Surface area- and mass-based comparison of fine and ultrafine nickel oxide lung toxicity and augmentation of allergic response in an ovalbumin asthma model

Nanocrystalline nickel oxide (NiO) and copper oxide (CuO) have been synthesized in a water-in-oil microemulsion. The as-synthesized samples were characterized by X-ray diffraction (XRD), Electron Spin Resonance (E.S.R.), transmission electron microscopy (T.E.M.), and Specific Surface Area (S.S.A.). The particle size of nickel oxide and copper oxide can be controlled from 10.0 to 21.5 and 12.5 to 25.0 nm, respectively, at a different time of calcination temperature with a fixed proportion of water, surfactant, and oil in the microemulsion. Also, the results showed that the specific surface area (89.96 m2 g-1) and pore diameter (8.11 nm) of the prepared nano NiO are higher than the specific surface area (71.96 m2 g-1) and pore diameter (3.71 nm) of the prepared nano CuO. An adsorption test was carried out to show the efficiency of these prepared NiO and CuO nanoparticles for the Adsorption of T.N.T. in an aqueous solution. The removal efficiencies of both nano NiO and CuO were achieved at 90.06% and 77.0%, respectively.Additionally, NiO and CuO nanoparticles were regenerated for five cycles. The Kinetic models of Pseudo first-order and pseudo-second-order were described. The results demonstrated that T.N.T. adsorption on both nano adsorbents follows the pseudo-second-order model.

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Decomposition of hydrogen peroxide on nickel oxide-manganese sesquioxide two-component catalysts and effect of ionizing radiation on them

Collection of Czechoslovak Chemical Communications ◽

10.1135/cccc19811860 ◽

1981 ◽

Vol 46 (8) ◽

pp. 1860-1875 ◽

Cited By ~ 10

Author(s):

Viliam Múčka

Keyword(s):

Hydrogen Peroxide ◽

Catalytic Activity ◽

Nickel Oxide ◽

Surface Area ◽

Chemical Properties ◽

Unit Surface Area ◽

Hydrogen Peroxide Decomposition ◽

Specific Catalytic Activity ◽

Peroxide Decomposition ◽

Two Component

The catalytic and some physico-chemical properties were studied of nickel oxide-manganese sesquioxide two-component catalysts with various proportions of the constituents. Decomposition of hydrogen peroxide in aqueous solution with the initial concentration 1.2 mol l-1 served as testing reaction. The catalyst components affect each other; the effect, being highest in the region of 20-30 mol.% manganese sesquioxide, brings about an enhanced dispersity of the system, with the result of increased surface area, increased amount of overstoichiometric oxygen and deficit in chemical analysis. Furthermore, the mutual component influencing appears in the specific catalytic activity of the system and in the amount of overstoichiometric oxygen per unit surface area, which is highest at 85 mol.% Mn2O3. A model of the mechanism is suggested for the reaction under study, based on the concept of bivalent catalytic centres, assuming that during the reaction, the high valency manganese species are gradually reduced as far as divalent manganese; this accounts for the occurrence of the observed two or three stages of hydrogen peroxide decomposition. Neither the mechanism of interaction of the two oxides nor the mechanism of the hydrogen peroxide decomposition changes on prior gamma irradiation of the catalyst. However, the irradiation affects markedly the catalytic activity of the system, the effect for catalyst of different composition being qualitatively different. Within the suggested concept of the reaction mechanism, the observed changes can be interpreted in terms of formation of non-eqilibrium charge carriers (electrons) resulting from the ionization both in the surface layer and in the catalyst bulk; after stabilization on the surface, the carriers may serve as adsorption centres for chemisorption of oxygen or may recombine with the catalytic centres of the reaction under study.

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Synthesis and catalytic performance for toluene combustion of high surface area mesoporous nickel oxide

Scientia Sinica Chimica ◽

10.1360/n032015-00090 ◽

2016 ◽

Vol 46 (2) ◽

pp. 215-221

Author(s):

Lu Xia ◽

Jingting Liu ◽

Decai Bao ◽

Yunsheng Xia ◽

Qilin Lu

Keyword(s):

Nickel Oxide ◽

Surface Area ◽

High Surface ◽

High Surface Area ◽

Catalytic Performance

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Silver particle-loaded nickel oxide nanosheet arrays on nickel foam as advanced binder-free electrodes for aqueous asymmetric supercapacitors

RSC Advances ◽

10.1039/c7ra06252d ◽

2017 ◽

Vol 7 (66) ◽

pp. 41771-41778 ◽

Cited By ~ 6

Author(s):

Shuxing Wu ◽

Kwan San Hui ◽

Kwun Nam Hui ◽

Je Moon Yun ◽

Kwang Ho Kim

Keyword(s):

Electron Transport ◽

Nickel Oxide ◽

Surface Area ◽

Silver Particle ◽

Nickel Foam ◽

Asymmetric Supercapacitors ◽

Nanosheet Arrays ◽

Binder Free ◽

Ag Particle ◽

Electroactive Surface Area

Ag particle-loaded NiO nanosheet arrays promise rapid ion and electron transport, large electroactive surface area, and great structural stability.

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Novel synthesis of nickel oxide microsphere with high surface area and its catalytic application for carbon dioxide reforming of methane

Journal of Central South University ◽

10.1007/s11771-014-2119-9 ◽

2014 ◽

Vol 21 (5) ◽

pp. 1747-1751

Author(s):

Xu Wu ◽

Zheng-huang Wu ◽

Xia An ◽

Xian-mei Xie

Keyword(s):

Carbon Dioxide ◽

Nickel Oxide ◽

Surface Area ◽

High Surface ◽

High Surface Area ◽

Carbon Dioxide Reforming ◽

Catalytic Application ◽

Novel Synthesis

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Thermal Conductivity of Nickel Oxide Nanoparticles Synthesized by Combustion Method

MRS Proceedings ◽

10.1557/proc-1256-n06-21 ◽

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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