Bi2S3/TiO2 and CdS/TiO2 heterojunctions as an available configuration for photocatalytic degradation of organic pollutant

Bessekhouad, Y.; Robert, Didier; Weber, J.V.

doi:10.1016/j.jphotochem.2004.02.006

Cited by 550 publications

(305 citation statements)

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“…There has been much interest in coupling different semiconductor particles with TiO 2 , with coupled samples such as TiO 2 -CdS, Bi 2 S 3 -TiO 2 , TiO 2 -WO 3 , TiO 2 -SnO 2, TiO 2 -MoO 3, and TiO 2 -Fe 2 O 3 being reported [111][112][113][114][115][116][117][118]. The coupled structure that has received the most attention is that consisting of CdS and TiO 2 colloidal particles.…”

Section: Coupled/composite Tiomentioning

confidence: 99%

“…The conduction band of Bi 2 S 3 nanoparticles is less anodic than the conduction band of TiO 2 and the valence band is more cathodic than the valence band of TiO 2 [113], enhancing electron injection from the excited state of Bi 2 S 3 into TiO 2 . Bessekhouad et al [114] studied a Bi 2 S 3 /TiO 2 junction prepared by precipitation of different concentrations of Bi 2 S 3 onto TiO 2 . Bi 2 S 3 absorbed a large portion of visible light and when the junction contained 10 wt% Bi 2 S 3 , the absorbance started at 800 nm.…”

Section: Coupled/composite Tiomentioning

confidence: 99%

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A review of TiO2 nanoparticles

2011

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Climate change and the consumption of non-renewable resources are considered as the greatest problems facing humankind. Because of this, photocatalysis research has been rapidly expanding. TiO 2 nanoparticles have been extensively investigated for photocatalytic applications including the decomposition of organic compounds and production of H 2 as a fuel using solar energy. This article reviews the structure and electronic properties of TiO 2 , compares TiO 2 with other common semiconductors used for photocatalytic applications and clarifies the advantages of using TiO 2 nanoparticles. TiO 2 is considered close to an ideal semiconductor for photocatalysis but possesses certain limitations such as poor absorption of visible radiation and rapid recombination of photogenerated electron/hole pairs. In this review article, various methods used to enhance the photocatalytic characteristics of TiO 2 including dye sensitization, doping, coupling and capping are discussed. Environmental and energy applications of TiO 2 , including photocatalytic treatment of wastewater, pesticide degradation and water splitting to produce hydrogen have been summarized. Historical backgroundThe growth of industry worldwide has tremendously increased the generation and accumulation of waste byproducts. In general, the production of useful products has been focused on and the generation of waste byproducts has been largely ignored. This has caused severe environmental problems that have become a major concern. Researchers all over the world have been working on various approaches to address this issue. Photoinduced processes have been studied and various applications have been developed. One important technique for removing industrial waste is the use of light energy (electromagnetic radiation) and particles sensitive to this energy to mineralize waste which aids in its removal from solution. Titanium dioxide (TiO 2 ) is considered very close to an ideal semiconductor for photocatalysis because of its high stability, low cost and safety toward both humans and the environment.*Corresponding author (email: shipra.mital@gmail.com)In 1964, Kato et al.[1] published their work on the photocatalytic oxidation of tetralin (1,2,3,4-tetrahydronaphthalene) by a TiO 2 suspension, which was followed by McLintock et al. [2] investigating the photocatalytic oxidation of ethylene and propylene in the presence of oxygen adsorbed on TiO 2 . However, the most important discovery that extensively promoted the field of photocatalysis was the "Honda-Fujishima Effect" first described by Fujishima and Honda in 1972 [3]. This well-known chemical phenomenon involves electrolysis of water, which is related to photocatalysis. Photoirradiation of a TiO 2 (rutile) single crystal electrode immersed in an aqueous electrolyte solution induced the evolution of oxygen from the TiO 2 electrode and the evolution of hydrogen from a platinum counterelectrode when an anodic bias was applied to the TiO 2 working electrode. In 1977, Frank and Bard [4] examined the reduction of ...

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Section: Coupled/composite Tiomentioning

confidence: 99%

Section: Coupled/composite Tiomentioning

confidence: 99%

A review of TiO2 nanoparticles

2011

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“…To create the efficient heterojunction system, both semiconductors must possess different energy levels from their corresponding conduction and valence bands. In such a configuration, several advantages can be obtained: (a) an improvement of charge carriers' separation; (b) an increase in the lifetime of the charge carrier; and (c) an enhancement of the interfacial charge transfer efficiency to adsorbed substrates [68,69].…”

Section: Metallic Copper-plasmonic Photocatalysismentioning

confidence: 99%

On the Origin of Enhanced Photocatalytic Activity of Copper-Modified Titania in the Oxidative Reaction Systems

2017

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Modification of titania with copper is a promising way to enhance the photocatalytic performance of TiO 2 . The enhancement means the significant retardation of charge carriers' recombination ratio and the introduction of visible light activity. This review focuses on two main ways of performance enhancement by copper species-i.e., originated from plasmonic properties of zero-valent copper (plasmonic photocatalysis) and heterojunctions between semiconductors (titania and copper oxides). The photocatalytic performance of copper-modified titania is discussed for oxidative reaction systems due to their importance for prospective applications in environmental purification. The review consists of the correlation between copper species and corresponding variants of photocatalytic mechanisms including novel systems of cascade heterojunctions. The problem of stability of copper species on titania, and the methods of its improvement are also discussed as important factors for future applications. As a new trend in the preparation of copper-modified titania photocatalyst, the role of particle morphology (faceted particles, core-shell structures) is also described. Finally, in the conclusion section, perspectives, challenges and recommendations for future research on copper-modified titania are formulated.

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“…TiO 2 powders could be employed in solar and UV irradiation systems (photoreactors) because this semiconductor has a high transparency to visible light, high refractive index, and low absorption coefficient. Wide range of metal oxides and sulfides have been used as photocatalysts including ZnO (Daneshvar et al, 2004;Sakthivel et al, 2003;Kormann et al, 1988;Khodj et al, 2001;Gouvêa et al, 2000;Lizama et al, 2002;Kansal et al, 2007;Chakrabarti and Dutta, 2004), WO 3 (Waldner et al, 2007;Sayama et al, 2010;Saepurahmanet et al, 2010;Cao et al, 2011), WS 2 (Jing and Guo, 2007), Fe 2 O 3 (Chen et al, 2001;Bandara et al, 2001;Pal and Sharon, 1998), V 2 O 5 (Akbarzadeh et al, 2010;Teramura et al, 2004a,b), CeO 2 (Lin and Yu, 1998;Coronado et al, 2002;Ji et al, 2009;Song et al, 2007), CdS (Bessekhouad et al, 2004;Reuterġardh and Langphasuk, 1997;Tang and Huang, 1995), ZnS (Torres-Martínez et al, 2001), and CuO (Lim and Kim, 2004;Sathishkumar et al, 2011;Nezamzadeh-Ejheieg and Hushmandrad, 2010). The light intensity in homogeneous and heterogeneous photoreactors determines the LVREA which is proportional to the rate of photochemical reaction.…”

Section: Principles Of Photocatalysismentioning

confidence: 99%