The Influence of Fe2O3 Addition on the Tio2 Structure and Photoactivity Properties

Wahyuningsih, Sayekti; Ramelan, Ari Handono; Prasetyawati, L; Saputri, L N M Z; Ichsan, S; Kristiawan, Y R

doi:10.1088/1757-899x/333/1/012033

Cited by 3 publications

(3 citation statements)

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“…Another observation made during the experiments is the apparent phase change that Fe 3 O 4 underwent during mixing with PEEK at 380 C. The dark grey/black color of the Fe 3 O 4 particles before mixing became a brown color, similar to rust. This reveals the possible presence of maghemite (γ-Fe 3 O 2 ), which is an intermediate state in the transformation from Fe 3 O 4 to hematite (Fe 3 O 2 ) that appears at temperatures around 300-400 C. [39] The complete transformation into Fe 3 O 2 occurs at higher temperature (around 600 C). γ-Fe 3 O 2 has the same atomic structure as Fe 3 O 2 but remains in the same crystalline structure as Fe 3 O 4 , which gives somewhat similar magnetic properties.…”

Section: Discussionmentioning

confidence: 93%

“…This reveals the possible presence of maghemite (γ‐Fe 3 O 2 ), which is an intermediate state in the transformation from Fe 3 O 4 to hematite (Fe 3 O 2 ) that appears at temperatures around 300–400 °C. [ 39 ] The complete transformation into Fe 3 O 2 occurs at higher temperature (around 600 °C). γ‐Fe 3 O 2 has the same atomic structure as Fe 3 O 2 but remains in the same crystalline structure as Fe 3 O 4 , which gives somewhat similar magnetic properties.…”

Section: Discussionmentioning

confidence: 99%

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Material Selection Methodology for an Induction Welding Magnetic Susceptor Based on Hysteresis Losses

et al. 2021

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Section: Discussionmentioning

confidence: 93%

Section: Discussionmentioning

confidence: 99%

Material Selection Methodology for an Induction Welding Magnetic Susceptor Based on Hysteresis Losses

et al. 2021

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“…These groups are possibly believed to influence the phase formation as well as in phase stabilization of all the nanocomposites [23][24][25] . The peak observed at460 cm −1 corresponding to Ti-O bond of TiO 2 , was found to be shifted to 525 cm −1 after the incorporation with Fe 2 O 3 where Fe-O stretching mode was clearly observed in the spectra.…”

Section: Resultsmentioning

confidence: 99%

Enhanced photocatalytic and electrochemical performance of TiO2-Fe2O3 nanocomposite: Its applications in dye decolorization and as supercapacitors

Kumar¹,

Abebe

Nagaswarupa

et al. 2020

Sci Rep

110

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this work reveals a green combustion route for the synthesis of tio 2 , fe 2 o 3 and tio 2 -fe 2 o 3 nanocomposites as photocatalysts for decolorization of titan Yellow (tY) and Methyl orange (Mo) dyes at room temperature in aqueous solution concentration of 20 ppm under UV-light irradiation. We observed that the tio 2 -fe 2 o 3 nanocomposite shows superior photocatalytic activity for tY dye compared to pure tio 2 and fe 2 o 3 . Rate constant (k) values of tio 2 , fe 2 o 3 and tio 2 -fe 2 o 3 for tY and Mo are 0.0194, 0.0159, 0.04396 and 0.00931, 0.00772 0.0119 kmin −1 respectively. the surface area and pore volume of tio 2 -fe 2 o 3 nanocomposite were found to be 71.56 m 2 /g and 0.076 cm 3 /g, respectively as revealed by Bet studies. from the Barrett-Joyner-Halenda (BJH) plot, the mean pore diameter of tio 2fe 2 o 3 nanoparticles was found to be 2.43 nm. Further, the TiO 2 -fe 2 o 3 nanocomposite showed good electrochemical behavior as an electrode material for supercapacitors when compared to pure tio 2 and fe 2 o 3 nanoparticles resulted in stable electrochemical performance with nearly 100% coulombic efficiency at a scan rate of 10 mV/s for 1000 cycles. Interestingly, the novelty of this work is that the designed supercapacitors showed stable electrochemical performance even at 1000 th cycle, which might be useful for rechargeable supercapacitor applications. the electrochemical properties of the nanocomposites were compared by the data obtained by cyclic voltammograms, charge-discharge tests and electrochemical impedance spectroscopic studies. these results demonstrated that the tio 2fe 2 o 3 nanocomposite showed stable performance compared to tio 2 and fe 2 o 3 nanoparticles at current density of 5 Ag −1 .Recently electrochemical studies have gained significant attention due to energy and environment related issues. Since the discovery of TiO 2 and its applications as photo-anode for battery, splitting of water, supercapacitor, dye removal etc 1 ., many different metal oxides and electrodes have been explored to enhance the energy conversion efficiency. Amongst a variety of semiconductor metal oxides, hematite (α-Fe 2 O 3 ) was found to be a good anode material for supercapacitor application, which could be attributed to its high solar-to-hydrogen efficiency, encouraging optical band gap (~2 eV), outstanding chemical strength as well as ease of availability in the nature. However, α-Fe 2 O 3 exhibits low experimental performance compared with the theoretical values, which is possibly due to poor conducting and oxygen evolution properties in addition to short whole diffusion length. To overcome these problems, various synthetic methods have been tried in the recent past, to improve the experimental performance of α-Fe 2 O 3 .But, solution-based combustion method is a simple, low cost, energy saving, easy to control the surface morphology and particle size 2 . In addition, the materials prepared in this method are organic solvent free as we used water as solvent 3-5 .

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Synthesis and Characterization of Ti–Fe Oxide Nanomaterials: Adsorption–Degradation of Methyl Orange Dye

2020

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The Influence of Fe₂O₃ Addition on the Tio₂ Structure and Photoactivity Properties

Cited by 3 publications

References 5 publications

Material Selection Methodology for an Induction Welding Magnetic Susceptor Based on Hysteresis Losses

Material Selection Methodology for an Induction Welding Magnetic Susceptor Based on Hysteresis Losses

Enhanced photocatalytic and electrochemical performance of TiO2-Fe2O3 nanocomposite: Its applications in dye decolorization and as supercapacitors

Synthesis and Characterization of Ti–Fe Oxide Nanomaterials: Adsorption–Degradation of Methyl Orange Dye

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