Analysis of the long term lung retention of cobalt oxide and cobalt nitrate aerosols in dogs

In the present work, cobalt oxide nanoparticles were prepared by using precipitation method. The cobalt nitrate [Co (No3)2] and ammonium oxalate [C2H8N2O4] were used as precursors for the synthesis of cobalt oxide nanoparticles and the resultant product was Calcinated at 400˚C for 2 hrs. The synthesized nanoparticles were characterized by X-ray diffraction (XRD), Fourier Transform Infrared Spectroscopy (FTIR), Scanning Electron Microscope (SEM), Energy Dispersive X-ray Spectroscopy (EDAX) to analyze the structural and morphological properties. The XRD pattern of the synthesized cobalt oxide nanoparticles exhibits cubic structure with the average crystalline size of 8.06 nm. The functional groups of the synthesized nanoparticles were confirmed by using FTIR spectrum (400 to 4000 cm-1). In the synthesized sample and its purity were confirmed from EDAX spectrum. The surface morphology of the synthesized Co3O4 nanoparticles shows spherical morphology. The optical properties of the synthesized cobalt oxide nanoparticles were investigated by photoluminescence spectrum which shows a minor emission at around 440 nm.

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Long term performance cobalt oxide silica membrane module for high temperature H2 separation

Energy & Environmental Science ◽

10.1039/c2ee03247c ◽

2012 ◽

Vol 5 (2) ◽

pp. 5820 ◽

Cited By ~ 84

Author(s):

Christelle Yacou ◽

Simon Smart ◽

João C. Diniz da Costa

Keyword(s):

High Temperature ◽

Cobalt Oxide ◽

Membrane Module ◽

Silica Membrane ◽

Long Term Performance ◽

Term Performance

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Novel Low-Temperature Synthesis and Characterization of Lithium Cobalt Dioxide for Lithium Rechargeable Batteries

Solid State Phenomena ◽

10.4028/www.scientific.net/ssp.124-126.955 ◽

2007 ◽

Vol 124-126 ◽

pp. 955-958

Author(s):

Seong In Moon ◽

Ming Zhe Kong ◽

Pasikkasu Periasamy ◽

Hyun Soo Kim

Keyword(s):

Cobalt Oxide ◽

Cobalt Nitrate ◽

Rechargeable Batteries ◽

Layered Compound ◽

Lithium Nitrate ◽

Lithium Cobalt Oxide ◽

Solution Combustion ◽

Lithium Rechargeable Batteries ◽

Particle Size Analyzer ◽

Lithium Cobalt

Lithium cobalt oxide is synthesized by a novel solution combustion procedure. In this synthesis, a solution mixture of lithium nitrate, cobalt nitrate and glycine fuel is heated to 500, 600 and 700 °C for 3 hours to obtain an ordered crystalline-layered compound. Physical properties of the synthesized cathode materials were evaluated using a XRD, SEM and particle size analyzer. The charge-discharge cycling characteristics of the synthesized lithium cobalt oxide heated at 700 °C exhibited better performance than other materials.

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Multiwalled Carbon Nanotubes Decorated with Cobalt Oxide Nanoparticles

Journal of Nanomaterials ◽

10.1155/2012/695453 ◽

2012 ◽

Vol 2012 ◽

pp. 1-5 ◽

Cited By ~ 9

Author(s):

D. G. Larrude ◽

P. Ayala ◽

M. E. H. Maia da Costa ◽

F. L. Freire

Keyword(s):

Carbon Nanotubes ◽

Cobalt Oxide ◽

Multiwalled Carbon Nanotubes ◽

Cobalt Nitrate ◽

Oxide Nanoparticles ◽

Nitrate Hexahydrate ◽

Multiwalled Carbon ◽

Cobalt Oxide Nanoparticles ◽

Electron Microscopy Analysis ◽

Average Size

Multiwalled carbon nanotubes (MWCNTs) synthesized by spray pyrolysis were decorated with cobalt oxide nanoparticles using a simple synthesis route. This wet chemistry method yielded nanoparticles randomly anchored to the surface of the nanotubes by decomposition of cobalt nitrate hexahydrate diluted in acetone. Electron microscopy analysis indicated that dispersed particles were formed on the MWCNTs walls. The average size increased with the increasing concentration of cobalt nitrate in acetone in the precursor mixture. TEM images indicated that nanoparticles were strongly attached to the tube walls. The Raman spectroscopy results suggested that the MWCNT structure was slightly damaged after the nanoparticle growth.

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Enhanced Photocatalytic Activity and Magnetic Properties of CNTs/Sn-doped Co3O4 Nanocomposite

10.21203/rs.3.rs-184292/v1 ◽

2021 ◽

Author(s):

Mahdi Kazazi ◽

Mahdi Norouzi ◽

Banafsheh Moradi

Keyword(s):

Photocatalytic Activity ◽

Cobalt Oxide ◽

Cobalt Nitrate ◽

Green Technology ◽

X Ray Diffraction ◽

Spinel Type ◽

Visible Absorption ◽

X Ray ◽

Responsible Mechanism ◽

Oxide Nanorods

Abstract Photocatalysis is a green technology which transforms available photon energy into useful chemical energy. The reaction mechanism is based on the ability to create electron-hole pairs under appropriate light. Semiconductors have attracted great attention in photocatalysts because of their high photosensitivity. Spinel–type cobalt oxide nanorods have been prepared by a simple hydrothermal method using cobalt nitrate as precursor. Sn-doped Co3O4 was composited with carbon nanotubes for better photocatalytic activity. An extensive characterization of the prepared samples was carried out using X-ray diffraction (XRD), field emission scanning electron microscopy (FESEM), energy dispersive X-ray spectroscopy (EDS), Fourier transform infrared spectroscopy (FTIR), Vibrating sample magnetometer (VSM) and UV–Visible absorption spectroscopy. The XRD results show the formation of Co3O4 phase with FCC structure, FESEM confirms the nanorods morphology of the cobalt oxide and the VSM taken at room temperature shows an antiferromagnetic behavior. The investigation of photocatalytic activity of Co3O4 based was done by methyl orange dye. At the end, the responsible mechanism of CNT/Sn-CO was discussed.

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