scholarly journals Synergic effects of the decoration of nickel oxide nanoparticles on silicon for enhanced electrochemical performance in LIBs

2020 ◽  
Vol 2 (2) ◽  
pp. 823-832
Author(s):  
Ujjwala V. Kawade ◽  
Sunil R. Kadam ◽  
Milind V. Kulkarni ◽  
Bharat B. Kale
Keyword(s):  
Electrochemical Performance ◽  
Nickel Oxide ◽  
Volume Expansion ◽  
Oxide Nanoparticles ◽  
Nio Nanoparticles ◽  
Nickel Oxide Nanoparticles ◽  
Effective Suppression ◽  
Enhanced Electrochemical Performance

Decoration of NiO nanoparticles on silicon confers enhanced stable capacity due to the effective suppression of the volume expansion of silicon in LIBs.

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.

scholarly journals Effect of nickel oxide nanoparticles on protease activity in brewing industry

2021 ◽  
Vol 845 (1) ◽  
pp. 012110
Author(s):  
D V Karpenko ◽  
S A Kanaev
Keyword(s):  
Nickel Oxide ◽  
Enzyme Preparation ◽  
Molecular Nitrogen ◽  
Reaction Medium ◽  
Oxide Nanoparticles ◽  
Industrial Complex ◽  
Nio Nanoparticles ◽  
Nickel Oxide Nanoparticles ◽  
Barley Malt ◽  
Amine Nitrogen

Abstract Intensive use of nanoparticles on an industrial scale leads to an increase in their content in the environment. This increases the risks of nano-sized objects entering the technological chains of the processing industries of the agro-industrial complex, in particular, brewing. The paper presents the results of the studies of the effect of nickel oxide nanoparticles used in various industries on the activity of the proteolytic type of enzyme preparation Neutrase 1.5MG, as well as on the results of laboratory mashing of light barley malt. The effect of different concentrations of NiO nanoparticles on the accumulation of low molecular weight nitrogenous substances during gelatin hydrolysis in model media was determined. It was found that if the content of nanoparticles exceeds 0.25 mg/cm3, the proteolytic capacity of the enzyme preparation is reduced up to 70% compared to the control at the concentration of nickel oxide nanopreparation of 2.0 mg/cm3. The experiments showed that an increase in the duration of contact between nanoparticles and proteases of the enzyme preparation in the reaction medium did not lead to an increase in the inhibitory effect of the nano-sized NiO. The laboratory mashing revealed more pronounced negative effect of nickel oxide nanoparticles on the accumulation of low-molecular nitrogen compounds. It is determined that in the presence of NiO nanopreparation, the hydrolysis efficiency of the starchy components of light barley malt is reduced. As a result, according to a number of indicators (concentration of amine nitrogen, reducing substances), the first wort obtained by mashing in the presence of nickel oxide nanoparticles at both lower (0.25 mg/cm3) and higher (2.0 mg/cm3) concentrations is inferior to samples obtained in the absence of nano-sized particles. Based on the above data, it is concluded that the presence of NiO nanoparticles in brewing environments is undesirable.

Fabrication and electrochemical performance of nickel oxide nanoparticles anchored titanium dioxide nanotube array hybrid electrode

2020 ◽  
Vol 13 (04) ◽  
pp. 2051017
Author(s):  
Wenyun Bao ◽  
Ye Wu ◽  
Yibing Xie ◽  
Chen Yao
Keyword(s):  
Energy Storage ◽  
Electrochemical Performance ◽  
Nickel Oxide ◽  
Titanium Substrate ◽  
Discharge Process ◽  
Nio Nanoparticles ◽  
Supercapacitor Electrode ◽  
Nickel Oxide Nanoparticles ◽  
Transfer Resistance ◽  
Nanotube Array

Nickel oxide-titania nanotube array hybrid grown on titanium substrate (NiO–TiO2/Ti) is designed as supercapacitor electrode for energy-storage application. The electroactive NiO is fully incorporated into independent titania nanotubes to form NiO–TiO2 nanotube array hybrid through differential pulse voltammetry electrodeposition process and thermal dehydration process. NiO nanoparticles are uniformly anchored on TiO2 nanotube walls to keep open pore mouth of nanochannels. The charge transfer resistance at the interface of electrode/electrolyte is highly declined from 76.3[Formula: see text][Formula: see text] of TiO2/Ti to 1.1[Formula: see text][Formula: see text] of NiO–TiO2/Ti. The electrochemical performance is highly improved from the electrical double-layer capacitance of 0.16[Formula: see text]mF[Formula: see text][Formula: see text] for TiO2/Ti to Faradaic capacitance of 18.75[Formula: see text]mF[Formula: see text][Formula: see text] for NiO–TiO2/Ti in 1.0[Formula: see text]M KOH electrolyte due to high electroactivity of NiO. The capacitance retention after 1000 cycles achieves 83.86% for NiO–TiO2/Ti and 97.49% for TiO2/Ti. The highly electrochemical stability of TiO2/Ti contributes to high cycling stability of NiO–TiO2/Ti in a continuous charge–discharge process. The superior capacitance of NiO–TiO2/Ti nanotube array hybrid is mostly attributed to its accessible redox reactive sites of NiO nanoparticles on TiO2 nanotube walls. NiO–TiO2/Ti nanotube array hybrid can act as a promising energy-storage electrode material.

scholarly journals Chitosan capped nickel oxide nanoparticles as a saturable absorber in a tunable passively Q-switched erbium doped fiber laser

RSC Advances ◽  
2018 ◽  
Vol 8 (45) ◽  
pp. 25592-25601 ◽  
Author(s):  
Harith Ahmad ◽  
Siti Aisyah Reduan ◽  
Norazriena Yusoff
Keyword(s):  
Thin Film ◽  
Nickel Oxide ◽  
Fiber Laser ◽  
Saturable Absorber ◽  
Oxide Nanoparticles ◽  
Nio Nanoparticles ◽  
Nickel Oxide Nanoparticles ◽  
Chloride Hexahydrate ◽  
Erbium Doped

Nickel oxide (NiO) nanoparticles prepared from a nickel(ii) chloride hexahydrate precursor are used to form a chitosan capped NiO nanoparticle thin film that serves as a saturable absorber in a passively Q-switched erbium doped fiber laser.

Synthesis of NiO Nanoparticles by Microwave Assisted and Molten Salts Methods

2016 ◽  
Vol 721 ◽  
pp. 71-75 ◽  
Author(s):  
Jānis Grabis ◽  
Gundega Heidemane ◽  
Aija Krūmiņa
Keyword(s):  
Nickel Oxide ◽  
Crystallite Size ◽  
Molten Salts ◽  
Urea Solution ◽  
Microwave Assisted Synthesis ◽  
Oxide Nanoparticles ◽  
Nio Nanoparticles ◽  
Nickel Oxide Nanoparticles ◽  
Microwave Assisted ◽  
Direct Formation

Nickel oxide nanoparticles were prepared via molten salts and microwave assisted synthesis from nickel nitrate and the parameters of obtained nanopowders were compared. NiO nanoparticles with crystallite size in the range of 6-8 nm have been prepared by combining microwave assisted treatment of Ni (NO3)2 and urea solution with calcination at 300-320 °C. Molten salts (NaNO2-NaCl) ensured direct formation of NiO from Ni (NO3)2.6H2O and salts mixture at 350 °C but crystallite size of the particles reached 51-69 nm.

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