A new photocatalytic water splitting system under visible light irradiation mimicking a Z-scheme mechanism in photosynthesis

Sayama, Kazuhiro; Mukasa, Kazuaki; Abe, Ryu; Abe, Yoshimoto; Arakawa, Hironori

doi:10.1016/s1010-6030(02)00070-9

Cited by 362 publications

(109 citation statements)

References 33 publications

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“…Unfortunately, the majority of the photocatalysts are complex and expensive or function only with ultraviolet (UV) irradiation in need of an appropriate electron acceptor or hole scavenger. Although some semiconductors, such as La-doped NaTaO, Ni-doped InTaO 4 and (Ga 1−x Zn x )-(N 1−x O x ) solid solution (or to construct a Z-scheme structure), are employed to realize the overall water-splitting, these catalyst systems still suffer from the low light absorption (<510 nm), poor separation efficiency of electron-hole pairs, and the formidable complexity of the oxidative half-reaction [147][148][149][150][151][152]. Polyoxometalates (POMs), with unique photoelectric chemical properties, are potentially useful for photocatalytic H 2 and O 2 generation [153][154][155][156][157][158].…”

Section: Metal Nanoparticle/cd Complex Photocatalyst For Hydrocarbon mentioning

confidence: 99%

Catalytic Applications of Carbon Dots

Kang

Liu

2016

Carbon Nanostructures

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Carbon materials have been used for a long time in heterogeneous catalysis, which can satisfy most of the desirable properties required for a suitable catalyst support. Based on their significant advantages, such as low cost, huge amount, easy accessibility, high surface area, diverse porous structure, and resistance to acidic or basic environments, the carbon nanostructures are hungered for using as proper catalysts directly. Carbon dots (CDs), a new class of carbon nanomaterials with sizes below 10 nm, were also demonstrated to be efficient catalysts, such as, photocatalysts for selective oxidation, light-driven acid-catalysis and hydrogen bond catalysis. In this chapter, we will highlight the preparative methods, which have been used successfully to produce active, selective and durable CDs catalysts and look at their properties and the reactions which they promote. We then consider the catalysts design based on these new CDs and look into the future.

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Section: Metal Nanoparticle/cd Complex Photocatalyst For Hydrocarbon mentioning

confidence: 99%

Catalytic Applications of Carbon Dots

Kang

Liu

2016

Carbon Nanostructures

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“…Photocatalytic water splitting using a heterogeneous semiconductor powder is one of the basic techniques. [1] It has been reported that metal oxynitride photocatalysts [2,3] and Z-scheme-type photocatalysts driven by two-photon process [4][5][6][7][8][9][10][11][12] show activity for water splitting under visible-light irradiation. However, the present efficiencies are not satisfying for practical use.…”

Section: Introductionmentioning

confidence: 99%

Water Splitting over New Niobate Photocatalysts with Tungsten‐Bronze‐Type Structure and Effect of Transition Metal‐Doping

Miseki

Kudo

2010

ChemSusChem

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Photophysical properties and photocatalytic activities for water splitting over KM(2)Nb(5)O(15) (M = Sr and Ba) and K(2)LnNb(5)O(15) (Ln = La, Pr, Nd, and Sm) with tungsten bronze-type structure were investigated. Single phases of KM(2)Nb(5)O(15) and K(2)LnNb(5)O(15) were successfully prepared by solid-state reaction (SSR) method and polymerizable complex (PC) method. The band gaps of these niobates were estimated to be 3.1-3.5 eV. These metal oxides loaded with an activated NiO(x) cocatalyst showed photocatalytic activities for water splitting into H(2) and O(2) under UV irradiation. When K(2)LaNb(5)O(15) was doped by Rh ions, a new visible-light absorption band was observed around 400-500 nm in addition to the band gap absorption band of the K(2)LaNb(5)O(15) host. K(2)LaNb(5)O(15):Rh showed photocatalytic activities for H(2) or O(2) evolution from an aqueous solution containing a sacrificial reagent under visible-light irradiation.

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“…TiO 2 NPs promotes the photosynthesis rate by changing the light energy to electron energy and then to active chemistry energy. Sayama et al (2002) demonstrated that the mechanism to Vol. 8, No.…”

Section: Discussionmentioning

confidence: 99%

Facilitate Seed Germination of the Golden Shower Tree (Cassia fistula) in vitro Using TiO2 Nanoparticles and Scarification Treatments

Feizi¹,

Mousavi²

2016

JAS

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The main propagation method of Cassia fistula is sowing seeds. The seed germination is usually low because of its impermeable hard coat. Therefore, this experiment evaluated the effects of TiO 2 nanoparticles and scarification methods on seed germination and seedling growth in vitro condition. The tree seeds were treated with, hot water, H 2 SO 4 (36N), and mechanical scarification and culture on ¼ MS salt mixture. The medium was supplemented with different concentrations of TiO 2 nanoparticles. The results showed that the highest percentage and rate of germination was recorded in seeds treated with mechanical scarification. The highest shoot and root dry weight was recorded for seeds treated with mechanical scarification and grown on MS media supplemented with 1.5 mg/ml TiO 2 nanoparticles. TiO 2 nanoparticles did not show any significant effects on the percentage and rate of germination. Different growing soil mixtures had significant effects on the growth of the ex vitro transferred plantlets. Coco peat and peat moss mixture (1:1) was found to be more effective in increasing the number of leaves and root length of the seedlings.

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A new photocatalytic water splitting system under visible light irradiation mimicking a Z-scheme mechanism in photosynthesis

Cited by 362 publications

References 33 publications

Catalytic Applications of Carbon Dots

Catalytic Applications of Carbon Dots

Water Splitting over New Niobate Photocatalysts with Tungsten‐Bronze‐Type Structure and Effect of Transition Metal‐Doping

Facilitate Seed Germination of the Golden Shower Tree (Cassia fistula) in vitro Using TiO2 Nanoparticles and Scarification Treatments

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