerable advantages of shorter reaction times, excellent product yields (up to 96%), magnetically viable nanocatalyst (7 runs), low catalyst loadings, and free toxic chemical reagents.

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Section: Resultssupporting

confidence: 91%

Algal magnetic nickel oxide nanocatalyst in accelerated synthesis of pyridopyrimidine derivatives

Moavi

Buazar

Sayahi

2021

Sci Rep

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“…Owing to the nonappearance of impurity peaks, the biofabricated nanoparticles were highly pure in nature. In addition, our obtained data are well-matched with JCPDS No: 98-009-0610, showing similar results to literature reports concerning biosynthesized NiO NPs [31][32][33] . Based on the high intensity of Bragg peak at 43.15°(200), the calculated median crystallite size of NiO NPs was 8 nm using Debye-Scherrer's formula.…”

Section: Xrd Analysissupporting

confidence: 91%

Algal Magnetic Nickel Oxide Nanocatalyst in Accelerated Synthesis of Pyridopyrimidine Derivatives

Buazar

Moavi

Sayahi

2020

Preprint

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This research presents a novel biological route for the biosynthesis of nickel oxide nanoparticles (NiO NPs) using marine macroalgae extract as a reducing and coating agent under optimized synthesis conditions. XRD and TEM analyses revealed that phytosynthesized NiO NPs are crystalline in nature with a spherical shape having a mean particle size of 11±1 nm. It is found that biogenic NiO NPs is a highly efficient catalyst for benign one-pot preparation of pyridopyrimidine derivatives using aqueous reaction conditions. This environmentally friendly procedure takes considerable advantages of shorter reaction times, excellent product yields (up to 96%), magnetically reusable nanocatalyst (7 runs), low catalyst loadings, and free toxic chemical reagents.

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“…Likewise, there is a need to identify the mechanism of the green synthesis and related various physical and chemical reactions so to derive a likely universal model of green synthesis of nano-oxides [52][53][54][55][56][57][58][59][60]. Also, it is expected to demonstrate this procedure for the green synthesis of other functional simple monoxides [61], bioxides [62,63] and nanocomposites [64,65].…”

Section: Photoluminescence Propertiesmentioning

confidence: 99%

Green synthesis of single phase hausmannite Mn3O4 nanoparticles via Aspalathus linearis natural extract

et al. 2021

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Nowadays, green synthesis of nanoparticles using plant precursors has been extensively studied. However, less attention has been given to Mn3O4. This contribution validates the synthesis of single-phase Hausmannite Mn3O4 nanoparticles by a green approach without using any standard acid/base compounds, surfactants, and organic/inorganic dissolving agents. The chemical chelation of the Mn precursor was performed via bioactive compounds of the Aspalathus Linearis’ extract, an African indigenous plant. Annealing at 400 °C for ~ 1 h was required to crystallize the small amorphous nanoparticles with an initial bimodal size distribution peaking at $$\left\langle {\phi_{1} } \right\rangle$$ ϕ 1 ~ 4.21 nm and $$\left\langle {\phi_{2} } \right\rangle$$ ϕ 2 ~ 8.51 nm respectively. Such annealing lead to increase in the diameter of the nanoparticles from 17 to 28 nm.The morphological, structural, vibrational, surface, and photoluminescence properties of the single-phase Hausmannite nanoparticles were comprehensively investigated by High Resolution Transmission Electron Microscopy(HRTEM),Energy Dispersive X-ray Spectroscopy (EDS), X-ray Diffraction (XRD), Raman and X-rays Photoelectron Spectroscopy (XPS), spectroscopy as well as room temperature photoluminescence. Structural and morphological investigations revealed the formation of quasi-spherical nanoparticles having a single phase Hausmannite Mn3O4 crystal structure. XPS results also validated the XRD results about the formation of Hausmannite Mn3O4 nanoparticles. Raman investigations allowed a crystal-clear distinction between the Mn3O4 nature of the nanoparticles from the potential γ -Mn2O3 phase as both phases belong to the same space group and both assume tetragonally-distorted cubic lattices of nearly similar dimensions. The optical studies of the single phase Hausmannite crystalline nanoparticles exhibited a broad photoluminescence in the spectral range of 300–700 nm, which is ideal for emission devices. Graphic abstract

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Structural, optical and photocatalytic applications of biosynthesized NiO nanocrystals

Cited by 84 publications

References 60 publications

Algal magnetic nickel oxide nanocatalyst in accelerated synthesis of pyridopyrimidine derivatives

Algal magnetic nickel oxide nanocatalyst in accelerated synthesis of pyridopyrimidine derivatives

Algal Magnetic Nickel Oxide Nanocatalyst in Accelerated Synthesis of Pyridopyrimidine Derivatives

Green synthesis of single phase hausmannite Mn3O4 nanoparticles via Aspalathus linearis natural extract

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