Photocatalytic oxygen evolution on α-Fe2O3 films using Fe3+ ion as a sacrificial oxidizing agent

Ohmori, Takashi; Takahashi, Hideya; Mametsuka, Hiroaki; Suzuki, Eiji

doi:10.1039/b003977m

Cited by 142 publications

(80 citation statements)

References 16 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The stability and semiconductor (n-type) properties of α-Fe 2 O 3 allow it to be used as a photocatalyst [9]. Currently the α-Fe 2 O 3 photoelectrode has received considerable attention as a solar energy conversion material due to its excellent properties, such as a small band gap (2.1 eV), high resistivity to corrosion and low cost [10] and we already reported its cancer cell killing potentiality [11].…”

mentioning

confidence: 99%

Hydrothermal Novel Synthesis of Neck-structured Hyperthermia-suitable Magnetic (Fe3O4, γ-Fe2O3 and α-Fe2O3) Nanoparticles

et al. 2011

View full text Add to dashboard Cite

Novel neck-structured Fe3O4, γ-Fe2O3 and α-Fe2O3 magnetic nanoparticles were successfully prepared by a modified hydrothermal method. Ferrous chloride tetrahydrate was solely used as a precursor for the novel nanomaterials. The X-ray diffractometric study revealed the purity of the nanomaterials thus synthesized. All of the products were characterized using a field-emission scanning electron microscope (FE-SEM) and a transmission electron microscope (TEM) for the particle size and morphology. Neck-structured particle morphology was observed for the first time in all of iron oxides with magnetic properties. The particle size observed was 50–60 nm. The synthesized nanomaterials showed excellent magnetization values when magnetic hysteresis loops were measured using a superconducting quantum interference device (SQUID). Moreover, the as-prepared magnetic nanoparticles suspensions showed significant temperature increments under an AC (alternating current) magnetic-field induction condition at room temperature which indicates the hyperthermia feasibility. Keywords: Magnetic materials; Neck-structured; Hyperthermia; Heat dissipation. © 2012 JSR Publications. ISSN: 2070-0237 (Print); 2070-0245 (Online). All rights reserved. doi: http://dx.doi.org/10.3329/jsr.v4i1.8727J. Sci. Res. 4 (1), 99-107 (2012)

show abstract

mentioning

confidence: 99%

Hydrothermal Novel Synthesis of Neck-structured Hyperthermia-suitable Magnetic (Fe3O4, γ-Fe2O3 and α-Fe2O3) Nanoparticles

et al. 2011

View full text Add to dashboard Cite

show abstract

“…Even though no exact count exists here, it seems fair to say that Ag + is employed in at least 95 % of the published papers dealing with the sacrificial photocatalytic water oxidation. In some cases, it could be shown that molecular oxygen is also formed when ferric ions are employed as sacrificial electron acceptors [138]:…”

Section: The Role Of Sacrificial Electron Acceptorsmentioning

confidence: 99%

Solar Photocatalytic Hydrogen Production: Current Status and Future Challenges

Schneider

Kandiel

Bahnemann

2014

Materials and Processes for Solar Fuel Production

View full text Add to dashboard Cite

Due to the increase of the worldwide demand for energy along with the global warming and the increasing level of atmospheric CO 2 , solar hydrogen has been proposed as an optimal fuel as it can be produced from water using solar energy which emerges as the most promising energy source in terms of abundance and sustainability. So far, the main commercial process for producing molecular hydrogen is steam reforming of hydrocarbons which is, however, connected with a CO 2 emission disadvantage. Carbon-free hydrogen production can be achieved by water splitting employing an electrolyzer powered by photovoltaics, but a potentially more cost-effective route is to perform direct photocatalytic water splitting using semiconductor photocatalysts. Herein, the authors present the principles of this process, the maximum solar-to-hydrogen conversion efficiency, the most active photocatalysts reported so far and the challenges for the development of the optimum photocatalyst for the efficient release of hydrogen from water. Since the efficiency of the overall photocatalytic water splitting is still very low and the photocatalytic reforming of biomass compounds can be considered as an intermediate step between the current fossil fuel consumption and the dream for an efficient direct photocatalytic water splitting utilizing solar energy, the photocatalytic hydrogen production employing different so-called sacrificial reagents, i.e., electron donors, is also presented and discussed herein. Commonly, the system employing TiO 2 as the photocatalyst and methanol as the sacrificial reagent is investigated, thus, details concerning the possibility of enhancing the photocatalytic activity of this system as well as the current knowledge of the underlying mechanism are presented at the end of this chapter.

show abstract

“…The use of α-Fe 2 O 3 has been demonstrated as a photoanode for photoassisted electrolysis of water, [1] an active component of gas sensors, [2 -5] a photocatalyst [6] and an ordinary catalyst. [7 -9] Because of its excellent properties, considerable efforts have been focused on the properties and synthesis of hematite nanomaterials with controllable size and shape, such as nanocrystals, [10] nanoparticles, [11] nanocubes, [12] nanospindles, [13] nanoflakes, [14] nanorods, [15] nanowires, [16] nanobelts [17] and nanotubes.…”

Section: Introductionmentioning

confidence: 99%

Self‐assembled three‐dimensional flower‐like α‐Fe₂O₃ nanostructures and their application in catalysis

Zhang

Chen

Wang

et al. 2009

Applied Organom Chemis

View full text Add to dashboard Cite

Three-dimensional flower-like α-Fe 2 O 3 nanostructures have been successfully synthesized by a simple surfactant-free environmental friendly solvolthermal process. The as-prepared products were investigated by X-ray powder diffraction, transmission electron microscopy, and field emission scanning electron microscopy. By adjusting the synthetic parameters, the shape of the α-Fe 2 O 3 nanostructures can be controlled. The three-dimensional flower-like α-Fe 2 O 3 nanostructures were found to be highly active as catalysts for phenol alkylation. The effects of various parameters, such as reaction temperature, reaction time and the amount of catalyst, were studied. The catalyst was stable and could be reused three times in normal atmosphere without suffering appreciable loss in catalytic activity.

show abstract

Photocatalytic oxygen evolution on α-Fe2O3 films using Fe3+ ion as a sacrificial oxidizing agent

Cited by 142 publications

References 16 publications

Hydrothermal Novel Synthesis of Neck-structured Hyperthermia-suitable Magnetic (Fe<sub>3</sub>O<sub>4</sub>, γ-Fe<sub>2</sub>O<sub>3</sub> and α-Fe<sub>2</sub>O<sub>3</sub>) Nanoparticles

Hydrothermal Novel Synthesis of Neck-structured Hyperthermia-suitable Magnetic (Fe<sub>3</sub>O<sub>4</sub>, γ-Fe<sub>2</sub>O<sub>3</sub> and α-Fe<sub>2</sub>O<sub>3</sub>) Nanoparticles

Solar Photocatalytic Hydrogen Production: Current Status and Future Challenges

Self‐assembled three‐dimensional flower‐like α‐Fe₂O₃ nanostructures and their application in catalysis

Contact Info

Product

Resources

About

Photocatalytic oxygen evolution on α-Fe2O3 films using Fe3+ ion as a sacrificial oxidizing agent

Cited by 142 publications

References 16 publications

Hydrothermal Novel Synthesis of Neck-structured Hyperthermia-suitable Magnetic (Fe<sub>3</sub>O<sub>4</sub>, &gamma;-Fe<sub>2</sub>O<sub>3</sub> and &alpha;-Fe<sub>2</sub>O<sub>3</sub>) Nanoparticles

Hydrothermal Novel Synthesis of Neck-structured Hyperthermia-suitable Magnetic (Fe<sub>3</sub>O<sub>4</sub>, &gamma;-Fe<sub>2</sub>O<sub>3</sub> and &alpha;-Fe<sub>2</sub>O<sub>3</sub>) Nanoparticles

Solar Photocatalytic Hydrogen Production: Current Status and Future Challenges

Self‐assembled three‐dimensional flower‐like α‐Fe2O3 nanostructures and their application in catalysis

Contact Info

Product

Resources

About

Hydrothermal Novel Synthesis of Neck-structured Hyperthermia-suitable Magnetic (Fe<sub>3</sub>O<sub>4</sub>, γ-Fe<sub>2</sub>O<sub>3</sub> and α-Fe<sub>2</sub>O<sub>3</sub>) Nanoparticles

Hydrothermal Novel Synthesis of Neck-structured Hyperthermia-suitable Magnetic (Fe<sub>3</sub>O<sub>4</sub>, γ-Fe<sub>2</sub>O<sub>3</sub> and α-Fe<sub>2</sub>O<sub>3</sub>) Nanoparticles

Self‐assembled three‐dimensional flower‐like α‐Fe₂O₃ nanostructures and their application in catalysis