Journal ArticleDOI
Photocatalysis for Water Decomposition by RuO2-Dispersed ZnGa2O4 with d10 Configuration
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TLDR
In this article, the photocatalytic activity for water decomposition of RuO2-dispersed ZnGa2O4 with an octahedrally coordinated Ga3+ ion was studied.Abstract:
The photocatalytic activity for water decomposition of RuO2-dispersed ZnGa2O4 with an octahedrally coordinated Ga3+ ion was studied in order to examine the photocatalytic properties of p-block metal oxides with d10 configuration. ZnGa2O4 was impregnated with Ru3(CO)12 or Ru(C5H7O2)3 in THF and oxidized to convert them to RuO2. For RuO2-loaded ZnGa2O4, hydrogen and oxygen were stably produced from the initial stage of reaction under Hg−Xe lamp light irradiation. The activity dependence on the calcination temperature of ZnGa2O4, the amount of RuO2 loaded, and the oxidation temperature of RuO2 showed that the dispersion of small RuO2 particles leads to high photocatalytic activity. The electronic structure of ZnGa2O4 was calculated by a plane-wave-based density function theory (DFT). The valence bands were mainly composed of the O 2p orbitals, whereas the conduction bands were formed by hybridzation of Ga 4s4p and Zn 4s4p orbitals. Large dispersion observed in the conduction band indicated the large mobility...read more
Citations
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Heterogeneous photocatalyst materials for water splitting
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Inorganic Materials as Catalysts for Photochemical Splitting of Water
TL;DR: A review of the known inorganic catalysts with a focus on structure-activity relationships is given in this article, where the first water splitting system based on TiO2 and Pt was proposed by Fujishima and Honda in 1972.
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Enhancement of photocatalytic H2 evolution on CdS by loading MoS2 as Cocatalyst under visible light irradiation.
TL;DR: This communication presents the recent results that the activity of photocatalytic H2 production can be significantly enhanced when a small amount of MoS2 is loaded on CdS as cocatalyst.
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Engineering heterogeneous semiconductors for solar water splitting
TL;DR: In this paper, a critical review highlights some key factors influencing the efficiency of heterogeneous semiconductors for solar water splitting (i.e. improved charge separation and transfer, promoted optical absorption, optimized band gap position, lowered cost and toxicity, and enhanced stability and water splitting kinetics).
References
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TL;DR: In this article, the authors describe recent technical developments that have made the total-energy pseudopotential the most powerful ab initio quantum-mechanical modeling method presently available, and they aim to heighten awareness of the capabilities of the method in order to stimulate its application to as wide a range of problems in as many scientific disciplines as possible.
Journal ArticleDOI
Water Splitting into H2 and O2 on New Sr2M2O7 (M = Nb and Ta) Photocatalysts with Layered Perovskite Structures: Factors Affecting the Photocatalytic Activity
TL;DR: In this article, the authors used NiO as a cocatalyst for water splitting into H2 and O2 in pure water without any additives under UV irradiation, and found that NiO increased the photocatalytic activity of the NiO(0.15 wt %)/Sr2Ta2O7 photocatalyst.
Journal ArticleDOI
Photocatalytic decomposition of water and photocatalytic reduction of carbon dioxide over zirconia catalyst
K. Sayama,H. Arakawa +1 more
TL;DR: In this article, it was shown that the photocatalytic decomposition of pure water over ZrO[sub 2] powder without any loaded metals under UV irradiation can be achieved without the use of any loaded metal.
Journal ArticleDOI
Role of metal d states in II-VI semiconductors
Su-Huai Wei,Alex Zunger +1 more
TL;DR: In this article, the outermost d electrons were treated on the same footing as other valence electrons and compared with the results obtained by methods which removed the d band from the valence spectrum.
Journal ArticleDOI
Mechanism of photocatalytic decomposition of water into H2 and O2 over NiOSrTiO3
TL;DR: In this paper, the mechanism of photocatalytic decomposition of H2O into H2 and O2 over NiO and SrTiO3 powder was studied on the basis of the structure of the catalyst.
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