Charge transfer between biogenic jarosite derived Fe 3+ and TiO 2 enhances visible light photocatalytic activity of TiO 2

Chowdhury, Mahabubur; Shoko, Sipiwe; Cummings, Fransciuos; Fester, Veruscha; Ojumu, Tunde Victor

doi:10.1016/j.jes.2015.11.038

Cited by 10 publications

(3 citation statements)

References 47 publications

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“…Moreover, the elevation of OH • radical was directly related to increasing photocatalytic efficiency due to the fact that H 2 O 2 exhibited self-dissociation, resulting in the OH • increase [24]. However, the rising of H 2 O 2 concentration did not impact the removal efficiency since its OH • radical scavenging effect could be explained as follows [25,26]:…”

Section: Photoefficiency Of Fe-doped Tiomentioning

confidence: 99%

“…Herein, its reusability over dye photodegradation was probably due to the formation of trapping sites by doping of Fe(III) into the TiO 2 lattice as previously discussed in the XPS section. Moreover, the emergence of this effect relied on the migration of photoactivated electrons from the binary Fe/TiO 2 heterojunction through the intimate interfacial contact between Fe(III) ions and Ti [26].…”

Section: Recyclabilitymentioning

confidence: 99%

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Potential effectiveness of visible-light-driven Fe/TiO2 photocatalysts for degradation of dyes contaminated wastewater and their antibacterial activity

Dechakiatkrai Theerakarunwong,

Kaewthet,

Phanichphant

2023

ScienceAsia

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Synthetic dyes are utilized across a variety of industries and pose potential threats to water quality which, adversely, affects human health and environment. Photocatalysis is an effective technique for degrading organic pollutants in wastewater by converting photons of light energy to chemical energy by using superior semiconducting materials. Herein, we emphasized the significance of wastewater treatment by using a visible-lightsensitive photocatalyst obtained by doping Fe into TiO 2 for achieving high removal efficiency. According to the experimental results, photodegradation rate of the dye by 80% of 3% wt. Fe-doped TiO 2 with 20% v/v H 2 O 2 addition was achieved in acidic media with three successive recycling runs. Moreover, total organic carbon (TOC) values indicated that the dye was nearly mineralized into CO 2 and water. This result may be related to the terephthalate (TPA) analysis, indicating that the amount of generated hydroxyl radicals increases via H 2 O 2 addition. In addition, preliminary toxicological study was conducted focusing on contamination of Ti particles in selected plants after exposure to treated water. The antibacterial efficiency of the selected photocatalyst was further tested against Gram-positive and Gramnegative pathogenic bacterial strains. The results revealed that 3% wt. Fe-doped TiO 2 was highly efficient in inactivating Escherichia coli and Staphylococcus aureus after 3 h under visible light illumination. Overall, our results provided an alternative for an inexpensive, non-toxic, stable, efficient, reusable, and excellent catalytic performance of 3% wt. Fe-doped TiO 2 photocatalyst materials with significant tasks remained for future study, including dye contaminated wastewater treatment, bacterial growth inhibition and simultaneously solar harvesting.

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Section: Photoefficiency Of Fe-doped Tiomentioning

confidence: 99%

Section: Recyclabilitymentioning

confidence: 99%

Potential effectiveness of visible-light-driven Fe/TiO2 photocatalysts for degradation of dyes contaminated wastewater and their antibacterial activity

Dechakiatkrai Theerakarunwong,

Kaewthet,

Phanichphant

2023

ScienceAsia

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“…Thus, how to reduce the recombination rate of photo generated electron–hole pairs and extend light response range of TiO 2 to visible light area especially NIR range is of great practical significance . Based on previous research, photocatalytic performance of TiO 2 nanotubes is much higher than that of pristine TiO 2 nanoparticles accounting for their high surface area, which not only provides a straight channel for the electronic transmission but also offers more opportunities for further modification . After high pressure gaseous reduction, plenty of Ti 3+ ions will present in the surface of TiO 2 .…”

Section: Introductionmentioning

confidence: 99%

Au Nanoclusters Sensitized Black TiO₂₋_x Nanotubes for Enhanced Photodynamic Therapy Driven by Near‐Infrared Light

Yang

Gulzar

Yang

et al. 2017

Small

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The low reactive oxygen species production capability and the shallow tissue penetration of excited light (UV) are still two barriers in photodynamic therapy (PDT). Here, Au cluster anchored black anatase TiO nanotubes (abbreviated as Au /B-TiO NTs) are synthesized by gaseous reduction of anatase TiO NTs and subsequent deposition of noble metal. The Au /B-TiO NTs with thickness of about 2 nm exhibit excellent PDT performance. The reduction process increased the density of Ti on the surface of TiO , which effectively depresses the recombination of electron and hole. Furthermore, after modification of Au nanoclusters, the PDT efficiency is further enhanced owing to the changed electrical distribution in the composite, which forms a shallow potential well on the metal-TiO interface to further hamper the recombination of electron and hole. Especially, the reduction of anatase TiO can expend the light response range (UV) of TiO to the visible and even near infrared (NIR) light region with high tissue penetration depth. When excited by NIR light, the nanoplatform shows markedly improved therapeutic efficacy attributed to the photocatalytic synergistic effect, and promotes separation or restrained recombination of electron and hole, which is verified by experimental results in vitro and in vivo.

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Biogenic metal nanoparticles with microbes and their applications in water treatment: a review

Zhang

et al. 2021

Environ Sci Pollut Res

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Charge transfer between biogenic jarosite derived Fe 3+ and TiO 2 enhances visible light photocatalytic activity of TiO 2

Cited by 10 publications

References 47 publications

Potential effectiveness of visible-light-driven Fe/TiO2 photocatalysts for degradation of dyes contaminated wastewater and their antibacterial activity

Potential effectiveness of visible-light-driven Fe/TiO2 photocatalysts for degradation of dyes contaminated wastewater and their antibacterial activity

Au Nanoclusters Sensitized Black TiO₂₋_x Nanotubes for Enhanced Photodynamic Therapy Driven by Near‐Infrared Light

Biogenic metal nanoparticles with microbes and their applications in water treatment: a review

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Charge transfer between biogenic jarosite derived Fe 3+ and TiO 2 enhances visible light photocatalytic activity of TiO 2

Cited by 10 publications

References 47 publications

Potential effectiveness of visible-light-driven Fe/TiO2 photocatalysts for degradation of dyes contaminated wastewater and their antibacterial activity

Potential effectiveness of visible-light-driven Fe/TiO2 photocatalysts for degradation of dyes contaminated wastewater and their antibacterial activity

Au Nanoclusters Sensitized Black TiO2−x Nanotubes for Enhanced Photodynamic Therapy Driven by Near‐Infrared Light

Biogenic metal nanoparticles with microbes and their applications in water treatment: a review

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Au Nanoclusters Sensitized Black TiO₂₋_x Nanotubes for Enhanced Photodynamic Therapy Driven by Near‐Infrared Light