Nickel-loaded K4Nb6O17 photocatalyst in the decomposition of H2O into H2 and O2: Structure and reaction mechanism

Kudo, Akihiko; Sayama, Kazuhiro; Tanaka, Akira; Asakura, Kiyotaka; Domen, Kazunari; Maruya, Ken‐ichi; Onishi, Takaharu

doi:10.1016/0021-9517(89)90274-1

Cited by 282 publications

(170 citation statements)

References 11 publications

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“…[39] In the development of new photocatalysts, many candidates with higher photocatalytic activities than TiO 2 have been studied, most featuring wide bandgaps and only active under UV lights. [40] For higher efficiencies, visible light absorbing photocatalysts have been pursued in parallel. [41] In the meanwhile, researchers gradually learned more about the principles that govern photocatalysis, which will be discussed later in this review (Sections 5, 6, and 7).…”

Section: History Of Photocatalysismentioning

confidence: 99%

Photocatalysis: Basic Principles, Diverse Forms of Implementations and Emerging Scientific Opportunities

Zhu

Wang

2017

Advanced Energy Materials

595

298

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Photocatalysis promises a solution to challenges associated with the intermittent nature of sunlight which is considered as renewable and ultimate energy source to power activities on Earth. This review aims to provide a broad overview of the field. Insight into natural photosynthesis is discussed first, which provides a scientific basis for most efforts on photocatalysis. Afterwards, the details of four existing types of photocatalysis are presented, namely photosynthesis by plants, photosynthesis by microalgae, photocatalysis by suspension and photoelectrocatalysis. Detailed analyses of simple photocatalysts and integrated photocatalytic systems are followed to shed light on the different functionalities of different components in a working photocatalyst. Special attention is given to the roles played by surface and interface chemical phenomena. Lastly, perspectives on artificial photosynthesis are discussed briefly at the end.

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Section: History Of Photocatalysismentioning

confidence: 99%

Photocatalysis: Basic Principles, Diverse Forms of Implementations and Emerging Scientific Opportunities

Zhu

Wang

2017

Advanced Energy Materials

595

298

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“…Moreover, isostructural layered oxides Li 2 La 2 Ti 3 O 10 and Na 2 La 2 Ti 3 O 10 , which do not intercalate water at ambient conditions, show very low efficiency in the reaction of hydrogen production under UV light [10,11]. Thus, the photocatalytic activity of triple-layered titanates A 2 La 2 Ti 3 O 10 is likely to be connected with their intercalation ability, which is also the case for some other layered oxides [12,13].…”

Section: Introductionmentioning

confidence: 99%

Protonation and Photocatalytic Activity of the Rb₂La₂Ti₃O₁₀ Layered Oxide in the Reaction of Hydrogen Production

Rodionov

Sokolova

Silyukov

et al. 2017

International Journal of Photoenergy

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The Rb 2 La 2 Ti 3 O 10 layered oxide was synthesized by the solid-state method. Three phases with different protonation degrees and intercalated water contents were obtained from the initial compound by the treatment with distilled water and hydrochloric acid. The obtained samples were characterized by powder X-ray diffraction, SEM, X-ray microanalysis, BET, DRS, and TG. It was found that the complete ion exchange of Rb + for H + in the layered oxide Rb 2 La 2 Ti 3 O 10 proceeds through the formation of two metastable intermediate phases with average protonation degrees of 0.5 and 0.75, which successively transform from one to another. Each of these phase transformations is accompanied not only by the contraction of the interlayer distance but also by the displacement of adjacent perovskite layers by 1/2 of the cell parameter which results in the change in the space group. The photocatalytic activity of obtained samples decreases with the increase in the protonation degree, which correlates with the decrease in the intercalated water content.

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“…Moreover, the activity can be doubled if 13 and found that these materials were active for photocatalytic H 2 evolution from aqueous methanol solutions [20]. Besides the extensive investigation on Ti-based ion-exchangeable semiconductor materials, a large number of Nb and Ta developed for photocatalytic reactions [21][22][23][24][25][26][27][28][29][30].…”

Section: Ion-exchangeable Semiconductor Materialsmentioning

confidence: 99%

Ion-exchangeable semiconductor materials for visible light-induced photocatalysis

Zong

Wang

2014

Journal of Photochemistry and Photobiology C: Photochemistry Re

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Abstract:The use of semiconductor materials for solar fuel production and environmental remediation has attracted increasing attention in the past decades due to their potential to address important energy and environmental problems.Ion-exchangeable semiconductor materials represent one family of promising materials due to their unique crystal structures and structure-related photocatalytic activity.However, most of the ion-exchangeable semiconductor materials can only absorb UV light due to their wide band-gap. To efficiently utilize solar energy, it is dispensable to develop visible light-responsive semiconductor materials which can absorb solar electromagnetic irradiation accounting for almost half of the solar energy reaching the Earth's surface. In this review article, we summarize the recent advances on ion-exchangeable semiconductor materials as visible light-responsive photocatalysts with particular focus on the band-gap engineering strategies and their photocatalytic applications.

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Nickel-loaded K4Nb6O17 photocatalyst in the decomposition of H2O into H2 and O2: Structure and reaction mechanism

Cited by 282 publications

References 11 publications

Photocatalysis: Basic Principles, Diverse Forms of Implementations and Emerging Scientific Opportunities

Photocatalysis: Basic Principles, Diverse Forms of Implementations and Emerging Scientific Opportunities

Protonation and Photocatalytic Activity of the Rb₂La₂Ti₃O₁₀ Layered Oxide in the Reaction of Hydrogen Production

Ion-exchangeable semiconductor materials for visible light-induced photocatalysis

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Nickel-loaded K4Nb6O17 photocatalyst in the decomposition of H2O into H2 and O2: Structure and reaction mechanism

Cited by 282 publications

References 11 publications

Photocatalysis: Basic Principles, Diverse Forms of Implementations and Emerging Scientific Opportunities

Photocatalysis: Basic Principles, Diverse Forms of Implementations and Emerging Scientific Opportunities

Protonation and Photocatalytic Activity of the Rb2La2Ti3O10 Layered Oxide in the Reaction of Hydrogen Production

Ion-exchangeable semiconductor materials for visible light-induced photocatalysis

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Protonation and Photocatalytic Activity of the Rb₂La₂Ti₃O₁₀ Layered Oxide in the Reaction of Hydrogen Production