scholarly journals Phytochemical-Assisted Green Synthesis of Nickel Oxide Nanoparticles for Application as Electrocatalysts in Oxygen Evolution Reaction

Catalysts ◽  
2021 ◽  
Vol 11 (12) ◽  
pp. 1523
Author(s):  
Vidhya Selvanathan ◽  
M. Shahinuzzaman ◽  
Shankary Selvanathan ◽  
Dilip Kumar Sarkar ◽  
Norah Algethami ◽  
...  
Keyword(s):  
Particle Size ◽  
Nickel Oxide ◽  
Green Synthesis ◽  
Surface Area ◽  
Water Splitting ◽  
Aloe Vera ◽  
Oxide Nanoparticles ◽  
Average Particle ◽  
Nickel Oxide Nanoparticles ◽  
Peel Extract

Electrocatalytic water splitting is a promising solution to resolve the global energy crisis. Tuning the morphology and particle size is a crucial aspect in designing a highly efficient nanomaterials-based electrocatalyst for water splitting. Herein, green synthesis of nickel oxide nanoparticles using phytochemicals from three different sources was employed to synthesize nickel oxide nanoparticles (NiOx NPs). Nickel (II) acetate tetrahydrate was reacted in presence of aloe vera leaves extract, papaya peel extract and dragon fruit peel extract, respectively, and the physicochemical properties of the biosynthesized NPs were compared to sodium hydroxide (NaOH)-mediated NiOx. Based on the average particle size calculation from Scherrer’s equation, using X-ray diffractograms and field-emission scanning electron microscope analysis revealed that all three biosynthesized NiOx NPs have smaller particle size than that synthesized using the base. Aloe-vera-mediated NiOx NPs exhibited the best electrocatalytic performance with an overpotential of 413 mV at 10 mA cm−2 and a Tafel slope of 95 mV dec−1. Electrochemical surface area (ECSA) measurement and electrochemical impedance spectroscopic analysis verified that the high surface area, efficient charge-transfer kinetics and higher conductivity of aloe-vera-mediated NiOx NPs contribute to its low overpotential values.

Spectroscopic, Structural, and Morphology of Nickel Oxide Nanoparticles Prepared Using Physalis angulata Leaf Extract

2018 ◽  
Vol 917 ◽  
pp. 167-171 ◽  
Author(s):  
Najmawati Sulaiman ◽  
Yoki Yulizar
Keyword(s):  
Electron Microscopy ◽  
Particle Size ◽  
Nickel Oxide ◽  
Band Gap ◽  
Leaf Extract ◽  
Optical Band Gap ◽  
Oxide Nanoparticles ◽  
Nickel Oxide Nanoparticles ◽  
Microscopic Studies ◽  
Nio Nps

Green synthesis of nickel oxide nanoparticles (NiO NPs) usingPhysalisangulataleaf extract (PALE) as weak base sources and stabilizing agents has been reported. Chemical bonding and vibration spectroscopy, crystallographic structure, optical band gap, particle size and microscopic studies of NiO NPs were also investigated. Ni-O vibration modes of NiO NPs were analyzed by FTIR and Raman instrument at ~400 and ~900 cm-1wavenumber. XRD pattern of NiO NPs confirmed cubic crystal structure with space groupFm-3m.Optical band gap of NiO NPs determined by using Tauc plot method was about 3.42 eV. Particle size analyzer showed size distribution of NiO NPs was 64.13 nm which confirm NiO formed in nanoscale. Electron microscopic studies of NiO NPs were observed by using scanning electron microscopy and transmission electron microscopy.

scholarly journals Recent Advances in the Synthesis and Stabilization of Nickel and Nickel Oxide Nanoparticles: A Green Adeptness

2016 ◽  
Vol 2016 ◽  
pp. 1-14 ◽  
Author(s):  
Muhammad Imran Din ◽  
Aneela Rani
Keyword(s):  
Nickel Oxide ◽  
Green Synthesis ◽  
Biological Effects ◽  
Cost Effective ◽  
Synthetic Methods ◽  
Biological Behavior ◽  
Oxide Nanoparticles ◽  
Nickel Oxide Nanoparticles ◽  
Synthesis Of Nanoparticles ◽  
Synthesis Properties

Green protocols for the synthesis of nanoparticles have been attracting a lot of attention because they are eco-friendly, rapid, and cost-effective. Nickel and nickel oxide nanoparticles have been synthesized by green routes and characterized for impact of green chemistry on the properties and biological effects of nanoparticles in the last five years. Green synthesis, properties, and applications of nickel and nickel oxide nanoparticles have been reported in the literature. This review summarizes the synthesis of nickel and nickel oxide nanoparticles using different biological systems. This review also provides comparative overview of influence of chemical synthesis and green synthesis on structural properties of nickel and nickel oxide nanoparticles and their biological behavior. It concludes that green methods for synthesis of nickel and nickel oxide nanoparticles are better than chemical synthetic methods.

Ultrasmall Dispersible Crystalline Nickel Oxide Nanoparticles as High-Performance Catalysts for Electrochemical Water Splitting

2014 ◽  
Vol 24 (21) ◽  
pp. 3123-3129 ◽  
Author(s):  
Ksenia Fominykh ◽  
Johann M. Feckl ◽  
Johannes Sicklinger ◽  
Markus Döblinger ◽  
Sebastian Böcklein ◽  
...  
Keyword(s):  
Nickel Oxide ◽  
Water Splitting ◽  
High Performance ◽  
Oxide Nanoparticles ◽  
Nickel Oxide Nanoparticles ◽  
Electrochemical Water Splitting

scholarly journals A Novel Green Synthesis of Nickel Oxide Nanoparticles Using Arabic Gum

2017 ◽  
Vol 12 (1) ◽  
pp. 115-118 ◽  
Author(s):  
Saeid Taghavi Fardood ◽  
Ali Ramazani ◽  
Sajjad Moradi
Keyword(s):  
Nickel Oxide ◽  
Green Synthesis ◽  
Oxide Nanoparticles ◽  
Nickel Oxide Nanoparticles ◽  
Arabic Gum

Thermal Conductivity of Nickel Oxide Nanoparticles Synthesized by Combustion Method

2010 ◽  
Vol 1256 ◽  
Author(s):  
Pranati Sahoo ◽  
Dinesh Misra ◽  
Girija Shankar Chaubey ◽  
James Salvador ◽  
Nathan J. Takas ◽  
...  
Keyword(s):  
Thermal Conductivity ◽  
Nickel Oxide ◽  
Surface Area ◽  
Reaction Temperature ◽  
Synthesis Method ◽  
Solution Combustion Synthesis ◽  
Bet Surface Area ◽  
Oxide Nanoparticles ◽  
Solution Combustion ◽  
Nickel Oxide Nanoparticles

AbstractMonodispersed nickel oxide nanoparticles have been synthesized using solution combustion synthesis method. Size of the nanoparticles was controlled by varying different reaction parameters such as reaction temperature and reaction time. Structure and morphology of the nanoparticles were investigated using X-ray diffraction and transmission electron microscopy. BET surface area of 99.7 m2/g was obtained for the nanoparticles synthesized at 300 °C. A decrease in surface area was observed with increase in reaction temperature. The nanoparticles were compacted using spark plasma sintering technique at 950 °C and thermal conductivity was studied on compacted sample. Significant decrease in thermal conductivity was observed for nanoparticles in compared to their bulk counter-part.

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