The impact of nanometric Fe2O3 on the magnetic, electronic, and photocatalytic behavior of TiO2@Fe2O3 heterostructures

Synowiec, Milena; Zákutná, Dominika; Trenczek-Zając, Anita; Radecka, M.

doi:10.1016/j.apsusc.2022.155186

Cited by 17 publications

(2 citation statements)

References 52 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The crystal structures of the x%Fe@KCC-1 (x = 0, 1, 3, 5, 7 and 10) catalysts were characterized by XRD, and the obtained pattern is displayed in Figure S3. For the Fe 2 O 3 catalyst samples, strong diffraction peaks appeared at 24.25 , which corresponded to the (0 1 2), (1 0 4), (1 1 0), (1 1 3), (0 2 4), (1 1 6), (0 1 8), (2 1 4), (3 0 0), and (1 0 10) planes of α-Fe 2 O 3 (JCPDS card: 1-089-0597), respectively [17]. Furthermore, the x%Fe@KCC-1 catalysts showed a broad diffraction peak at 2θ = 22.58, which was attributed to amorphous SiO 2 within the mesoporous molecular sieve of the KCC-1 [18].…”

Section: Basic Morphological Characteristicsmentioning

confidence: 99%

Unraveling FeOx Nanoparticles Confined on Fibrous Mesoporous Silica Catalyst Construction and CO Catalytic Oxidation Performance

Li,

Feng,

Luo

et al. 2024

Catalysts

View full text Add to dashboard Cite

Catalytic oxidation is used to control carbon monoxide (CO) emissions from industrial exhaust. In this study, a mesoporous silica material, KCC-1, was synthesized and used as a carrier with a high specific surface area to confine active component FeOx nanoparticles (NPs), and the CO catalytic oxidation performance of x%Fe@KCC-1 catalysts (x represents the mass loading of Fe) was studied. The experimental results showed that due to its large specific surface area and abundant mesopores, the FeOx NPs were highly dispersed on the surface of the KCC-1 carrier. The particle size of FeOx was very small, resulting in strong interactions between FeOx NPs and KCC-1, which enhanced the catalytic oxidation reaction on the catalyst. The FeOx loading improved the CO adsorption capability of the catalyst, which facilitated the catalytic oxidation of CO, with the 7%Fe@KCC-1 catalyst achieving 100% CO conversion at 160°C. The CO catalytic removal mechanism was investigated by a combination of in-situ DRIFTS and DFT calculations. This study advances scientific understanding of the application potential of nano-catalysts in important oxidation reactions and provides valuable insights into the development of efficient CO oxidation catalysts.

show abstract

Section: Basic Morphological Characteristicsmentioning

confidence: 99%

Unraveling FeOx Nanoparticles Confined on Fibrous Mesoporous Silica Catalyst Construction and CO Catalytic Oxidation Performance

Li,

Feng,

Luo

et al. 2024

Catalysts

View full text Add to dashboard Cite

show abstract

“…They reported that oxygen vacancies improved the photocatalytic activity of anatase TiO 2 in water adsorption. Several experiments have also demonstrated an existence of oxygen defect states in Fe 2 O 3 -TiO 2 and Fe-TiO 2 systems, and the states have been attributed to oxygen vacancies in the TiO 2 lattice [37][38][39][40]. Spectroscopy techniques, such as x-ray photoelectron spectroscopy (XPS), have been used to confirm oxygen vacancy defects in the systems.…”

Section: Introductionmentioning

confidence: 99%

Understanding and optimizing the sensitization of anatase titanium dioxide surface with hematite clusters

Asikainen,

Alatalo,

Huttula

et al. 2024

J. Phys.: Condens. Matter

View full text Add to dashboard Cite

The presence of hematite (Fe2O3) clusters at low coverage on titanium dioxide (TiO2) sur-face has been observed to enhance photocatalytic activity, while excess loading of hematite isdetrimental. We conduct a comprehensive density functional theory study of Fe2O3 clustersadsorbed on the anatase TiO2 (101) surface to investigate the effect of Fe2O3 on TiO2. Ourstudy shows that TiO2 exhibits improved photocatalytic properties with hematite clusters atlow coverage, as evidenced by a systematic study conducted by increasing the number of clusteradsorbates. The adsorption of the clusters generates impurity states in the band gap improvinglight absorption and consequently affecting the charge transfer dynamics. Furthermore, thepresence of hematite clusters enhances the activity of TiO2 in the hydrogen evolution reaction.The Fe valence mixing present in some clusters leads to a significant increase in H2 evolution ratecompared with the fixed +3 valence of Fe in hematite. We also investigate the effect of oxygendefects and find extensive modifications in the electronic properties and local magnetism of theTiO2 -Fe2O3 system, demonstrating the wide-ranging effect of oxygen defects in the combinedsystem.

show abstract

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

Ananthkumar,

Jayaprakash,

Debnath

et al. 2024

Luminescence

View full text Add to dashboard Cite

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.

show abstract

The impact of nanometric Fe2O3 on the magnetic, electronic, and photocatalytic behavior of TiO2@Fe2O3 heterostructures

Cited by 17 publications

References 52 publications

Unraveling FeOx Nanoparticles Confined on Fibrous Mesoporous Silica Catalyst Construction and CO Catalytic Oxidation Performance

Unraveling FeOx Nanoparticles Confined on Fibrous Mesoporous Silica Catalyst Construction and CO Catalytic Oxidation Performance

Understanding and optimizing the sensitization of anatase titanium dioxide surface with hematite clusters

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

Contact Info

Product

Resources

About

The impact of nanometric Fe2O3 on the magnetic, electronic, and photocatalytic behavior of TiO2@Fe2O3 heterostructures

Cited by 17 publications

References 52 publications

Unraveling FeOx Nanoparticles Confined on Fibrous Mesoporous Silica Catalyst Construction and CO Catalytic Oxidation Performance

Unraveling FeOx Nanoparticles Confined on Fibrous Mesoporous Silica Catalyst Construction and CO Catalytic Oxidation Performance

Understanding and optimizing the sensitization of anatase titanium dioxide surface with hematite clusters

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

Contact Info

Product

Resources

About

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