Dye sensitized hydrogen evolution from water

Dhanalakshmi, K.

doi:10.1016/s0360-3199(00)00134-8

Cited by 133 publications

(65 citation statements)

References 33 publications

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“…That is, e À must be transported from the dyes to TiO 2 as quickly as possible, and the dyes should be stable enough to resist the attack of h + . In order to facilitate e À transportation, dyes are linked to the surface of TiO 2 nanoparticles via functional groups by various interactions between the dyes and TiO 2 , such as cova- [19] Dhanalakshmi et al [179] found that only dye molecules absorbed on the surface of TiO 2 can effectively inject electrons into TiO 2 for water reduction.…”

Section: Sensitizing With Dyesmentioning

confidence: 99%

“…[178,180] For hydrogen production, ruthenium bipyridyl complexes are the most extensively used sensitizers. [179,181,182] Bae et al [181] systematically investigated the effects of the anchoring groups in ruthenium bipyridyl complexes on the sensitized production of hydrogen over TiO 2 and found that phosphonate anchoring groups showed a much better sensitizing effect for hydrogen evolution than carboxylate groups because of the stronger anchoring ability. Malinka et al [183] investigated the hydrogen production of zinc porphyrin sensitized Pt/TiO 2 and found that the rate of hydrogen production depended on the surface concentrations of platinum, zinc porphyrins, and electron donors on titania.…”

Section: Sensitizing With Dyesmentioning

confidence: 99%

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Hydrogen Production over Titania‐Based Photocatalysts

et al. 2010

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Because of their relatively high efficiency, high photostability, abundance, low cost, and nontoxic qualities, titania-based photocatalysts are still the most extensively studied materials for the photocatalytic production of hydrogen from water. The effects of the chemical and physical properties of titania, including crystal phase, crystallinity, particle size, and surface area, on its photoactivity towards hydrogen generation have been identified by various investigations. The high overpotential for hydrogen generation, rapid recombination of photogenerated electrons and holes, rapid reverse reaction of molecular hydrogen and oxygen, and inability to absorb visible light are considered the most important factors that restrict the photoactivity of titania, and strategies to overcome these barriers have been developed. These issues and strategies are carefully reviewed and summarized in this Minireview. We aim to provide a critical, up-to-date overview of the development of titania-based photocatalysts for hydrogen production, as well as a comprehensive background source and guide for future research.

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Section: Sensitizing With Dyesmentioning

confidence: 99%

Section: Sensitizing With Dyesmentioning

confidence: 99%

Hydrogen Production over Titania‐Based Photocatalysts

et al. 2010

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“…In recent years, the investigations of TiO 2 photocatalyst focus on promoting the photocatalytic activity by enhancing the visible absorption and suppressing recombination. Various modification approaches were developed, including noble metal loading [4,9,10], metal ion and anion doping [11][12][13][14][15][16], dye sensitization [17][18][19][20], and composite semiconductor coupling [18,19,[21][22][23][24][25]. However, the aforementioned routes of TiO 2 modifications focus on crystalline TiO 2 , and there are few studies of remediation to amorphous intrinsic TiO 2 as it was declared to be photocatalytically inactive due to its defective states [26].…”

Section: Introductionmentioning

confidence: 99%

The photocatalytic properties of amorphous TiO2 composite films deposited by magnetron sputtering

Huang

Liu

et al. 2011

Res Chem Intermed

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The preparation of amorphous TiO 2 film coupled with various metaloxide semiconductors and their photocatalytic activities evaluated by photodegradation of methylene blue and rhodamine B aqueous solution are briefly reviewed. The proposed photoreaction mechanism of the amorphous composite semiconductor and the differences between amorphous TiO 2 -based films and crystalline TiO 2 photocatalytic materials in terms of preparation and usage are addressed. The inactive intrinsic amorphous TiO 2 film coupled with various metal oxides were found to gain high photocatalytic activity. These dopants induce forming new energy levels in the band gap of TiO 2 to enhance the charge separation of the photoinduced electrons and holes and extend the light absorption of TiO 2 -based photocatalytic films into the visible region. In addition, two different effects of coupling metal oxides have been proved: the introduction of oxides of W, Cr, V, Ag, and Mo can significantly increase the photo-reactivity of amorphous TiO 2 film, while the combination of oxides of Zr, Sn, Sb, Cu, Ta, Fe, and Ni cannot affect the inactivity of pure amorphous TiO 2 film.

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“…Maruthamuthu et al achieved overall water splitting for H 2 and O 2 production simultaneously using [Ru(dcbyp) 2 (-dpq)] 2? -sensitized Pt/TiO 2 (Dhanalakshmi et al 2001). Mallouk et al claimed that the apparent quantum yield (AQY) of visible-light-driven photocatalytic H 2 production over Ru(bpy) 3 2?…”

Section: Introductionmentioning

confidence: 99%

Eosin Y-sensitized nanosheet-stacked hollow-sphere TiO2 for efficient photocatalytic H2 production under visible-light irradiation

et al. 2015

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Nanosheet (with around 20 nm in thickness)-stacked hollow-sphere TiO 2 was synthesized via a modified solvothermal reaction for different times followed by calcination treatment at different temperatures. After surface modification by different cations (H ? or Fe 3? ) and further sensitization by Eosin Y, the obtained photocatalysts achieved remarkably enhanced H 2 -production activity (about 4.2 times of that for Eosin Y-sensitized P25) and stability under visible-light irradiation. The improved photocatalytic performance was synergistically caused by the enhanced Eosin Y sensitization (due to the enlarged surface area and electropositively modified surface), the optimized crystal structure (well-crystallized anatase phase), and the unique micro/nanostructure (nanosheet-stacked hollow spheres). This work presented an effective route to explore new visible-lightdriven H 2 -production photocatalysts by coupling nanomaterials with special morphologies and metalfree dyes with visible-light absorption.

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Dye sensitized hydrogen evolution from water

Cited by 133 publications

References 33 publications

Hydrogen Production over Titania‐Based Photocatalysts

Hydrogen Production over Titania‐Based Photocatalysts

The photocatalytic properties of amorphous TiO2 composite films deposited by magnetron sputtering

Eosin Y-sensitized nanosheet-stacked hollow-sphere TiO2 for efficient photocatalytic H2 production under visible-light irradiation

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