Mixed phase titania nanocomposite codoped with metallic silver and vanadium oxide: New efficient photocatalyst for dye degradation

Xia, Yang; Ma, Fengyan; Li, Kexin; Guo, Yingna; Hu, Jianglei; Li, Wei; Huo, Mingxin; Guo, Yihang

doi:10.1016/j.jhazmat.2009.10.024

Cited by 153 publications

(85 citation statements)

References 41 publications

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“…The improvement in the photocatalytic activity was ascribed to the synergistic effects of nitrogen and cerium codoping. Yang et al [110] codoped TiO 2 with metallic silver and vanadium oxide using a one-step sol-gel solvothermal method in the presence of a triblock copolymer surfactant (P123). The resulting Ag/V-TiO 2 three-component junction system exhibited the highest photocatalytic activity for the degradation of rhodamine B and Coomassie Brilliant Blue G-250 under both visible and UV light exceeding that of Degussa P25, pure TiO 2 , singly-doped TiO 2 (Ag/TiO 2 or V-TiO 2 ) as well as a P123-free-Ag/V-TiO 2 codoped system.…”

Section: Codopingmentioning

confidence: 99%

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: Codopingmentioning

confidence: 99%

A review of TiO2 nanoparticles

2011

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“…Doping is one of the means to achieve the above-mentioned characteristics. Metal ions of noble metals (Pt, Pd, Ag, and Au) [166] and transition metals (Cr, Cu, Mn, Zn, Co, Fe, and Ni) [167] are used as dopants [168]. Even non-metals such as C, N, S, and P are used for this purpose [160,161,163,169].…”

Section: Titanium Dioxide As Photocatalystsmentioning

confidence: 99%

Metal oxide semiconducting interfacial layers for photovoltaic and photocatalytic applications

Elumalai

Chellappan

Jose

et al. 2015

Mater Renew Sustain Energy

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The present review rationalizes the significance of the metal oxide semiconductor (MOS) interfaces in the field of photovoltaics and photocatalysis. This perspective considers the role of interface science in energy harvesting using organic photovoltaics (OPVs) and dye-sensitized solar cells (DSSCs). These interfaces include large surface area junctions between photoelectrodes and dyes, the interlayer grain boundaries within the photoanodes, and the interfaces between photoactive layers and the top and bottom contacts. Controlling the collection and minimizing the trapping of charge carriers at these boundaries is crucial to overall power conversion efficiency of solar cells. Similarly, MOS photocatalysts exhibit strong variations in their photocatalytic activities as a function of band structure and surface states. Here, the MOS interface plays a vital role in the generation of OH radicals, which forms the basis of the photocatalytic processes. The physical chemistry and materials science of these MOS interfaces and their influence on device performance are also discussed.

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“…This behaviour may be explained by the fact that the increasing Mn substitution leads to creation of oxygen vacancies at the equatorial planes of perovskite vanadate layers [13,28]. Such oxygen vacancies not only extend the Synthesis, Microwave-Assisted Calcination, and Photocatalytic Efficiency optical absorption edge into the visible light region, but also serve as active sites available for the dye molecules to adsorb on the surface of photocatalysts and due to which their photocatalytic degradation becomes effectively enhanced [29]. The UV-vis spectrum of CV dye solution before photolysis and photocatalytic degradation, shows a main absorbance in visible light region at 590 nm ( Figure 6).…”

Section: Structural and Polymorphic Properties Of Photocatalystmentioning

confidence: 99%

“…The dye photocatalytic degradation reactions can be schematically summarized in Figure 9 [16,[29][30][31]. The resulting radical (OH .…”

Section: •+mentioning

confidence: 99%

A Novel Visible– Light Driven Photocatalyst: Ethylene Glycol–Citrate Sol–Gel Synthesis, Microwave–Assisted Calcination, and Photocatalytic Efficiency

Alarique¹

2014

AJPC

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Abstract:A novel visible-light driven photocatalyst, BIMNVOX.x was synthesized by ethylene glycol-citrate sol-gel route and microwave-assisted calcination. The phocatalyst was characterized structurally by X-ray powder diffraction (XRPD) and simultaneous thermogravimetric-differential thermal analysis (TG-DTA). Its optical and surface properties were determined by means of UV-vis absorption spectrophotometry and BET-nitrogen adsorption isotherm measurements, respectively. The photocatalytic efficiency of BIMNVOX.x system was investigated by applying the pseudo first-order kinetic model to the photocatalytic degradation reaction of crystal violet, CV dye in aqueous solution under visible light irradiation. The β (orthorhombic) -BIMNVOX phase, space group Acam exhibited the highest photocatalytic degradability, indicating that the photocatalytic efficiency of BIMNVOX catalyst is essentially enhanced by the increased number of catalyst active sites, irrespective of the kind of phase stabilized and the increasing photoabsorption ability with Mn dopant content. Moreover, the possible photocatalytic degradation mechanism of aqueous CV dye solution under visible light irradiation was also proposed.

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Mixed phase titania nanocomposite codoped with metallic silver and vanadium oxide: New efficient photocatalyst for dye degradation

Cited by 153 publications

References 41 publications

A review of TiO2 nanoparticles

A review of TiO2 nanoparticles

Metal oxide semiconducting interfacial layers for photovoltaic and photocatalytic applications

A Novel Visible– Light Driven Photocatalyst: Ethylene Glycol–Citrate Sol–Gel Synthesis, Microwave–Assisted Calcination, and Photocatalytic Efficiency

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