Photophysical and photocatalytic water splitting performance of stibiotantalite type-structure compounds, SbMO4 (M = Nb, Ta)

Kim, Sang Hyeon; Park, Sangbaek; Lee, Chan Woo; Han, Byung Suh; Seo, Se Won; Kim, Ju Seong; Cho, In Sun; Hong, Kug Sun

doi:10.1016/j.ijhydene.2012.08.123

Cited by 28 publications

(14 citation statements)

References 40 publications

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“…This fundamental unit has been reported to contribute to the formation of the CB, which was shown recently in work by Kim et al (2012) LiTaO 3 resulted in distortion (Kato and Kudo, 2003). These observations by Kim et al and Kato and Kudo were found to impact photocatalytic activity.…”

Section: Tantalatesmentioning

confidence: 60%

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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Section: Tantalatesmentioning

confidence: 60%

Photocatalytic Splitting of Water

Skillen

McCullagh

Adams

2014

Environmental Photochemistry Part III

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“…The Sb 3+ ions are surrounded by six oxygen atoms, forming strongly distorted SbO 6 [9]. It is known that SbNbO 4 is a ferroelectric in the temperature range from ≈ 400 to ≈ 600…”

Section: +mentioning

confidence: 99%

“…• C [5] and that it shows photocatalytic activities for H 2 evolution from water splitting [9]. For this reason it has been a subject of great interest.…”

Section: +mentioning

confidence: 99%

“…According to the authors of [9] this compound can be obtained also by the solid state reaction when a mixture Sb 2 O 3 /Nb 2 O 5 is heated in argon atmosphere at 900…”

Section: Introductionmentioning

confidence: 99%

“…The structure of the compound SbNbO 4 has been determined [69] and its physicochemical properties (including electric, magnetic, optical and photocatalytic ones) have been established [46,9]. According to the updated results [9] it crystallises in the orthorhombic * corresponding author; e-mail: piotrdulian@indy.chemia.pk.edu.pl system (a = 5.568 Å, b = 11.811 Å, c = 4.938 Å) and has a lamellar structure. Nb ions are octahedrally coordinated with the oxygen atoms to build NbO 6 octahedra.…”

Section: Introductionmentioning

confidence: 99%

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Comparative Study of Phases Forming in Niobium-Antimony Oxides System upon High Temperature Treatment and High-Energy Ball Milling

et al. 2014

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The compound SbNbO4 that is formed in a ternary system of NbSbO has been obtained for the rst time by high-energy ball milling of the equimolar mixture of oxides Sb2O3/Nb2O5in argon atmosphere. This compound was characterised by X-ray diraction, dierential thermal analysis-thermal gravimetry, infrared, and scanning electron microscopy methods and its properties were compared with those of SbNbO4 also obtained as a result of high-temperature reaction between the same oxides and also in argon atmosphere. As shown by dierential thermal analysis results, irrespective of the method of synthesis, SbNbO4 is stable in argon atmosphere up to ≈ 1125• C and in air up to ≈ 800• C. The compound can be applied as a photocatalyst in the reaction of producing hydrogen from water.

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Recent Progress in the Development of Semiconductor‐Based Photocatalyst Materials for Applications in Photocatalytic Water Splitting and Degradation of Pollutants

Opoku

Govender

Sittert

et al. 2017

Advanced Sustainable Systems

187

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Photocatalytic approaches in the visible region show promising potential in photocatalytic water splitting and water treatment to boost water purification efficiency. For this reason, developing cost‐effective and efficient photocatalysts for environmental remediation is a growing need, and semiconductor photocatalysts have now received more interest owing to their excellent activity and stability. Recently, several metal oxides, sulfides, and nitrides‐based semiconductors for water splitting and photodegradation of pollutants have been developed. However, the existing challenges, such as high over potential, wide band gap as well as fast recombination of charge carriers of most of the semiconductors limit their photocatalytic properties. This review summarizes the recent state‐of‐the‐art first‐principles research progress in the design of effective visible‐light‐response semiconductor photocatalysts through several modification processes with a focus on density functional theory (DFT) calculations. Recent developments to the exchange‐correlation effect, such as hybrid functionals, DFT + U as well as methods beyond DFT are also emphasized. Recent discoveries on the origin, fundamentals, and the underlying mechanisms of the interfacial electron transfer, band gap reduction, enhanced optical absorption, and electron–holes separation are presented. Highlights on the challenges and proposed strategies in developing advanced semiconductor photocatalysts for the application in water splitting and degradation of pollutants are proposed.

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Photophysical and photocatalytic water splitting performance of stibiotantalite type-structure compounds, SbMO4 (M = Nb, Ta)

Cited by 28 publications

References 40 publications

Photocatalytic Splitting of Water

Photocatalytic Splitting of Water

Comparative Study of Phases Forming in Niobium-Antimony Oxides System upon High Temperature Treatment and High-Energy Ball Milling

Recent Progress in the Development of Semiconductor‐Based Photocatalyst Materials for Applications in Photocatalytic Water Splitting and Degradation of Pollutants

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