Magnetic Behavior of Polymorph Composite Nickel Titanate Nanofibers

2021 ◽  
Author(s):  
Sachin Kumar Balakrishnamurthy ◽  
C DhanaSekhar ◽  
Srinivasan Anandhan ◽  
Sreeram K Kalpathy
Keyword(s):  
Composite Nanofibers ◽  
Sol Gel ◽  
Magnetic Behavior ◽  
Electrospinning Process ◽  
Acrylonitrile Copolymer ◽  
Nickel Titanate ◽  
Styrene Acrylonitrile

Polymorph (spinel/ilmenite) composite nanofibers of nickel titanate (NTO) were prepared by sol-gel assisted electrospinning process followed by pyrolysis using styrene acrylonitrile copolymer as precursor, at three different pyrolysis soaking temperatures...

The Effect of Calcination Temperature on the Surface Evolution and Photocatalysis Activity of Co-Doped PVAc/TiO2 Composite Nanofibers

2011 ◽  
Vol 331 ◽  
pp. 14-18
Author(s):  
Ning Wu ◽  
Ya Nan Jiao ◽  
Zhi Qing Yuan ◽  
Yun Xing Liang ◽  
Li Chen
Keyword(s):  
Calcination Temperature ◽  
Composite Nanofibers ◽  
Sol Gel ◽  
Crystal Form ◽  
Electrospinning Process ◽  
Surface Evolution ◽  
Tio2 Nanofibers ◽  
X Ray ◽  
Surface Morphologies ◽  
Co Doped

The Fe3+,La3+ co-doped polyvinyl acetate(PVAc)/titanium dioxide(TiO2) composite nanofibers were firstly prepared by combining sol-gel method and electrospinning process, and then calcined under 300°Cand 600°C separately. The effect of calcination temperature on structures, surface morphologies, crystalline state, elemental composition and photocatalysis activity were characterized by scanning electron microscope (SEM), atomic force microscope (AFM), X-ray Diffraction (XRD) , energy dispersive X-ray spectroscopy (EDX) and ultraviolet-visible spectrophotometer(UV-Vis) respectively. The SEM and AFM images showed that the nanofibers were randomly distributed to form the fibrous web, the diameters and surface roughness of nanofibers were obviously changed as the calcination tempreture increasing. The EDX analysis and XRD spectra indicated the percentage of C,O,Ti elements varied as the increase of tempreture and the formation of anatase crystal form TiO2 nanofibers under 600°C.The UV-Vis curves revealed strong adsorption to methylene blue under 600°C calcination.

Preparation of TiO2/WO3 Composite Nanofibers by Electrospinning

2017 ◽  
Vol 751 ◽  
pp. 296-301 ◽  
Author(s):  
Patthamapa Chakornpradit ◽  
Manisara Phiriyawirut ◽  
Vissanu Meeyoo
Keyword(s):  
Photocatalytic Activity ◽  
Fiber Length ◽  
Composite Nanofibers ◽  
Sol Gel ◽  
Fiber Surface ◽  
Average Diameter ◽  
Electrospinning Process ◽  
Photocatalytic Efficiency ◽  
Methylene Blue Degradation ◽  
Scanning Electron

Preparation of cellulose acetate (CA)/TiO2/WO3 composite nanofibers via sol-gel with electrospinning process for improving the photocatalytic efficiency was conducted. CA was removed from fibers by a heat treatment. Microstructure and elemental composition of TiO2/WO3 nanofibers were evaluated by scanning electron microscope (SEM) and energy dispersive microscopy (EDX), respectively. The results showed that the nanofibers of TiO2 and WO3 were achieved with the average diameter range of ca. 310-701 nm and both TiO2 and WO3 are well dispersed along fiber length, confirmed by an EDX analysis. The results also showed that the smoothness of fiber surface decreased with decreasing WO3 contents. The photocatalytic activity of the materials were also tested for methylene blue degradation. TiO2/WO3 exhibited the highest activity comparing to pure TiO2 and WO3. Moreover, it was found that a TiO2/WO3 specimen possessed the energy storage ability as a result, it showed the photocatalytic activity in the absence of light.

Structural, Morphological and Magnetic Characterization of Sm-substituted Ni-Zn Ferrite

2020 ◽  
Vol 10 (2) ◽  
pp. 152-156 ◽  
Author(s):  
Muhammad Hanif bin Zahari ◽  
Beh Hoe Guan ◽  
Lee Kean Chuan ◽  
Afiq Azri bin Zainudin
Keyword(s):  
Magnetic Properties ◽  
Rare Earth ◽  
Saturation Magnetization ◽  
Sol Gel ◽  
Magnetic Behavior ◽  
Rare Earth Ions ◽  
Ion Concentration ◽  
Zn Ferrite ◽  
Auto Combustion ◽  
Combustion Technique

Background: Rare earth materials are known for its salient electrical insulation properties with high values of electrical resistivity. It is expected that the substitution of rare earth ions into spinel ferrites could significantly alter its magnetic properties. In this work, the effect of the addition of Samarium ions on the structural, morphological and magnetic properties of Ni0.5Zn0.5SmxFe2-xO4 (x=0.00, 0.02, 0.04, 0.06, 0.08, 0.10) synthesized using sol-gel auto combustion technique was investigated. Methods: A series of Samarium-substituted Ni-Zn ferrite nanoparticles (Ni0.5Zn0.5SmxFe2-xO4 where x=0.00, 0.02, 0.04, 0.06, 0.08, 0.10) were synthesized by sol-gel auto-combustion technique. Structural, morphological and magnetic properties of the samples were examined through X-Ray Diffraction (XRD), Field-Emission Scanning Electron Microscope (FESEM) and Vibrating Sample Magnetometer (VSM) measurements. Results: XRD patterns revealed single-phased samples with spinel cubic structure up to x= 0.04. The average crystallite size of the samples varied in the range of 41.8 – 85.6 nm. The prepared samples exhibited agglomerated particles with larger grain size observed in Sm-substituted Ni-Zn ferrite as compared to the unsubstituted sample. The prepared samples exhibited typical soft magnetic behavior as evidenced by the small coercivity field. The magnetic saturation, Ms values decreased as the Sm3+ concentration increases. Conclusion: The substituted Ni-Zn ferrites form agglomerated particles inching towards more uniform microstructure with each increase in Sm3+ substitution. The saturation magnetization of substituted samples decreases with the increase of samarium ion concentration. The decrease in saturation magnetization can be explained based on weak super exchange interaction between A and B sites. The difference in magnetic properties between the samples despite the slight difference in Sm3+ concentrations suggests that the properties of the NiZnFe2O4 can be ‘tuned’, depending on the present need, through the substitution of Fe3+ with rare earth ions.

Acclimating the magnetic behavior of highly (117) oriented Bi4Ti 3-xMnxO12 thin films prepared sol-gel spin coating method

2020 ◽  
Author(s):  
A. Amali Roselin ◽  
N. Anandhan ◽  
I. Joseph Paneer Doss ◽  
G. Gopu ◽  
K. P. Ganesan ◽  
...  
Keyword(s):  
Thin Films ◽  
Spin Coating ◽  
Sol Gel ◽  
Magnetic Behavior ◽  
Spin Coating Method ◽  
Coating Method

The Dispersion of MWCNTS in Acetone Solution of SAN

2015 ◽  
Vol 1088 ◽  
pp. 8-12
Author(s):  
Xin Long Ling ◽  
Ling Jiao Xie ◽  
Li Ming Zou ◽  
Yi Zhe Wei
Keyword(s):  
Particle Size ◽  
Average Particle Size ◽  
Acetone Solution ◽  
Average Particle ◽  
Ultrasonic Power ◽  
Acrylonitrile Copolymer ◽  
Mass Percent ◽  
Ultrasonic Time ◽  
Styrene Acrylonitrile

MWCNTs were dispersed in acetone solution of styrene-acrylonitrile copolymer (SAN). Four factors which had effect on the average particle size, including the ratio of MWCNTs to SAN, the mass percent of MWCNTs, the ultrasonic power and the ultrasonic time, were studied. The optimal dispersion conditions of MWCNTs in acetone solution of SAN were the ratio of MWCNTs to SAN 1:3, the mass percent of MWCNTs 0.25%, the ultrasonic power 100%, and the ultrasonic time 30 min.

Dielectric and Magnetic Behavior of Sol-Gel Grown BiFeO[sub 3] Multiferroic

2011 ◽  
Author(s):  
A. B. Ravalia ◽  
M. V. Vagadia ◽  
U. D. Khachar ◽  
R. R. Doshi ◽  
P. S. Solanki ◽  
...  
Keyword(s):  
Sol Gel ◽  
Magnetic Behavior

scholarly journals Ionic Liquid/Styrene-Acrylonitrile Copolymer Nanofibers as Chemiresistor for Alcohol Vapours

2012 ◽  
Vol 33 (9) ◽  
pp. 2867-2872 ◽  
Author(s):  
Min-Jae Kim ◽  
Eun-Soo Kang ◽  
Dong-Wha Park ◽  
Bong-Sup Shim ◽  
Sang-Eun Shim
Keyword(s):  
Ionic Liquid ◽  
Acrylonitrile Copolymer ◽  
Styrene Acrylonitrile

Structural Characteristics and Piezoelectric Properties of Electrospun Piezoelectric nanofibers

2005 ◽  
Vol 888 ◽  
Author(s):  
Yong Shi ◽  
Shiyou Xu ◽  
Sang-Gook Kim ◽  
Matthew Libera
Keyword(s):  
Piezoelectric Properties ◽  
Perovskite Phase ◽  
Structural Characteristics ◽  
Sol Gel ◽  
Electrospinning Process ◽  
Hysteresis Curve ◽  
Micro Fabrication ◽  
Pure Perovskite Phase ◽  
Promising Application

ABSTRACTThis paper reports the development and characterization of PZT nanofibers with average diameters ranged from 50 to 150 nm for various sensing and actuation applications. PZT nano fibers have been developed by sol-gel electrospinning process. Both randomly distributed and uniaxially aligned PZT fibers were obtained from the sol-gel solution with viscosity modified by polyvinyl pyrrolidone (PVP). The diameters of the nano fibers can be further reduced or controlled for different applications. The morphology and structure of the nanofibers were examined with SEM, TEM and XRD. We used two-step process to anneal the electrospun fibers and XRD confirmed that pure perovskite phase was formed after the as-spun fibers being annealed at about 650°C. TEM results showed that the grain size of the fibers was about 10 nm. Microelectromechanical (MEMS) based micro-fabrication technologies were used to assist the development of the nano-fibers in designing the test samples, depositing and patterning the electrodes, and also testing the performance of the nano fibers. Different approaches have been explored to fabricate the uniaxially aligned nano fibers. SEM results showed that partial aligned PZT nano-fibers were obtained on the pre-patterned substrats. Interdigitated Electrodes were evaporated on the partial aligned fibers by using shadow mask. Hysteresis curve of the nano piezoelectric fibers was also obtained, however further tests are still needed to get accurate measurement. The obtained PZT nanofibers have promising application potentials in designing and enabling micro and nano devices.

Sign in / Sign up

Export Citation Format

Share Document