Sunlight active photocatalytic studies of Fe2O3 based nanocomposites developed via two-pot synthesis technique

Venkatachalam, Archana; Abel, M. John; Deivatamil, D.; Revathi, J.; Jesuraj, Joseph Prince

doi:10.1016/j.inoche.2020.108417

Cited by 6 publications

(2 citation statements)

References 41 publications

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“…As shown in Figure 4F, the PL peak at approximately 474 nm is attributed to electron transfer from the deep donor to the valence band and from the conduction band edge to the deep acceptor. Whereas the PL peak observed at approximately 564 nm indicates radiative recombination of electrons from the shallow donor with trapped holes from defects 44 . The intensity of this peak is inversely proportional to charge separation efficiency, with higher PL intensity indicating a higher rate of photogenerated electron‐hole recombination.…”

Section: Resultsmentioning

confidence: 99%

“…Whereas the PL peak observed at approximately 564 nm indicates radiative recombination of electrons from the shallow donor with trapped holes from defects. 44 The intensity of this peak is inversely proportional to charge separation efficiency, with higher PL intensity indicating a higher rate of photogenerated electron-hole recombination. After IrO x loading, the PL intensity was significantly reduced by nearly half, due to the formation of a nanojunction between Ti-Fe 2 O 3 and IrO x , confirming the promoted charge separation and transfer.…”

Section: Pec Performancementioning

confidence: 99%

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Unlocking the potential of hematite photoanodes in acidic electrolytes: Boosting performance with ultra‐small IrO_x nanoparticles for efficient water splitting

Yuan,

Li,

Cui

et al. 2024

EcoEnergy

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Photoelectrochemical (PEC) water splitting offers a promising route for harnessing solar energy to produce clean hydrogen fuel sustainably. A major hurdle has been boosting the performance of photoanode materials within acidic electrolytes—a critical aspect for advancing PEC technology. In response to this challenge, we report a method to augment the efficacy of hematite photoanodes under acidic conditions by anchoring IrOx nanoparticles, replete with hydroxyl groups, onto their surface. A remarkable and steady photocurrent density of 1.71 mA cm−2 at 1.23 V versus RHE was achieved, marking a significant leap in PEC efficiency of hematite in acidic media. The introduction of the IrOx layer notably expanded the electrochemically active surface area for more active sites, fostering improved charge separation and transfer. It also served as an effective hole capture layer, drawing photogenerated holes from hematite to facilitate swift migration to the active sites for the water oxidation process. This advancement has the potential to fully harness the capabilities of hematite photoanodes in acidic environments, thereby smoothing the path toward more effective and sustainable hydrogen production through PEC water splitting.

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Section: Resultsmentioning

confidence: 99%

Section: Pec Performancementioning

confidence: 99%

Unlocking the potential of hematite photoanodes in acidic electrolytes: Boosting performance with ultra‐small IrO_x nanoparticles for efficient water splitting

Yuan,

Li,

Cui

et al. 2024

EcoEnergy

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Physicochemical and photocatalytic properties of Ag₂CrO₄/Fe₂O₃/CeO₂ ternary nanocomposite

Ananthkumar,

Jayaprakash,

Debnath

et al. 2024

Luminescence

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The study presents Ag2CrO4/Fe2O3/CeO2 ternary nanocomposite, based on Fe2O3/CeO2 binary composites, which demonstrated excellent photocatalytic performance in the photodegradation of methylene blue under solar irradiation. The Ag2CrO4/Fe2O3/CeO2 nanocomposites was orthorhombic, ilmenite, and cubic‐fluorite phases of Ag2CrO4, Fe2O3, and CeO2, respectively, according to the XRD examination. A strong bond between Ag2CrO4, Fe2O3, and CeO2 within the nanocomposite was demonstrated by the SEM and TEM investigations. Moreover, it was discovered that the coupling of Ag2CrO4 and Fe2O3 caused a red shift and moved CeO2 absorption edge from the UV to the visible spectrum. The reason behind this is that the band gap of CeO2 reduced 2.85 to 2.69 eV and the absorbance band intensity increased in visible region. Utilizing visible light, Ag2CrO4/Fe2O3/CeO2 ternary nanocomposites exhibit enhanced photocatalytic properties (98.90%) for the degradation of methylene blue (MB) within 100 min. The long‐term reliability and recyclability of the photocatalyst were explored through 3 successive cycles. An active radical quenching test was conducted to elucidate the involvement of O2− and OH which are the primary reactive species in the photocatalytic breakdown of MB. Ag2CrO4/Fe2O3/CeO2 ternary nanocomposites displayed notable improvements in photodegradation activity, making them well suited for the effective removal of hazardous dyes present in textile effluents.

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Enhanced photocatalytic activity of α-Mn2O3@SiO2 core shell nanocomposites against methylene blue and rhodamine B dyes

Divya,

Lims,

Britto Dhas

et al. 2024

Appl. Phys. A

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Sunlight active photocatalytic studies of Fe2O3 based nanocomposites developed via two-pot synthesis technique

Cited by 6 publications

References 41 publications

Unlocking the potential of hematite photoanodes in acidic electrolytes: Boosting performance with ultra‐small IrO_x nanoparticles for efficient water splitting

Unlocking the potential of hematite photoanodes in acidic electrolytes: Boosting performance with ultra‐small IrO_x nanoparticles for efficient water splitting

Physicochemical and photocatalytic properties of Ag₂CrO₄/Fe₂O₃/CeO₂ ternary nanocomposite

Enhanced photocatalytic activity of α-Mn2O3@SiO2 core shell nanocomposites against methylene blue and rhodamine B dyes

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Sunlight active photocatalytic studies of Fe2O3 based nanocomposites developed via two-pot synthesis technique

Cited by 6 publications

References 41 publications

Unlocking the potential of hematite photoanodes in acidic electrolytes: Boosting performance with ultra‐small IrOx nanoparticles for efficient water splitting

Unlocking the potential of hematite photoanodes in acidic electrolytes: Boosting performance with ultra‐small IrOx nanoparticles for efficient water splitting

Physicochemical and photocatalytic properties of Ag2CrO4/Fe2O3/CeO2 ternary nanocomposite

Enhanced photocatalytic activity of α-Mn2O3@SiO2 core shell nanocomposites against methylene blue and rhodamine B dyes

Contact Info

Product

Resources

About

Unlocking the potential of hematite photoanodes in acidic electrolytes: Boosting performance with ultra‐small IrO_x nanoparticles for efficient water splitting

Unlocking the potential of hematite photoanodes in acidic electrolytes: Boosting performance with ultra‐small IrO_x nanoparticles for efficient water splitting

Physicochemical and photocatalytic properties of Ag₂CrO₄/Fe₂O₃/CeO₂ ternary nanocomposite