Transparent visible light activated C–N–F-codoped TiO2 films for self-cleaning applications

Xu, Qingchi; Wellia, Diana Vanda; Sk, Mahasin Alam; Lim, Kok Hwa; Loo, Say Chye Joachim; Liao, Dai Wei; Amal, Rose; Tan, Timothy Thatt Yang

doi:10.1016/j.jphotochem.2009.12.017

Cited by 85 publications

(26 citation statements)

References 35 publications

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“…This has been demonstrated in several systems, such as N-Sn [29], N-Fe [30], N-W [31], N-B [32], N-F [33,34], N-Ag [35], N-Pd [36] and N-C-F [37]. Bi-doped TiO 2 photocatalysts are especially concerned with high photocatalytic activities even under visible light in recent several reports [38][39][40][41][42][43].…”

Section: Introductionmentioning

confidence: 88%

Synthesis, Characterization and Photocatalytic Performance of TiO2 Codoped with Bismuth and Nitrogen

Kang

Yuan

et al. 2011

Catal Lett

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Bi-N-TiO 2 nanoparticles were synthesized via anneal after a simple sol-gel combined hydrothermal method. X-ray diffraction (XRD), UV-Visible diffuse reflectance spectra, Scanning Electron Microscope (SEM) and X-ray photoelectron spectra (XPS) confirm that the grain sizes are almost uniform diameters of about 11 nm, the response to light extends to visible region, the doped ions substitute some of the lattice titanium atoms, and furthermore Bi 3? and Bi 4? ions coexist. The photodegradation of acid orange 7 (AO7) is used to evaluate the photocatalytic activity of the prepared Bi-N-TiO 2 nanoparticles. The experiments indicated that Bi-N-TiO 2 showed higher photocatalytic activity than that of P25, TiO 2 , N-TiO 2 and Bi-TiO 2 in the visible light area and ultraviolet light. The improvement of photocatalytic activity of Bi-N-TiO 2 is more likely because the N doping causes the visible light response and improves the quantum yield and photocatalytic activity of TiO 2 , and Bi doping causes the enhancement of the separation of photogenerated charges.

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Section: Introductionmentioning

confidence: 88%

Synthesis, Characterization and Photocatalytic Performance of TiO2 Codoped with Bismuth and Nitrogen

Kang

Yuan

et al. 2011

Catal Lett

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“…Transparent C-F-N co-doped titanium dioxide thin films produced by the sol-gel method have been reported to show strong visible-light absorption and high photocatalytic performance. In addition, the increase in surface roughness produced by the co-doping induced a superhydrophilicity even under dark conditions [48].…”

Section: Dopingmentioning

confidence: 99%

“…Nitrogen and fluorine co-doping have been reported to produce better photocatalytic performance than pure TiO 2 [48]. This has been attributed to a synergy effect between the increase in absorption in the visible by N-atoms and the formation of new active sites by F-atoms [49].…”

Section: Dopingmentioning

confidence: 99%

Thin Films for Advanced Glazing Applications

et al. 2016

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Functional thin films provide many opportunities for advanced glazing systems. This can be achieved by adding additional functionalities such as self-cleaning or power generation, or alternately by providing energy demand reduction through the management or modulation of solar heat gain or blackbody radiation using spectrally selective films or chromogenic materials. Self-cleaning materials have been generating increasing interest for the past two decades. They may be based on hydrophobic or hydrophilic systems and are often inspired by nature, for example hydrophobic systems based on mimicking the lotus leaf. These materials help to maintain the aesthetic properties of the building, help to maintain a comfortable working environment and in the case of photocatalytic materials, may provide external pollutant remediation. Power generation through window coatings is a relatively new idea and is based around the use of semi-transparent solar cells as windows. In this fashion, energy can be generated whilst also absorbing some solar heat. There is also the possibility, in the case of dye sensitized solar cells, to tune the coloration of the window that provides unheralded external aesthetic possibilities. Materials and coatings for energy demand reduction is highly desirable in an increasingly energy intensive world. We discuss new developments with low emissivity coatings as the need to replace scarce indium becomes more apparent. We go on to discuss thermochromic systems based on vanadium dioxide films. Such systems are dynamic in nature and present a more sophisticated and potentially more beneficial approach to reducing energy demand than static systems such as low emissivity and solar control coatings. The ability to be able to tune some of the material parameters in order to optimize the film performance for a given climate provides exciting opportunities for future technologies. In this article, we review recent progress and challenges in these areas and provide a perspective for future trends and developments.

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“…Doping of metal ions such as Cr, V, Fe, Pb, Cu has been explored [39][40][41], but it should be noted that improvement has not been observed in all cases. Non-metal doped TiO 2 (C-N-F doped TiO 2 ) thin films are also active under visible-light irradiation and can therefore act as self-cleaning surfaces [42][43][44]. It is generally observed that non-metal doping is more promising than metal doping to produce visible-light photocatalytic activity.…”

Section: Self-cleaning Action Of Metal Oxide With Metal and Non-metalmentioning

confidence: 99%

Metal oxide thin films and nanostructures for self-cleaning applications: current status and future prospects

Krishna

Madhurima

Purkayastha

2013

Eur. Phys. J. Appl. Phys.

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Abstract. Surfaces that exhibit reversible wettability toward water are extremely important for a variety of technological applications. In this context, the development of superhydrophobic and superhydrophilic surfaces for self-cleaning applications has been receiving a great deal of attention in the last few years. In this review, an overview of the current state-of-science and technology of self-cleaning surfaces is presented. The current understanding of physics of wetting leading to surfaces with predictive, controllable and reversible wettability is first presented. The review then focuses on materials, mainly metal oxides and their composites, employed for self-cleaning applications. It is shown that, although conventionally oxides and polymers are considered for self-cleaning applications, recent developments point toward the use of artificially engineered surfaces with hierarchical roughness. Applications of self-cleaning films in nonconventional areas such as protection of fabrics, solar cells and structures related to cultural heritage are discussed. The review ends with an outlook for the future in terms of science and technology of self-cleaning surfaces.

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Transparent visible light activated C–N–F-codoped TiO2 films for self-cleaning applications

Cited by 85 publications

References 35 publications

Synthesis, Characterization and Photocatalytic Performance of TiO2 Codoped with Bismuth and Nitrogen

Synthesis, Characterization and Photocatalytic Performance of TiO2 Codoped with Bismuth and Nitrogen

Thin Films for Advanced Glazing Applications

Metal oxide thin films and nanostructures for self-cleaning applications: current status and future prospects

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