Fluorine-Doped Titanium Dioxide: Synthesis, Structure, Morphology, Size and Photocatalytic Activity

Bayan, Е. М.; Лупейко, Т. Г.; Kolupaeva, Ekaterina V.; Pustovaya, L. E.; Федоренко, А. Г.

doi:10.1007/978-3-319-56062-5_2

Cited by 10 publications

(5 citation statements)

References 14 publications

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“…A general understanding is that the added fluoride during the synthesis of TiO 2 favors the selective formation of anatase‐phase TiO 2 and it can also stabilize the anatase phase upon annealing. [ 79–83 ]…”

Section: Effect Of Fluorine On the Structure Of Tio2mentioning

confidence: 99%

“…A general understanding is that the added fluoride during the synthesis of TiO 2 favors the selective formation of anatase-phase TiO 2 and it can also stabilize the anatase phase upon annealing. [79][80][81][82][83] This is mainly ascribed to the change of the surface chemical environment caused by fluoride, which affects the rearrangement of TiO 6 octahedra during the crystallization process and hinders surface nucleation of a second phase during the annealing process. [48,51,82] Besides, fluorine in TiO 2 can also tune its band structure and alter the localized electronic structures.…”

Section: Effect Of Fluorine On Other Structural Featuresmentioning

confidence: 99%

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Direct and Indirect Effects of Fluorine on the Photocatalytic Performance of Titania‐Based Photocatalysts

Schmuki

2023

Energy Tech

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TiO2 used as a light‐absorbing semiconductor represents the classic benchmark for photocatalytic solar energy conversion and many other photocatalytic reactions. Various strategies are developed to improve the photoresponse of TiO2‐based materials, such as bandgap engineering or surface sensitization in combination with nanostructuring and geometry optimization. The present feature article is focused on direct and indirect approaches involving bulk or surface fluorine used to tune the surface chemistry, electronic structure, and the morphology of TiO2 photocatalysts. A comprehensive overview is provided on fluorine effects on TiO2, involving morphology modifications, and how surface or bulk fluorine affect the photocatalytic performance of TiO2. After outlining some basic interaction principles of F and TiO2, characterization techniques for different fluorine species are discussed. It is reviewed how fluorine during crystal growth mediates the morphology of TiO2; then how surface fluorination and doping fluorine effects can be beneficially utilized in photocatalysis are discussed. Finally, synergistic effects between fluorine and cocatalyst are discussed, for example, the use of lattice fluorine species to stabilize Pt single‐atom cocatalysts. Finally, the challenges and outlook on further advancing the development of fluorine effects are highlighted.

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Section: Effect Of Fluorine On the Structure Of Tio2mentioning

confidence: 99%

Section: Effect Of Fluorine On Other Structural Featuresmentioning

confidence: 99%

Direct and Indirect Effects of Fluorine on the Photocatalytic Performance of Titania‐Based Photocatalysts

Schmuki

2023

Energy Tech

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“…Hydroxyl radicals are produced by the holes at the valence band during the reaction with water, and it may be used for the oxidation of organic compounds. As a dopant, Mn can perform as a hole or electron trap and change its 3d 5 electronic configuration (half-filled stable) to d 4 or d 6 , and this significantly improves the photocatalytic effectiveness [45]. To renovate its stable configuration, tapped electron moving to oxygen and trapped hole moving to adsorbed H 2 O molecules on the surface to produce hydroxyl (OH * ) and superoxide (O 2 − ) radicals.…”

Section: ( ) =mentioning

confidence: 99%

“…Furthermore, dopants can prevent electron-hole pair recombination, ensuing stability in photocatalytic reaction. The photoreactivity, interfacial electron transfer rates and charge carrier's recombination rates have been appreciably influenced by doping TiO 2 nanoparticles with metals and nonmetals [3][4][5][6]. To further improve the efficiency of photocatalysis of TiO 2 , co-doping by two kinds of atoms has attracted many research groups.…”

Section: Introductionmentioning

confidence: 99%

Antibacterial activities and photocatalyzed degradation of textile dyeing waste water by Mn and F co-doped TiO₂nanoparticles

Ancy¹,

Sarojini²,

Christy³

et al. 2022

Adv. Nat. Sci: Nanosci. Nanotechnol.

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In the present study, synthesis and characterisation of titanium dioxide (TiO2) nanoparticles concurrently doped with fluorine (F) and manganese (Mn) are studied for the improved photocatalytic degradation and bacterial inhibition. The absorption spectrum observed at 400 nm is blue shifted to 398 nm in co-doped TiO2, which confirmed the increase in incorporation of F and Mn. Transmission electron microscopic images and XRD results confirm that the size of the TiO2 nanoparticles decreased with increasing concentration of co-dopants. Co-doping of TiO2 with F and Mn is confirmed by FTIR, XRD, EDAX and XPS studies. The TiO2 nanoparticles prepared at higher concentration of dopants show the existence of nanorods. It is obvious that the doping of TiO2 with Mn and F can degrade textile wastewater and methylene blue with 120 min of visible light irradiation. The antimicrobial activities of the prepared samples increased with increasing doping level of F and Mn against Staphylococus aureaus and Escherichia coli.

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“…S. Jafari et al [20] reported that modified TiO 2 (N and S forms) nanoparticles showed visible light absorption capability for the removal of MB, as compared to unmodified TiO 2 . There are also numerous research works on other nonmetal-doped TiO 2 as an effective method to improve visible light photocatalytic activities, such as C-doping [21], F-doping [22] and S-doping [23]. Rutile Iodine-doped TiO 2 nanowires were reported to produce the highest methylene blue degradation under visible light excitation, compared to other synthesized non-metal doping nanomaterials, and the enhanced photocatalytic activity was attributed to existing oxygen vacancies, iodine multi-valences in I-O-Ti bonds, and 3d state Ti 3+ sites in the TiO 2 lattice [24].…”

Section: Introductionmentioning

confidence: 99%

Green Synthesis of Ag Nanoparticles for Plasmon-Assisted Photocatalytic Degradation of Methylene Blue

Tao

Bai

et al. 2021

Catalysts

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Green synthesis of metal nanoparticles has been gaining great interest due to the increasing need for eco-friendly manufacturing and application of nanomaterials. Metal nanoparticles, especially silver nanoparticles, are widely used in water treatments and as environmental remedy. Here we present a method to synthesize silver nanoparticles at room temperature using green tea extract under visible light irradiation, along with an application for enhanced photocatalytic degradation on methylene blue (MB) dye. Ag nanoparticles were synthesized under different photoreduction times and then further characterized. The photocatalytic rate of synthesized nanoparticles was also investigated and compared with TiO2 nanowires under UV and visible light irradiations. The results showed that Ag nanoparticles can directly degrade MB dye through plasmonic excitation and electron transferring under visible light, and Ag nanoparticles can further enhance TiO2 photonic degradation by enhanced e-h separation with UV and/or a wide band light, including UV light. Ag nanoparticles under visible light photoreduction for 0.5 h presented better behavior for two kinds of plasmonic enhanced photodegradation; the average size of the nanoparticles is about 30 nm. Therefore, the green synthesized Ag nanoparticles exhibit promising prospects in chemical and biological pollutant treatment.

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Fluorine-Doped Titanium Dioxide: Synthesis, Structure, Morphology, Size and Photocatalytic Activity

Cited by 10 publications

References 14 publications

Direct and Indirect Effects of Fluorine on the Photocatalytic Performance of Titania‐Based Photocatalysts

Direct and Indirect Effects of Fluorine on the Photocatalytic Performance of Titania‐Based Photocatalysts

Antibacterial activities and photocatalyzed degradation of textile dyeing waste water by Mn and F co-doped TiO₂nanoparticles

Green Synthesis of Ag Nanoparticles for Plasmon-Assisted Photocatalytic Degradation of Methylene Blue

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Fluorine-Doped Titanium Dioxide: Synthesis, Structure, Morphology, Size and Photocatalytic Activity

Cited by 10 publications

References 14 publications

Direct and Indirect Effects of Fluorine on the Photocatalytic Performance of Titania‐Based Photocatalysts

Direct and Indirect Effects of Fluorine on the Photocatalytic Performance of Titania‐Based Photocatalysts

Antibacterial activities and photocatalyzed degradation of textile dyeing waste water by Mn and F co-doped TiO2nanoparticles

Green Synthesis of Ag Nanoparticles for Plasmon-Assisted Photocatalytic Degradation of Methylene Blue

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Antibacterial activities and photocatalyzed degradation of textile dyeing waste water by Mn and F co-doped TiO₂nanoparticles