Soft synthesis of Bi Doped and Bi–N co-doped TiO 2 nanocomposites: A comprehensive mechanistic approach towards visible light induced ultra-fast photocatalytic degradation of fabric dye pollutant

Thejaswini, T.V.L.; Prabhakaran, D.; Mohan, Akhila Maheswari

doi:10.1016/j.jece.2016.01.031

Cited by 22 publications

(8 citation statements)

References 51 publications

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“…Kawashita et al found excellent bactericidal activity against Escherichia coli with N-TiO 2 samples heated for 1 h and 3 h in an NH 3 atmosphere after 60 min of visible-light irradiation. In addition, doping with metal ions such as bismuth makes the lifetime of photoexcited charge carriers much longer, and bismuth oxide is a narrow-band-gap semiconductor, which could lead to a better photocatalytic efficiency . Bismuth is widely known for its nontoxic and low-cost characteristics with high photocatalytic and antibacterial potential. , A recent study reported that Bi-doped TiO 2 showed great antibacterial efficacy against A.…”

Section: Introductionmentioning

confidence: 99%

Visible-Light-Induced Photocatalytic and Antibacterial Activity of TiO₂ Codoped with Nitrogen and Bismuth: New Perspectives to Control Implant-Biofilm-Related Diseases

Nagay¹,

Dini²,

Cordeiro³

et al. 2019

ACS Appl. Mater. Interfaces

105

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Biofilm-associated diseases are one of the main causes of implant failure. Currently, the development of implant surface treatment goes beyond the osseointegration process and focuses on the creation of surfaces with antimicrobial action and with the possibility to be re-activated (i.e., light source activation). Titanium dioxide (TiO2), an excellent photocatalyst used for photocatalytic antibacterial applications, could be a great alternative, but its efficiency is limited to the ultraviolet (UV) range of the electromagnetic spectrum. Since UV radiation has carcinogenic potential, we created a functional TiO2 coating codoped with nitrogen and bismuth via the plasma electrolytic oxidation (PEO) of titanium to achieve an antibacterial effect under visible light with re-activation potential. A complex surface topography was demonstrated by scanning electron microscopy and three-dimensional confocal laser scanning microscopy. Additionally, PEO-treated surfaces showed greater hydrophilicity and albumin adsorption compared to control, untreated titanium. Bismuth incorporation shifted the band gap of TiO2 to the visible region and facilitated higher degradation of methyl orange (MO) in the dark, with a greater reduction in the concentration of MO after visible-light irradiation even after 72 h of aging. These results were consistent with the in vitro antibacterial effect, where samples with nitrogen and bismuth in their composition showed the greatest bacterial reduction after 24 h of dual-species biofilm formation (Streptococcus sanguinis and Actinomyces naeslundii) in darkness with a superior effect at 30 min of visible-light irradiation. In addition, such a coating presents reusable photocatalytic potential and good biocompatibility by presenting a noncytotoxicity effect on human gingival fibroblast cells. Therefore, nitrogen and bismuth incorporation into TiO2 via PEO can be considered a promising alternative for dental implant application with antibacterial properties in darkness, with a stronger effect after visible-light application.

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Section: Introductionmentioning

confidence: 99%

Visible-Light-Induced Photocatalytic and Antibacterial Activity of TiO₂ Codoped with Nitrogen and Bismuth: New Perspectives to Control Implant-Biofilm-Related Diseases

Nagay¹,

Dini²,

Cordeiro³

et al. 2019

ACS Appl. Mater. Interfaces

105

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“…Synergetic effects of interfaces between Bi2O3 and TiO2 were assumed to enhance the catalytic performance of the composite Bi/Ti-MCM-41. Co-doping with N has allowed narrowing the band gap energy of the photocatalysts resulting in greater visible light photocatalytic activity for the degradation of acid Red 85-a, a fabric dye (Thejaswini et al 2016). Co-doping with metal such as Zr and Si can affect anatase phase stability, crystallinity, particle size and optical properties of TiO2, resulting in enhanced photocatalytical activity in the photodegradation of methyl orange in aqueous solution under visible light (Ilkhechi et al 2014).…”

Section: Doping Of Tio2mentioning

confidence: 99%

Dyes Depollution of Water Using Porous TiO2-Based Photocatalysts

Lebeau

Jonas

Gaudin

et al. 2020

Environmental Chemistry for a Sustainable World

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“…2). In semiconductors, the band gap contains energy levels to which valence electrons cannot be promoted [14]. This band is much smaller in semiconductors than in non-conductors.…”

Section: Introductionmentioning

confidence: 99%

Advances in metal-based vanadate compound photocatalysts: synthesis, properties and applications

Akhoondi

Feleni

Bethi³

et al. 2021

Synth. Sinter.

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Among the ongoing research on photocatalysis under visible-light, it has been shown that doped or hybrid catalysts are more active than a single catalyst alone. However, problems including visible light absorption, a low quantity of energetic sites on surfaces, and rapid recombination of the photo-electron hole pair produced by light have prohibited photocatalysts from being used in a practical and widespread manner. To overcome these problems, synthesis of nanostructure hybrid catalyst using several methods has attracted much attention. Several procedures have been suggested for the preparation of photocatalysts with the desired structure and morphology. Preparation methods similar to partial modification may lead to diverse structures and qualities. In this regard, the development of efficient, low-cost photocatalysts and rapid synthesis is the most important issues that should be considered. This review discusses various methods and mechanisms that work with the modification of vanadium compounds as photocatalysts to progress their photocatalytic efficiency. In addition, the effects of synthesis temperature, solution pH and concentration on the photocatalytic performance are also described in detail.

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Soft synthesis of Bi Doped and Bi–N co-doped TiO 2 nanocomposites: A comprehensive mechanistic approach towards visible light induced ultra-fast photocatalytic degradation of fabric dye pollutant

Cited by 22 publications

References 51 publications

Visible-Light-Induced Photocatalytic and Antibacterial Activity of TiO₂ Codoped with Nitrogen and Bismuth: New Perspectives to Control Implant-Biofilm-Related Diseases

Visible-Light-Induced Photocatalytic and Antibacterial Activity of TiO₂ Codoped with Nitrogen and Bismuth: New Perspectives to Control Implant-Biofilm-Related Diseases

Dyes Depollution of Water Using Porous TiO2-Based Photocatalysts

Advances in metal-based vanadate compound photocatalysts: synthesis, properties and applications

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Soft synthesis of Bi Doped and Bi–N co-doped TiO 2 nanocomposites: A comprehensive mechanistic approach towards visible light induced ultra-fast photocatalytic degradation of fabric dye pollutant

Cited by 22 publications

References 51 publications

Visible-Light-Induced Photocatalytic and Antibacterial Activity of TiO2 Codoped with Nitrogen and Bismuth: New Perspectives to Control Implant-Biofilm-Related Diseases

Visible-Light-Induced Photocatalytic and Antibacterial Activity of TiO2 Codoped with Nitrogen and Bismuth: New Perspectives to Control Implant-Biofilm-Related Diseases

Dyes Depollution of Water Using Porous TiO2-Based Photocatalysts

Advances in metal-based vanadate compound photocatalysts: synthesis, properties and applications

Contact Info

Product

Resources

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Visible-Light-Induced Photocatalytic and Antibacterial Activity of TiO₂ Codoped with Nitrogen and Bismuth: New Perspectives to Control Implant-Biofilm-Related Diseases

Visible-Light-Induced Photocatalytic and Antibacterial Activity of TiO₂ Codoped with Nitrogen and Bismuth: New Perspectives to Control Implant-Biofilm-Related Diseases