scholarly journals Preparation, Characterization, and Application of Nickel Oxide Nanoparticles in Glucose and Lactose Biosensors

2019 ◽  
Vol 13 (6) ◽  
pp. 99 ◽  
Author(s):  
A. M. Abdallah ◽  
H. Basma ◽  
R. Awad
Keyword(s):  
Nickel Oxide ◽  
Lattice Structure ◽  
Magnetic Hysteresis ◽  
Precipitation Method ◽  
Ferromagnetic Behavior ◽  
Face Centered Cubic ◽  
Sonication Time ◽  
Nio Nanoparticles ◽  
Nickel Oxide Nanoparticles ◽  
Vis Spectroscopy

Nickel oxide (NiO) nanoparticles were synthesized using the co-precipitation method. The structural, morphological, optical and magnetic properties of NiO nanoparticles were investigated by X-ray Powder Diffraction (XRD), Transmission Electron Microscopy (TEM), Fourier Transform Infrared Spectroscopy (FTIR), UV-vis Spectroscopy and Vibrating Sample Magnetometer (VSM). The influence of sonication time on the physical characteristics of NiO nanoparticles was illustrated. The interactions of NiO nanoparticles with both glucose and lactose have been0 studied using UV-vis Absorption Spectroscopy and Fluorescence Spectroscopy. XRD pattern reveals that NiO nanoparticles exhibit a face-centered-cubic lattice structure with a crystallite size of 22.77 nm. The magnetic hysteresis demonstrates the ferromagnetic behavior of NiO nanoparticles at room temperature. The energy band gap increases, from 2.8 eV to 3.1 eV, with increasing sonication time from 5 to 20 minutes. It is found that the interaction of lactose-NiO nanoparticles is stronger than that of glucose-NiO ones. The obtained results can be investigated in future biomedical applications, especially in non-enzymatic biosensors.

Exploring the characteristics of the nickel oxide nanoparticles via Sol - gel method

2020 ◽  
Vol 3 (3) ◽  
Author(s):  
Jothi M ◽  
Sowmiya K
Keyword(s):  
Nickel Oxide ◽  
Ph Value ◽  
Lattice Structure ◽  
Sol Gel ◽  
Systematic Change ◽  
Average Crystalline Size ◽  
Nio Nanoparticles ◽  
Nickel Oxide Nanoparticles ◽  
X Ray ◽  
Vis Spectroscopy

Nickel Oxide (NiO) is an important transition metal oxide with cubic lattice structure. NiO is thermally stable that is suitable for tremendous applications in the field of optic, ceramic,glass, electro-chromic coatings, plastics, textiles, nanowires, nanofibers, electronics,energy technology, bio-medicine, magnetism and so on. In this present study, NiO nanoparticles were successfully synthesized by sol-gel technique. Nano-sols were prepared by dissolving Nickel-Chloride [NiCl2.6H2O] in NaOH solvent and were converted into nano structured gel on precipitation. A systematic change in preparation parameters like calcination temperature, time, pH value has been noticed in order to predict the influence on crystallite size. Then the prepared samples were characterized by the X-ray Diffraction Spectroscopic (XRD), UV-VIS Spectroscopy, Fourier Transform Infra-Red Spectroscopy (FTIR), Energy Dispersive X-ray Spectroscopy (EDX), Scanning Electron Microscopy (SEM) and Particle Size Analyzer (PSA). From XRD, the average crystalline-size has been calculated by Debye-Scherrer Equation and it was found to be 12.17 nm and the band gap energy of Nickel oxide (NiO) from UV studies reveals around 3.85 eV. Further, EDX and FTIR studies, confirm the presences of NiO nanoparticles. The SEM study exhibits the spherical like morphology of Nickel oxide (NiO). Further from PSA, the mean value of NiO nanoparticles has been determined.

Structural, Thermal and Optical Properties of Nickel Oxide (NiO) Nanoparticles Synthesized by Chemical Precipitation Method

2016 ◽  
Vol 1141 ◽  
pp. 65-71 ◽  
Author(s):  
M.P. Deshpande ◽  
Kiran N. Patel ◽  
Vivek P. Gujarati ◽  
Kamakshi Patel ◽  
S.H. Chaki
Keyword(s):  
Optical Properties ◽  
Chemical Precipitation ◽  
Precipitation Method ◽  
Nitrate Hexahydrate ◽  
Face Centered Cubic ◽  
X Rays ◽  
Nio Nanoparticles ◽  
Violet Emission ◽  
Xrd Pattern ◽  
Vis Spectroscopy

Nanocrystalline NiO has been prepared successfully by chemical precipitation route using nickel nitrate hexahydrate (Ni (NO3)2·6H2O) and sodium hydroxide (NaOH) aqueous solution at a temperature of 60 ̊C. Their compositional, structural, morphological, thermal and optical properties were studied using energy dispersive analysis of X-rays (EDAX), X-ray diffraction (XRD), transmission electron microscopy (TEM), thermogravimetric analysis (TGA), ultraviolet-visible (UV-Vis) spectroscopy, photoluminescence (PL) spectroscopy and Raman spectroscopy. From XRD pattern we confirmed the face centered cubic (fcc) structure of the synthesized NiO nanoparticles. The selected area electron diffraction (SAED) pattern indicated the same crystalline planes as seen in XRD pattern. TGA indicates good thermal stability of synthesized NiO nanoparticles and the optical absorption spectrum of NiO nanoparticles shows the strong absorption edge at 235nm (4.10eV). PL spectra of NiO nanoparticles shows two wide emission peaks at 420nm (2.95eV) and 440nm (2.82eV) and a strong–broad peak at 460nm (2.70eV) in violet emission band whereas the Raman peak observed at 518cm-1 shows the Ni-O stretching mode of vibration.

scholarly journals MICROWAVE ASSISTED SYNTHESIS AND STRUCTURAL CHARACTERIZATION OF NICKEL OXIDE NANOPARTICLES

2016 ◽  
Vol 3 (1) ◽  
pp. 12-14
Author(s):  
Kalpanadevi K ◽  
Manimekalai R
Keyword(s):  
Electron Microscope ◽  
Nickel Oxide ◽  
Structural Characterization ◽  
Nano Particles ◽  
Microwave Assisted Synthesis ◽  
Nio Nanoparticles ◽  
Nickel Oxide Nanoparticles ◽  
Transmission Electron ◽  
Good Crystallinity

Nickel oxide (NiO) nano-particles were produced via a simple microwave method from the Ni(OH)2 precursor, which was obtained by slow drop-wise addition of 0.1M sodium hydroxide to 0.1M nickel nitrate. The mixture was vigorously stirred until the pH reached 7.2. The mixture was then irradiated with microwave to deposit Ni(OH)2 at a better precipitation rate. Drying the precipitate at 320°C resulted in formation of NiO nanoparticles. High Resolution Transmission Electron Microscope (HRTEM), Scanning Electron Microscope (SEM) and X-ray diffraction (XRD), employed for the structural characterization of the as-prepared NiO nanoparticles, revealed their good crystallinity and high-purity. Microwave irradiation increased homogeneity and decreased the mean particle size of the produced NiO particles.

scholarly journals Impact of Reducing Agent on the Synthesis of Nickel Oxide Nanoparticles by Chemical Precipitation Method

2021 ◽  
Vol 10 (1) ◽  
pp. 14-18
Author(s):  
V.Kayathri V.Kayathri ◽  
K.Kousalya K.Kousalya ◽  
A.Mafeena A.Mafeena ◽  
M.Monisha M.Monisha ◽  
S.Naga Nandhini S.Naga Nandhini ◽  
...  
Keyword(s):  
Nickel Oxide ◽  
Chemical Precipitation ◽  
Reducing Agent ◽  
Chemical Precipitation Method ◽  
Precipitation Method ◽  
Oxide Nanoparticles ◽  
Nickel Oxide Nanoparticles

Structural and Optical Properties of Pure NiO Nanoparticles and NiO-Mn2O3, NiO-CdO, NiO-Pb2O3, NiO-ZnO Nanocomposites

2021 ◽  
Vol 14 (5) ◽  
pp. 409-417
Keyword(s):  
Nickel Oxide ◽  
Green Emission ◽  
Hexagonal Structure ◽  
Precipitation Method ◽  
Nio Nanoparticles ◽  
Structural And Optical Properties ◽  
Suitable Material ◽  
Structure Morphology ◽  
Average Grain Size ◽  
Co Precipitation

Abstract: Pure nickel oxide (NiO) nanoparticles and NiO-Mn2O3, NiO-CdO, NiO-Pb2O3, NiO –ZnO nanocomposites were synthesized by co-precipitation method. The PXRD studies revealed that NiO, Mn2O3 and CdO possessed cubic structure, Pb2O3 possessed monoclinic structure, ZnO possessed hexagonal structure and confirmed the presence of polycrystallinity nature of NiO and Mn2O3, CdO, Pb2O3, ZnO in the nanocomposites. The average grain size of NiO nanoparticles was found to be 30.10 nm using Debye Scherer’s formula. The FESEM images of NiO nanoparticles and their nanocomposites revealed spherical shaped structure and NiO-Pb2O3 revealed needle shaped rod-like structure. EDAX analysis confirmed the composition of NiO nanoparticles and their nanocomposites. Raman spectra exhibited characteristic peaks of pure NiO and that of NiO- Mn2O3, NiO-CdO, NiO- Pb2O3, NiO-ZnO in the synthesized nanocomposites. In the PL spectra, blue and green emission was observed in the samples. UV-vis spectra revealed the absorption peaks of NiO nanoparticles and their nanocomposites. Thus, the synthesized NiO- Mn2O3, NiO-CdO, NiO - Pb2O3 and NiO-ZnO nanocomposites can be a suitable material for electrocatalysis applications. Keywords: Nickel oxide nanocomposites, Structure, Morphology, Absorption, Luminescence.

Mixed Magnetic Behavior in Gadolinium and Ruthenium Co-doped Nickel Oxide Nanoparticles

2021 ◽  
Author(s):  
Alaa Abdallah ◽  
Ramadan Awad
Keyword(s):  
Data Storage ◽  
Energy Gap ◽  
Magnetic Behavior ◽  
Precipitation Method ◽  
Homogeneous Distribution ◽  
Magnetic Polaron ◽  
Face Centered Cubic ◽  
Nio Nanoparticles ◽  
X Ray ◽  
Co Doped

Abstract Pure and different concentrations from (Gd, Ru) co-doped NiO nanoparticles, capped with Polyvinylpyrrolidone (PVP), were fabricated by the co-precipitation method. The nanoparticles were characterized by different techniques. The Rietveld refinements of X-Ray Diffraction (XRD) patterns confirmed the formation of the pure face-centered-cubic NiO phase. The X-ray Photo-induced Spectroscopy (XPS) assured the trivalent oxidation state of the doped ions Gd3+ and Ru3+ and unveiled the multiple oxidation states of nickel ions (Ni2+ and Ni3+), emerging from the vacancies in the samples. The Transmission Electron Microscope (TEM) images showed the pseudospherical morphology of the samples and the Energy Dispersive X-ray permitted the quantitative analysis of the presented elements and their homogeneous distribution. The Raman and Fourier Transform Infra-Red (FTIR) spectra depicted the fundamental vibrational bands of NiO nanoparticles, confirming their purity. The UV-visible spectroscopy enabled the absorption measurements and the energy gap calculations. The co-dopants increased the energy bandgap of NiO nanoparticles from 3.15 eV for pure NiO to 3.62 eV with the highest concentration of the co-dopants (x = 0.02) The photoluminescence (PL) spectra gave insights into the possible defects present in the samples, such as nickel vacancies, single and double oxygen vacancies, and oxygen interstitials. The Vibrating Sample Magnetometer (VSM) studied the room temperature M-H loops of the co-doped samples. A combination of ferromagnetic, antiferromagnetic, and paramagnetic contributions was noticed and treated according to the law of approach to saturation and bound magnetic polaron (BMP) model. The magnetic parameters, such as the saturation magnetization, exchange and anisotropy field, and the BMP concentration were extracted from the fitted models and discussed in terms of the co-dopants’ concentration. The co-doped samples showed a softer magnetic behavior, which is recommended for data storage applications.

NiO nanoparticles prepared by the sol-gel method for a dye sensitized solar cell applications

2018 ◽  
Vol 1 (92) ◽  
pp. 15-21
Author(s):  
M. Szindler ◽  
M.M Szindler ◽  
L.A. Dobrzański ◽  
T. Jung
Keyword(s):  
Solar Cell ◽  
Nickel Oxide ◽  
Sol Gel ◽  
Dye Sensitized Solar Cell ◽  
Nio Nanoparticles ◽  
Nickel Oxide Nanoparticles ◽  
Gel Method ◽  
Sol Gel Method ◽  
Dye Sensitized ◽  
Harvesting Efficiency

Purpose: The purpose of this article is to synthesized NiO nanostructures by sol-gel method and characterized them for use in dye sensitized solar cells. For this purpose, a paste prepared from nanoparticles was prepared and screen printed on a glass substrate with the FTO layer. Design/methodology/approach: Nickel oxide nanoparticles was synthesized with participation of nickel (II) nitrate hexahydrate and citric acid. The prepared nanopowder has been subjected to structural analysis using a transmission electron microscope (TEM). Scanning Electron Microscopic (SEM) images were taken with a Zeiss Supra 35. Qualitative studies of chemical composition were also performed using the Energy Dispersive Spectrometer (EDS). The structure of nickel oxide was investigated by X-ray crystallography. An average crystallite size were calculated using Scherrer method and Williamson-Hall analysis. Light harvesting efficiency LHE was calculated from measured absorbance. Findings: The uniform nickel oxide nanoparticles with spherical shape were successfully produced by sol-gel method. The diameter of the as prepared nanoparticles does not exceed 25 nm which is confirmed by the XRD and TEM analysis. The light harvesting efficiency of the electrode in the entire studied range it’s over 90%. Therefore the NiO can be an attractive alternative to the most commonly used TiO2. Research limitations/implications: The next step in the research will be to investigate the ZnO/NiO composite on the properties of the photoelectrode of dye sensitized solar cell. Practical implications: The unique properties of produced NiO nanostructural materials have caused their interest in such fields as medicine, transparent electronics and photovoltaics. Originality/value: The NiO nanoparticles were prepared using sol-gel method and then effectively used in the photoanode of dye sensitized solar cell.

Effect of M-Type Hexaferrites on Mechanical and Magnetic Properties of Hydroxyapatite Ceramics

2017 ◽  
Vol 751 ◽  
pp. 611-616
Author(s):  
Rewadee Wongmaneerung
Keyword(s):  
Magnetic Properties ◽  
Magnetic Hysteresis ◽  
Hysteresis Loops ◽  
Barium Hexaferrite ◽  
Precipitation Method ◽  
Strontium Hexaferrite ◽  
Ferromagnetic Behavior ◽  
Hydroxyapatite Ceramics ◽  
Xrd Patterns ◽  
Co Precipitation

The overall aim of this study is to establish the inter-relationships between phase formations, mechanical properties and magnetic properties of the novel ceramic in hydroxyapatite system for biomaterial applications. First, barium hexaferrite and strontium hexaferrite powders were prepared as M-type hexaferrite phases. Hydroxyapatite was prepared from cockle shells via co-precipitation method. After that, a combination between hydroxyapatite+barium hexaferrite and hydroxyapatite+strontium hexaferrite was mixed together then shaping and sintering at 1200 °C for 2 h. The sintered samples were characterized phase formation, mechanical and magnetic properties by using X-ray diffraction (XRD), Universal testing and VSM measurements, respectively. XRD patterns for all samples showed a combination between hydroxyapatite and hexaferrite phases. Compressive strength of all samples tends to increase with increasing of the amount of hexaferrite phases due to densification mechanism. However, the increasing of these values, it appears that there is no difference in the statistical significant. For magnetic properties, the coexistence of barium hexaferrite and strontium hexaferrite phases reveals magnetic hysteresis loops, showing the change from diamagnetic to ferromagnetic behavior.

Au doping effect on the electrical and magnetic properties of Fe3O4 nanoparticles

2015 ◽  
Vol 29 (33) ◽  
pp. 1550213 ◽  
Author(s):  
Asif Mahmood ◽  
Shahid Mahmood Ramay ◽  
Yousef S. Al-Zaghayer ◽  
A. N. AlHazaa ◽  
Waheed A. Al Masary ◽  
...  
Keyword(s):  
Electron Microscopy ◽  
Transmission Electron Microscopy ◽  
Room Temperature ◽  
Magnetic Hysteresis ◽  
Measuring System ◽  
Precipitation Method ◽  
Ferromagnetic Behavior ◽  
X Ray ◽  
Transmission Electron ◽  
Auto Combustion

Impurities free ferromagnetic [Formula: see text] was prepared via sol–gel auto-combustion method and then gold was doped with various concentrations 1, 3 and 5 wt.% using conventional deposition–precipitation method. All samples of [Formula: see text] with/without Au doping were characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM), energy-dispersive X-ray spectroscopy (EDS), transmission electron microscopy (TEM) and high-resolution transmission electron microscopy (HRTEM). The room temperature magnetic hysteresis loops of all the samples were measured using a physical property measuring system (PPMS), and the results showed a ferromagnetic behavior at room temperature. The results obtained confirmed the fabrication of magnetite–gold composite nanoparticles. The results showed that the resistance and the magnetic behavior of the samples decrease sharply with the increase of Au concentration indicating semiconducting behavior. The saturation magnetization [Formula: see text] of the bare [Formula: see text] sample (94.72 emu/g) is much higher than that (66.78 emu/g) of the 5 wt.% Au-doped [Formula: see text] sample.

A ppb-Level Formaldehyde Gas Sensor Based on Rose-Like Nickel Oxide Nanoparticles Prepared Using Electrodeposition Process

NANO ◽  
2016 ◽  
Vol 11 (01) ◽  
pp. 1650009 ◽  
Author(s):  
Yong Zhang ◽  
Long-Zhen Xie ◽  
Chao-Xin Yuan ◽  
Chun-Lin Zhang ◽  
Su Liu ◽  
...  
Keyword(s):  
Nickel Oxide ◽  
Indium Tin Oxide ◽  
Gas Sensing ◽  
Operating Temperature ◽  
Oxide Nanoparticles ◽  
Nio Nanoparticles ◽  
Nickel Oxide Nanoparticles ◽  
Glass Substrates ◽  
Ito Glass ◽  
Concentration Properties

In this study, rose-like nickel oxide nanoparticles (diameter of 400–500[Formula: see text]nm) were prepared on indium tin oxide (ITO) glass substrates by a simple electrodeposition in NiSO[Formula: see text]6H2O solution. Scanning electron microscopy (SEM), X-ray diffraction (XRD) and transmission electron microscope (TEM) were used for analysis of the NiO nanoparticles. The effects of operating temperature on the sensor response and the response versus gas concentration properties of the NiO nanorose-based sensors were investigated. We determined the operating temperature of the gas sensors to be 230[Formula: see text]C, considering the proper sensitivity and a rapid response. In addition, gas-sensing characteristics of rose-like NiO nanoparticles to formaldehyde were investigated. It was shown that the sensors exhibited good response ([Formula: see text]/[Formula: see text]) properties to formaldehyde gas at 230[Formula: see text]C, making them to be promising candidates for practical detectors to formaldehyde gas.

Sign in / Sign up

Export Citation Format

Share Document