Microstructure, structural, optical and piezoelectric properties of BiFeO3 nanopowder synthesized from sol-gel

Ganesh, R. Sankar; Sharma, Sanjeev K.; Lee, Sejoon; Divyapriya, B.; Elamaran, Durgadevi; Raji, P.; Ponnusamy, S.; Muthamizhchelvan, C.; Hayakawa, Y.; Kim, Deuk Young

doi:10.1016/j.cap.2016.12.008

Cited by 26 publications

(3 citation statements)

References 46 publications

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“…The resolution of the crystal plane is ca. 0.395 nm, which is similar to the results of the literature studies [30,31]. Figure 2b,d show that the coupling of linear CNTs with g-C 3 N 4 produces the composite with a large specific surface area, while the morphology of CNTs does not significantly change.…”

Section: Resultssupporting

confidence: 89%

“…In Figure 6d, the N−C 3 tertiary nitrogen structure and sp 2 C−N=C hybrid structure formed by the N atom as well as the C 2 −N−H structure formed by the attachment of the amide N-containing group to the edge of the layer with binding energies of 399.31, 399.06, and 401.17 eV, respectively [36,38]. As shown in Figure 6e, the XPS spectrum of Bi can be distinguished by the presence of the 4 f 7/2 and 4 f 5/2 Gaussian peaks with binding energies of 159.47 eV and 164.77 eV, respectively, which correspond to the spin-orbit of Bi [31]. From these results, it can be concluded that the Bi element existed in the form of Bi 3+ oxide in the produced composite [42].…”

Section: Resultsmentioning

confidence: 99%

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Synergy of Photocatalysis and Adsorption for Simultaneous Removal of Hexavalent Chromium and Methylene Blue by g-C3N4/BiFeO3/Carbon Nanotubes Ternary Composites

Huo

Wang

et al. 2019

IJERPH

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A novel graphite-phase carbon nitride (g-C3N4)/bismuth ferrite (BiFeO3)/carbon nanotubes (CNTs) ternary magnetic composite (CNBT) was prepared by a hydrothermal synthesis. Using this material, Cr(VI) and methylene blue (MB) were removed from wastewater through synergistic adsorption and photocatalysis. The effects of pH, time, and pollutant concentration on the photocatalytic performance of CNBT, as well as possible interactions between Cr(VI) and MB species were analyzed. The obtained results showed that CNTs could effectively reduce the recombination rate of electron-hole pairs during the photocatalytic reaction of the g-C3N4/BiFeO3 composite, thereby improving its photocatalytic performance, while the presence of MB increased the reduction rate of Cr(VI). After 5 h of the simultaneous adsorption and photocatalysis by CNBT, the removal rates of Cr(VI) and MB were 93% and 98%, respectively. This study provides a new theoretical basis and technical guidance for the combined application of photocatalysis and adsorption in the treatment of wastewaters containing mixed pollutants.

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Section: Resultssupporting

confidence: 89%

Section: Resultsmentioning

confidence: 99%

Synergy of Photocatalysis and Adsorption for Simultaneous Removal of Hexavalent Chromium and Methylene Blue by g-C3N4/BiFeO3/Carbon Nanotubes Ternary Composites

Huo

Wang

et al. 2019

IJERPH

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“…The fabricated piezoelectric device demonstrated an output voltage of 0.4 V upon applying the normal pressure from a human finger to the device. (15) Yang et al proposed a BFO-based dielectric capacitor and demonstrated its high energy density, superior thermal stability, and reliable bending endurance. (16) Shi et al proposed a high-frequency current sensor based on lead-free multiferroic BFO ceramic.…”

Section: Introductionmentioning

confidence: 99%

Development of Lead-free Force-feedback Tactile Sensor Fabricated from BiFeO3 Piezoelectric Film

Lin¹,

Li²,

Chen³

et al. 2021

Sensors and Materials

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In this study, we develop a flexible lead-free BiFeO 3 (BFO) film sensor that can be applied on complex surfaces of devices. This sensor is fabricated by depositing BFO thin film on a polyimide (PI)-coated copper substrate. The sol-gel (SG) method and spin-coating method are utilized to prepare the BFO piezoelectric film. Two different spin-coating processes under three different sets of parameters and two different annealing temperatures are used in the fabrication. X-ray diffraction (XRD) and scanning electron microscopy are used to examine the crystallinity and surface topography of the BFO thin films, respectively. A lifetime test is performed on the device to validate the robustness of its piezoelectric properties, and a linear scaling relationship between the force and output response is obtained. We propose suitable conditions for preparing the piezoelectric film and demonstrate the reliability of this sensor.

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Poly(vinylidene fluoride) nanofiber‐based piezoelectric nanogenerators using reduced graphene oxide/polyaniline

Ünsal

Altın

Bedeloğlu

2019

J of Applied Polymer Sci

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Recently, piezoelectric nanogenerators have received great interest as they can convert waste mechanical and radiative energy to electricity and can be used in self‐energy generating systems and sensor technologies. In this study, electrospun poly(vinylidene fluoride) (PVDF) nanofiber‐based piezoelectric nanogenerators with reduced graphene oxide (rGO), polyaniline (PANI), and PANI‐functionalized rGO (rGOPANI) have been developed. Two different types of nanofiber mats were produced: First, rGO‐ and rGOPANI‐doped PVDF nanofiber mats and second, rGO, PANI and rGOPANI‐spray‐coated PVDF nanofiber mats that have worked as nanogenerators' electrodes. Then, characterizations of samples were performed in terms of piezoelectricity, Fourier transform infrared (FTIR) spectrophotometric, X‐ray diffractions (XRD), and scanning electron microscopy analyses. FTIR and XRD results confirmed that piezoelectric β‐crystalline phase of PVDF occurred after the electrospinning process. Besides, maximum output voltages were obtained as 7.84 and 10.60 V for rGO‐doped PVDF and rGOPANI‐coated PVDF nanofiber mats, respectively. As a result, the doped nanofibers were found to be more successful due to the higher device accuracy in sensor technologies compared with spray‐coated samples. However, spray‐coating method proved to be more suitable technique for the production of nanogenerators on an industrial scale in terms of fast and large‐scale applicability. © 2019 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2020, 137, 48517.

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Microstructure, structural, optical and piezoelectric properties of BiFeO3 nanopowder synthesized from sol-gel

Cited by 26 publications

References 46 publications

Synergy of Photocatalysis and Adsorption for Simultaneous Removal of Hexavalent Chromium and Methylene Blue by g-C3N4/BiFeO3/Carbon Nanotubes Ternary Composites

Synergy of Photocatalysis and Adsorption for Simultaneous Removal of Hexavalent Chromium and Methylene Blue by g-C3N4/BiFeO3/Carbon Nanotubes Ternary Composites

Development of Lead-free Force-feedback Tactile Sensor Fabricated from BiFeO3 Piezoelectric Film

Poly(vinylidene fluoride) nanofiber‐based piezoelectric nanogenerators using reduced graphene oxide/polyaniline

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