scholarly journals Shape-controlled CoFe2O4 nanoparticles as an excellent material for humidity sensing

RSC Advances ◽  
2017 ◽  
Vol 7 (88) ◽  
pp. 55778-55785 ◽  
Author(s):  
Yogendra Kumar ◽  
Alfa Sharma ◽  
Parasharam M. Shirage
Keyword(s):  
Cobalt Ferrite ◽  
Ferrite Nanoparticles ◽  
Cofe2o4 Nanoparticles ◽  
Humidity Sensing ◽  
Cobalt Ferrite Nanoparticles ◽  
Controlled Morphology ◽  
Solution Route ◽  
Shape Controlled ◽  
Sensing Performance

The humidity sensing performance of cobalt ferrite nanoparticles (CoFe2O4 NPs) with controlled morphology obtained via a solution route is reported in this work.

Evaluation of humidity sensing properties of TMBHPET thin film embedded with spinel cobalt ferrite nanoparticles

2016 ◽  
Vol 18 (7) ◽  
Author(s):  
Qayyum Zafar ◽  
Mohamad Izzat Azmer ◽  
Abdullah G. Al-Sehemi ◽  
Mohammad S. Al-Assiri ◽  
Abul Kalam ◽  
...  
Keyword(s):  
Thin Film ◽  
Cobalt Ferrite ◽  
Ferrite Nanoparticles ◽  
Humidity Sensing ◽  
Sensing Properties ◽  
Cobalt Ferrite Nanoparticles ◽  
Humidity Sensing Properties

scholarly journals Cobalt Ferrite Nanoparticles: An Innovative Approach for Enhanced Oil Recovery Application

2012 ◽  
Vol 17 ◽  
pp. 115-126 ◽  
Author(s):  
Noorhana Yahya ◽  
Muhammad Kashif ◽  
Nadeem Nasir ◽  
Majid Niaz Akhtar ◽  
Noorasikin Mohd Yusof
Keyword(s):  
Magnetic Field ◽  
Field Strength ◽  
Magnetic Field Strength ◽  
Enhanced Oil Recovery ◽  
Oil Recovery ◽  
Cobalt Ferrite ◽  
Ferrite Nanoparticles ◽  
Cofe2o4 Nanoparticles ◽  
Cobalt Ferrite Nanoparticles ◽  
The Magnetic Field

This Paper Describes the Synthesis of Cobalt Ferrite (CoFe2O4) Nanoparticles and their Application in Enhanced Oil Recovery. Cobalt Ferrite (CoFe2O4) Nanoparticles Were Used as Ferrite Magnetic Feeders with Antenna to Improve the Magnetic Field Strength and Cobalt Ferrite Nanofluid to Improve Oil Recovery. Cobalt Ferrite (CoFe2O4) Nanoparticles Were Synthesized by Sol-Gel Method. these Nanoparticles Were then Characterized by Using X-Ray Diffractometer (XRD) and Field Emission Scanning Electron Microscope (FESEM). Cobalt Ferrite Nanoparticles Annealed at 600oC, the Particle Size Is 51.17nm and 26nm as Determined by XRD and FESEM, Respectively while for the Sample Annealed at 800oC, the Particle Size Is 62nm as Determined by XRD and 60 Nm as Determined by FESEM. Magnetic Measurement Results Show that Initial Permeability of Cobalt Ferrite Powder Increased and Relative Loss Factor Decreased at High Frequency. in Order to Improve the Oil Recovery, Nanoparticles Were Used in Two Different Experiments. in the First Experiment, Nanoparticles Were Used as Magnetic Feeders with an Antenna to Improve the Magnetic Field Strength. in the Second Experiment, Nanoparticles Were Used as Nanofluids. Results Show that the Antenna with Magnetic Feeders Increases the Magnetic Field Strength by 0.94% as Compared to Antenna without Magnetic Feeders in the Water, and by 5.90% in the Air. Magnitude versus Offset (MVO) Study of Antenna with Magnetic Feeders Shows an Increase in Magnetic Field Strength of 275% as Compared to Antenna without Magnetic Feeders. it Is Found that Antenna with Magnetic Feeders Was Able to Recover 29.50% and 20.82% of Original Oil in Place (OOIP) in Core Rock Samples A-1 and A-2 Respectively. the Use of Cobalt Ferrite Nanoparticles as a Nanofluid with Electromagnetic Waves Yielded a Higher Recovery of Residual Oil in Place (ROIP) which Is 31.58% as Compared to 8.70% when it Was Used as Nanofluid Alone. it Is Investigated that due to Absorption of Electromagnetic Waves by Cobalt Ferrite Nanoparticles the Oil Viscosity Reduces which Increase the Oil Recovery. it Can Be Concluded that the Synthesised Cobalt Ferrite (CoFe2O4) Nanoparticles Can Be Potentially Used for Enhanced Oil Recovery in Future.

scholarly journals Correlating the size and cation inversion factor in context of magnetic and optical behavior of CoFe2O4 nanoparticles

RSC Advances ◽  
2020 ◽  
Vol 10 (36) ◽  
pp. 21259-21269 ◽  
Author(s):  
Jitendra Pal Singh ◽  
Jae Yeon Park ◽  
Varsha Singh ◽  
So Hee Kim ◽  
Weon Cheol Lim ◽  
...  
Keyword(s):  
Synchrotron Radiation ◽  
Cobalt Ferrite ◽  
Ferrite Nanoparticles ◽  
Cofe2o4 Nanoparticles ◽  
Cobalt Ferrite Nanoparticles ◽  
Size Dependent ◽  
Dependent Behavior ◽  
Optical Behavior

Herein, the size dependent behavior of cobalt ferrite nanoparticles was investigated using synchrotron radiation based techniques.

scholarly journals Synthesis of magnetic cobalt ferrite nanoparticles with controlled morphology, monodispersity and composition: the influence of solvent, surfactant, reductant and synthetic conditions

Nanoscale ◽  
2015 ◽  
Vol 7 (46) ◽  
pp. 19596-19610 ◽  
Author(s):  
Le T. Lu ◽  
Ngo T. Dung ◽  
Le D. Tung ◽  
Cao T. Thanh ◽  
Ong K. Quy ◽  
...  
Keyword(s):  
Oleic Acid ◽  
Reaction Time ◽  
Cobalt Ferrite ◽  
Ferrite Nanoparticles ◽  
High Quality ◽  
Cobalt Ferrite Nanoparticles ◽  
Controlled Morphology ◽  
Influence Of Solvent

Influence of synthetic conditions (e.g., ratio of oleic acid/ oleylamine concentrations, reaction time, solvents and reductants on the formation of high quality CoFe2O4 nanoparticles was comprehensively investigated.

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