Assessing the photoelectrochemical properties of C, N, F codoped TiO 2 nanotubes of different lengths

Chatzitakis, Athanasios; Grandcolas, Mathieu; Xu, Kaiqi; Mei, Sen; Yang, Juan; Jensen, Ingvild Julie Thue; Simon, Christian; Norby, Truls

doi:10.1016/j.cattod.2016.11.040

Cited by 34 publications

(24 citation statements)

References 48 publications

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“…Moreover, the addition of suitable content of Cu-to N-doped TiO 2 electrode effectively inhibited the growth of TiO 2 nanoparticles and improved the optical response of the photoelectrode under visible light irradiation. Chatzitakis et al [81] studied the photoelectrochemical properties of C, N, F codoped TiO 2 nanotubes. It was found that increasing surface area is not followed by increase in the photoconversion efficiency, but rather that an optimal balance between electroactive surface area and charge carrier concentration occurs.…”

Section: Co-doping and Tri-dopingmentioning

confidence: 99%

Modified Titanium Dioxide for Photocatalytic Applications

Moma¹,

Baloyi²

2019

Photocatalysts - Applications and Attributes

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Titanium dioxide (TiO 2) has been widely used as a photocatalyst in many environmental and energy applications due to its efficient photoactivity, high stability, low cost, and safety to the environment and humans. However, its large band gap energy, ca. 3.2 eV limits its absorption of solar radiation to the UV light range which accounts for only about 5% of the solar spectrum. Furthermore, the photocatalytic activity of TiO 2 is also limited by the rapid recombination of the photogenerated electron-hole pairs. When used in water treatment applications, TiO 2 has a poor affinity toward organic pollutants, especially hydrophobic organic pollutants. Several strategies have been employed to reduce its band gap energy, its electron-hole recombination rates as well as enhance its absorption of organic pollutants. In this chapter, we review some of the most recent works that have employed the doping, decoration, and structural modification of TiO 2 particles for applications in photocatalysis. Additionally, we discuss the effectiveness of these dopants and/or modifiers in enhancing TiO 2 photoactivity as well as some perspective on the future of TiO 2 photocatalysis.

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Section: Co-doping and Tri-dopingmentioning

confidence: 99%

Modified Titanium Dioxide for Photocatalytic Applications

Moma¹,

Baloyi²

2019

Photocatalysts - Applications and Attributes

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“…Then, Mott‐Schottky analysis was carried out on the nanostructured SnS and SnS/ERGO in contact with the electrolyte, in order to study their semiconductor properties (flat band potential, E FB , and the apparent majority carrier density, N A ). However, as the film is formed by nanocrystals and nanostructures, a frequency dispersion of capacitance can be observed, making difficult the determination of these parameters . According with Dutoit et al .…”

Section: Resultsmentioning

confidence: 99%

Electrodeposition and Characterization of a Tin Sulfide‐Electrochemically Reduced Graphene Oxide Heterojunction

et al. 2019

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This work shows the formation of a heterojunction between tin (II) sulfide (SnS) and electrochemically reduced graphene oxide (ERGO), carried out through two electrochemical steps. In the first step, graphene oxide (GO) was electrochemically reduced on a fluorine-doped tin oxide (FTO) electrode. In the second step, the ERGO/FTO substrate was used as an electrode for the electrodeposition of SnS. In this study, each electrodeposited material (ERGO, SnS and SnS/ERGO heterojunction) was analyzed and characterized using different techniques, which confirmed the SnS/ERGO heterojunction formation. By employ-ing electrochemical impedance spectroscopy (EIS) and linear sweep photovoltammetry measurements, it was confirmed that SnS deposited in both, bare FTO and ERGO, is a p-type semiconductor. Furthermore, an improvement of the photocatalytic properties of the SnS/ERGO photocathode in comparison with the SnS film was observed. This effect is related to the ERGO interlayer between the SnS film and the FTO electrode, and the structural and morphology modification of the SnS film onto ERGO.

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“…The fabrication of doped TiO 2 nanotubes in the dopant material containing electrolytes has been studied by Chatzitakis et al They prepared C- and N-doped TiO 2 nanotubes in ethylene glycol containing small amounts of water and NH 4 F. Meanwhile, they considered the content of C and N species in the electrolyte solution as the contaminants. Consequently, the concentration of dopants was not controlled during the anodization process [ 66 ].…”

Section: Synthesis Of Porous Tio 2 Structuresmentioning

confidence: 99%

Porous TiO2-Based Gas Sensors for Cyber Chemical Systems to Provide Security and Medical Diagnosis

Galstyan

2017

Sensors

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Gas sensors play an important role in our life, providing control and security of technical processes, environment, transportation and healthcare. Consequently, the development of high performance gas sensor devices is the subject of intense research. TiO2, with its excellent physical and chemical properties, is a very attractive material for the fabrication of chemical sensors. Meanwhile, the emerging technologies are focused on the fabrication of more flexible and smart systems for precise monitoring and diagnosis in real-time. The proposed cyber chemical systems in this paper are based on the integration of cyber elements with the chemical sensor devices. These systems may have a crucial effect on the environmental and industrial safety, control of carriage of dangerous goods and medicine. This review highlights the recent developments on fabrication of porous TiO2-based chemical gas sensors for their application in cyber chemical system showing the convenience and feasibility of such a model to provide the security and to perform the diagnostics. The most of reports have demonstrated that the fabrication of doped, mixed and composite structures based on porous TiO2 may drastically improve its sensing performance. In addition, each component has its unique effect on the sensing properties of material.

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Assessing the photoelectrochemical properties of C, N, F codoped TiO 2 nanotubes of different lengths

Cited by 34 publications

References 48 publications

Modified Titanium Dioxide for Photocatalytic Applications

Modified Titanium Dioxide for Photocatalytic Applications

Electrodeposition and Characterization of a Tin Sulfide‐Electrochemically Reduced Graphene Oxide Heterojunction

Porous TiO2-Based Gas Sensors for Cyber Chemical Systems to Provide Security and Medical Diagnosis

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