S-TiO2/S-reduced graphene oxide for enhanced photoelectrochemical water splitting

Elbakkay, Mohamed H.; Rouby, Waleed M. A. El; El-Dek, S.I.; Farghali, Ahmed A.

doi:10.1016/j.apsusc.2018.01.070

Cited by 68 publications

(28 citation statements)

References 56 publications

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“…Besides, the large thicknesses or dimensions of these materials probably hinder sunlight absorption and prolong the transfer distances of photogenerated holes. [219] Lately, graphene has been introduced in some PEC system in order to facilitate water oxidation. [218] Graphene is a very promising metal-free material which contains 2D sp 2 carbon atoms aligned in a honeycomb structure and has been widely incorporated with semiconductors owing to its intrinsic physicochemical properties and large specific surface area.…”

Section: Metal-free Cocatalystsmentioning

confidence: 99%

“…Other studies [223,224] also imply that rGO can improve the conductivity of the surface and eventually give rise to an enhanced PEC performance. Elbakkay et al [219] successfully synthesized the S-TiO 2 /S-rGO photoanodes. Common heterodopants include nitrogen, phosphorous, and sulfur.…”

Section: Metal-free Cocatalystsmentioning

confidence: 99%

“…Graphene is a very promising metal‐free material which contains 2D sp 2 carbon atoms aligned in a honeycomb structure and has been widely incorporated with semiconductors owing to its intrinsic physicochemical properties and large specific surface area . Lately, graphene has been introduced in some PEC system in order to facilitate water oxidation.…”

Section: Cocatalysts For Photoanodes: Construction and Regulationmentioning

confidence: 99%

“…Part of the carbon sites in the framework structure of rGO can be replaced with these heterodopants and the introduction of defects also arises from them. Elbakkay et al successfully synthesized the S‐TiO 2 /S‐rGO photoanodes. They found that the doping of S could make the thickness of rGO cut down to 0.51 nm and the roughness risen up to 1.328 mm, resulting in a higher photocurrent density of 3.36 mA cm −2 at 1 V Ag/AgCl than the pure TiO 2 photoanode.…”

Section: Cocatalysts For Photoanodes: Construction and Regulationmentioning

confidence: 99%

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Rational Design and Construction of Cocatalysts for Semiconductor‐Based Photo‐Electrochemical Oxygen Evolution: A Comprehensive Review

et al. 2018

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Photo‐electrochemical (PEC) water splitting, as an essential and indispensable research branch of solar energy applications, has achieved increasing attention in the past decades. Between the two photoelectrodes, the photoanodes for PEC water oxidation are mostly studied for the facile selection of n‐type semiconductors. Initially, the efficiency of the PEC process is rather limited, which mainly results from the existing drawbacks of photoanodes such as instability and serious charge‐carrier recombination. To improve PEC performances, researchers gradually focus on exploring many strategies, among which engineering photoelectrodes with suitable cocatalysts is one of the most feasible and promising methods to lower reaction obstacles and boost PEC water splitting ability. Here, the basic principles, modules of the PEC system, evaluation parameters in PEC water oxidation reactions occurring on the surface of photoanodes, and the basic functions of cocatalysts on the promotion of PEC performance are demonstrated. Then, the key progress of cocatalyst design and construction applied to photoanodes for PEC oxygen evolution is emphatically introduced and the influences of different kinds of water oxidation cocatalysts are elucidated in detail. Finally, the outlook of highly active cocatalysts for the photosynthesis process is also included.

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Section: Metal-free Cocatalystsmentioning

confidence: 99%

Section: Metal-free Cocatalystsmentioning

confidence: 99%

Section: Cocatalysts For Photoanodes: Construction and Regulationmentioning

confidence: 99%

Section: Cocatalysts For Photoanodes: Construction and Regulationmentioning

confidence: 99%

See 2 more Smart Citations

Rational Design and Construction of Cocatalysts for Semiconductor‐Based Photo‐Electrochemical Oxygen Evolution: A Comprehensive Review

et al. 2018

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“…Nevertheless, its wide band gap, narrow spectrum response, high photogenerated carrier recombination rate, and short hole diffusion length have limited the application and development of TiO2 photoelectrodes in PEC water splitting [8]. To improve the performance of TiO2, a variety of methods have been developed, including ion doping [9], heterojunction construction [10], and coupling with a cocatalyst [11]. For example, Liu et al [12] reported a novel two-dimensional (2D) ZnIn2S4 nanosheet/one-dimensional (1D) TiO2 nanorod heterostructure in which the gradient energy level and built-in electric field led to reduced separation of electron-hole pairs and improved charge separation efficiency, which greatly improved its performance in PEC water splitting.…”

Section: Introductionmentioning

confidence: 99%