Enhancement of photocatalytic hydrogen production rate using photosensitized TiO2/RuO2-MV2+

Nada, Amr A.; Hamed, Hamid; Barakat, M.H.; Mohamed, N.R.; Везироглу, Т. Н.

doi:10.1016/j.ijhydene.2008.04.027

Cited by 90 publications

(40 citation statements)

References 24 publications

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“…Changes in charge of the solid surface may affect electrostatic interactions between photocatalyst and reagents (i.e., sacrificial agents, redox mediators) [161]. In the case of photoreforming, hydroxyl groups on the surface act as adsorption centers for sacrificial agents and scavenging sites for photogenerated holes [162].…”

Section: Ph Of the Solutionmentioning

confidence: 99%

Hydrogen Generation through Solar Photocatalytic Processes: A Review of the Configuration and the Properties of Effective Metal-Based Semiconductor Nanomaterials

et al. 2017

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Photocatalytic water splitting and organic reforming based on nano-sized composites are gaining increasing interest due to the possibility of generating hydrogen by employing solar energy with low environmental impact. Although great efforts in developing materials ensuring high specific photoactivity have been recently recorded in the literature survey, the solar-to-hydrogen energy conversion efficiencies are currently still far from meeting the minimum requirements for real solar applications. This review aims at reporting the most significant results recently collected in the field of hydrogen generation through photocatalytic water splitting and organic reforming, with specific focus on metal-based semiconductor nanomaterials (e.g., metal oxides, metal (oxy)nitrides and metal (oxy)sulfides) used as photocatalysts under UVA or visible light irradiation. Recent developments for improving the photoefficiency for hydrogen generation of most used metal-based composites are pointed out. The main synthesis and operating variables affecting photocatalytic water splitting and organic reforming over metal-based nanocomposites are critically evaluated.

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Section: Ph Of the Solutionmentioning

confidence: 99%

Hydrogen Generation through Solar Photocatalytic Processes: A Review of the Configuration and the Properties of Effective Metal-Based Semiconductor Nanomaterials

et al. 2017

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“…Several semiconductor photocatalysts have been studied for dye sensitization including TiO 2 , SrTiO 3 , ZnO, SnO 2 , and Cu 2 O [63,64]. Among them, TiO 2 is the best photocatalyst in terms of (i) cost, (ii) availability, (iii) toxicity, (iv) stability against photocorrosion, and (v) electronic energy band structure [65,66].…”

Section: Dye-sensitized Photocatalytic Degradation Of Phenol and Phenmentioning

confidence: 99%

Degradation of Phenolic Compounds Through UV and Visible- Light-Driven Photocatalysis: Technical and Economic Aspects

Chowdhury¹,

Nag²,

Ray³

2017

Phenolic Compounds - Natural Sources, Importance and Applications

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Phenolic compounds are found in surface and groundwater as well as wastewater from several industries. It is necessary to eliminate phenols and phenolic compounds from contaminated water before releasing into water bodies due to their toxicity to human beings. Photocatalytic degradation seems to be a promising technology for the degradation of several phenolic compounds. Complete mineralization of phenol and phenolic compound has been achieved with TiO 2 -based photocatalysts under both UV and visible-light irradiation. This chapter will evaluate the conventional processes and advanced oxidation processes for the degradation of phenol and phenolic compounds. The process economics and efficiencies of different advanced oxidation processes will also be discussed. The main focus of the chapter is photocatalytic degradation processes under UV and visible light along with a detailed review of several factors affecting degradation of phenol and phenolic compounds. Photocatalytic degradation process is governed by reactions with hydroxyl radical or superoxide ion. The extent of degradation depends on light sources (UV, visible, and solar), the type of photocatalyst, and experimental conditions (pH, photocatalyst dosage, initial concentration of phenolic compounds, light intensity, electron donor concentration, etc.). Visible-light-active photocatalysts are applied by several researchers to exploit sunlight and to make the photocatalysis process sustainable. In the future, using sunlight in place of UV could make photocatalysis economically more efficient.

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“…The outcome of this study indicated the order of various dyes in the enhancement of solar hydrogen generation as follow: copper phthalocyanine > ruthenium bipyridyl > eosin Y [58]. The difference in performance of the used dyes is ascribed to their different structure and properties and the difference in their electron injection ability.…”

Section: An Overview Of Dyes As Photosensitizersmentioning

confidence: 84%

“…However, research on other transition metals is very limited compared to Ru-complexes. Metal porphyrins (MPs) and metal phthalocyanines (MPcs) are two notable examples of these metal complexes that have been widely used in dye-sensitization photocatalysis [58][59][60][61][62]. Typical molecular structures and symbols of the metal complexes are shown in Figure 13 [63].…”

Section: An Overview Of Dyes As Photosensitizersmentioning

confidence: 99%

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Dye-Sensitized Photocatalytic Water Splitting and Sacrificial Hydrogen Generation: Current Status and Future Prospects

2017

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Today, global warming and green energy are important topics of discussion for every intellectual gathering all over the world. The only sustainable solution to these problems is the use of solar energy and storing it as hydrogen fuel. Photocatalytic and photo-electrochemical water splitting and sacrificial hydrogen generation show a promise for future energy generation from renewable water and sunlight. This article mainly reviews the current research progress on photocatalytic and photo-electrochemical systems focusing on dye-sensitized overall water splitting and sacrificial hydrogen generation. An overview of significant parameters including dyes, sacrificial agents, modified photocatalysts and co-catalysts are provided. Also, the significance of statistical analysis as an effective tool for a systematic investigation of the effects of different factors and their interactions are explained. Finally, different photocatalytic reactor configurations that are currently in use for water splitting application in laboratory and large scale are discussed.

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Enhancement of photocatalytic hydrogen production rate using photosensitized TiO2/RuO2-MV2+

Cited by 90 publications

References 24 publications

Hydrogen Generation through Solar Photocatalytic Processes: A Review of the Configuration and the Properties of Effective Metal-Based Semiconductor Nanomaterials

Hydrogen Generation through Solar Photocatalytic Processes: A Review of the Configuration and the Properties of Effective Metal-Based Semiconductor Nanomaterials

Degradation of Phenolic Compounds Through UV and Visible- Light-Driven Photocatalysis: Technical and Economic Aspects

Dye-Sensitized Photocatalytic Water Splitting and Sacrificial Hydrogen Generation: Current Status and Future Prospects

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