The effect of co-catalyst for Z-scheme photocatalysis systems with an Fe3+/Fe2+ electron mediator on overall water splitting under visible light irradiation

Sasaki, Yasuyoshi; Iwase, Akihide; Kato, Hideki; Kudo, Akihiko

doi:10.1016/j.jcat.2008.07.017

Cited by 390 publications

(312 citation statements)

References 29 publications

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“…2 In this sense, bismuth vanadate has been found to be a promising candidate used for organic contaminants decomposition as well as in CO 2 reduction under visible-light irradiation. [3][4][5][6][7] BiVO 4 appears in three main crystalline phases: monoclinic, tetragonal zircon, and tetragonal scheelite. Among the above three crystal phases, monoclinic BiVO 4 (m-BiVO 4 ) is the best visible-light-driven photocatalyst due to its lower band gap value (ca.…”

Section: Introductionmentioning

confidence: 99%

Exalted photocatalytic activity of tetragonal BiVO₄by Er³⁺doping through a luminescence cooperative mechanism

2014

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Er-doped BiVO 4 are synthesized by means of a surfactant free microwave assisted hydrothermal method having good photoactivities under sun-like excitation for the degradation of methylene blue. From the structural and morphological characterization, it has been stated that the presence of Er 3+ induces a slight stabilization of the tetragonal phase, probably due to its incorporation in the BiVO 4 lattice. The best photocatalytic performances were attained for the samples with Er 3+ content higher than 3 at%. The occurrence of the Er 3+ doped tetragonal BiVO 4 clearly induces higher photocatalytic activities. The existence of a luminescence process has been related with the enhanced photoactivity observed.

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Section: Introductionmentioning

confidence: 99%

Exalted photocatalytic activity of tetragonal BiVO₄by Er³⁺doping through a luminescence cooperative mechanism

2014

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“…Unfortunately, very few materials have been found to be able to carry out the whole water splitting procedure and even less can do that under visible, instead of UV, light 2,3 . Successful 35 water splitting under visible light is often achieved by the production of a Z-scheme [4][5][6][7][8] , which is a system consisting of two photocatalysts, connected by a redox couple (e.g. Fe 3+ / Fe 2+ ), one photocatalyst produces H 2 and the other produces O 2 .…”

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confidence: 99%

An investigation of crystal structure, surface area and surface chemistry of strontium niobate and their influence on photocatalytic performance

Efstathiou

Ménard

et al. 2013

Dalton Trans.

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Sr 1-x NbO 3 is an unusual material that displays both metallic type conduction and photocatalytic activity, despite it being a NbIV oxide, it sustains photo-oxidation without degradation.1 The influence of crystal structure, surface area and surface chemistry on the photocatalytic activity of strontium niobate 15 has been investigated. The crystal structure of strontium niobate depends on the Sr content of the A site, with cubic symmetry for Sr ≤ 0.92 and orthorhombic symmetric for 0.92 ˂ Sr ≤ 0.97. The change of crystal structure from cubic to orthorhombic symmetry seems to have a negative effect on the photocatalytic activity, as the NbO 6 octahedra become distorted and unfavourable for d-orbital overlapping. The photocatalytic activity increased significantly by enlarging the surface area through ball 20 milling, nevertheless, a clear trend for surface area effect on activity is not obtained among samples with different Sr content. An enrichment of Sr on the surface of strontium niobate was observed by XPS, which seems to be a governing factor improving stability.

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“…H 2 evolution on the Pt/SrTiO3:Rh photocatalyst was enhanced rather than suppressed by the presence of Fe 3+ (Sasaki et al 2008 (Sasaki et al 2008).…”

Section: Z-scheme Photocatalystsmentioning

confidence: 93%

“…The presence of the Pt co-catalyst mainly serves to provide reduction sites that enable the 6 electron reduction of IO 3 -to I -. (Kato et al 2007;Sasaki et al 2008;Ohno et al 1997). Previous studies had demonstrated the functionality of using Fe 3+ ions as efficient electron acceptors over a RuO 2 /WO 3 or rutile TiO 2 photocatalyst for O 2 evolution Konta et al 2004).…”

Section: Z-scheme Photocatalystsmentioning

confidence: 99%

Photocatalytic Splitting of Water

Skillen

McCullagh

Adams

2014

Environmental Photochemistry Part III

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The final publication is available at Springer via http://dx.doi.org/10.1007/698_2014_261 AbstractThe use of photocatalysis for the photosplitting of water to generate hydrogen and oxygen has gained interest as a method for the conversion and storage of solar energy. The application of photocatalysis through catalyst engineering, mechanistic studies and photoreactor development has highlighted the potential of this technology, with the number of publications significantly increasing in the past few decades. In 1972 Fujishima and Honda described a photoelectrochemcial system capable of generating H 2 and O 2 using thin film TiO 2 . Since this publication, a diverse range of catalysts and platforms have been deployed, along with a varying range of photoreactors coupled with photoelectrochemical and photovoltaic technology. This chapter aims to provide a comprehensive overview of photocatalytic technology applied to overall H 2 O splitting. An insight into the electronic and geometric structure of catalysts is given based upon the one and two step photocatalyst systems.One step photocatalysts are discussed based upon their d 0 and d 10 electron configuration and core metal ion including transition metal oxides, typical metal oxides and metal nitrides. The two step approach, referred to as the Z-scheme, is discussed as an alternative approach to the traditional one step mechanism and the potential of the system utilise visible and solar irradiation. In addition to this the mechanistic procedure of H 2 O splitting is reviewed to provide the reader with a detailed understanding of the process. Finally, the development of photoreactors and reactor properties are discussed with a view towards the photoelectrochemical splitting of H 2 O.

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The effect of co-catalyst for Z-scheme photocatalysis systems with an Fe3+/Fe2+ electron mediator on overall water splitting under visible light irradiation

Cited by 390 publications

References 29 publications

Exalted photocatalytic activity of tetragonal BiVO₄by Er³⁺doping through a luminescence cooperative mechanism

Exalted photocatalytic activity of tetragonal BiVO₄by Er³⁺doping through a luminescence cooperative mechanism

An investigation of crystal structure, surface area and surface chemistry of strontium niobate and their influence on photocatalytic performance

Photocatalytic Splitting of Water

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The effect of co-catalyst for Z-scheme photocatalysis systems with an Fe3+/Fe2+ electron mediator on overall water splitting under visible light irradiation

Cited by 390 publications

References 29 publications

Exalted photocatalytic activity of tetragonal BiVO4by Er3+doping through a luminescence cooperative mechanism

Exalted photocatalytic activity of tetragonal BiVO4by Er3+doping through a luminescence cooperative mechanism

An investigation of crystal structure, surface area and surface chemistry of strontium niobate and their influence on photocatalytic performance

Photocatalytic Splitting of Water

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Exalted photocatalytic activity of tetragonal BiVO₄by Er³⁺doping through a luminescence cooperative mechanism

Exalted photocatalytic activity of tetragonal BiVO₄by Er³⁺doping through a luminescence cooperative mechanism