Ag-doped TiO2 photocatalysts with effective charge transfer for highly efficient hydrogen production through water splitting

Gogoi, Devipriya; Namdeo, Ashutosh; Golder, Animes Kumar; Peela, Nageswara Rao

doi:10.1016/j.ijhydene.2019.11.127

Cited by 187 publications

(62 citation statements)

References 88 publications

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“…The co-existence of metallic Ag and Ti–Ag–O species can trigger the SPR effect and form a new electron pathway for efficient electron–hole pair separation. 60 …”

Section: Solar-driven Uphill Reactions On Plasmonic Catalystsmentioning

confidence: 99%

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Plasmonic photothermal catalysis for solar-to-fuel conversion: current status and prospects

et al. 2021

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“…The co-existence of metallic Ag and Ti–Ag–O species can trigger the SPR effect and form a new electron pathway for efficient electron–hole pair separation. 60 …”

Section: Solar-driven Uphill Reactions On Plasmonic Catalystsmentioning

confidence: 99%

“…The H 2 generation from pure water was dramatically enhanced over Ag-modified TiO 2 (470 μmol h -1 g -1 ) in comparison to bare TiO 2 (206 μmol h -1 g -1 ) under UV light. The coexistence of metallic Ag and Ti-Ag-O species can trigger SPR effect and form new electron pathway for efficient electron-hole pair separation 60.…”

mentioning

confidence: 99%

Plasmonic photothermal catalysis for solar-to-fuel conversion: current status and prospects

et al. 2021

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“…Thus far, various scientific works have suggested different methods for semiconductor band gap reduction: anionic doping with nonmetals/metal ions/rare-earth ions [6][7][8], coupling with narrow-band gap semiconductors [9], plasma treatment [10], nanotube formation [11]. Naturally, band gap reduction methods have to be compatible with the selected TiO 2 synthesis techniques, and in some cases, particularly when immobilization on substrates is used, this might be challenging.…”

Section: Introductionmentioning

confidence: 99%

Photocatalytic Inactivation of Salmonella typhimurium by Floating Carbon-Doped TiO2 Photocatalyst

et al. 2021

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Photocatalysis application is considered as one of the most highly promising techniques for the reduction in wastewater pollution. However, the majority of highly efficient photocatalyst materials are obtained as fine powders, and this causes a lot of photocatalyst handling and reusability issues. The concept of the floating catalyst proposes the immobilization of a photocatalytic (nano)material on relatively large floating substrates and is considered as an encouraging way to overcome some of the most challenging photocatalysis issues. The purpose of this study is to examine floating photocatalyst application for Salmonella typhimurium bacteria inactivation in polluted water. More specifically, high-density polyethylene (HDPE) beads were used as a photocatalyst support for the immobilization of carbon-doped TiO2 films forming floating photocatalyst structures. Carbon-doped TiO2 films in both amorphous and anatase forms were deposited on HDPE beads using the low-temperature magnetron sputtering technique. Bacteria inactivation, together with cycling experiments, revealed promising results by decomposing more than 95% of Salmonella typhimurium bacteria in five consecutive treatment cycles. Additionally, a thorough analysis of the deposited carbon-doped TiO2 film was performed including morphology, elemental composition and mapping, structure, and depth profiling. The results demonstrate that the proposed method is a suitable technique for the formation of high-quality photocatalytic active films on thermal-sensitive substrates.

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“…TiO 2 property modification have been achieved by doping/co-doping metals and nonmetals in a TiO 2 crystal lattice [20]. Among all metals and non-metals, silver and nitrogen doping into a TiO 2 crystal lattice has shown great promise for visible light photocatalytic activity [14,21]. In this respect, silver doping narrows the band gap energy as shown via surface plasmon resonance (SPR).…”

Section: Introductionmentioning

confidence: 99%

Photocatalytic Conversion of Organic Pollutants in Air: Quantum Yields Using a Silver/Nitrogen/TiO2 Mesoporous Semiconductor under Visible Light

et al. 2021

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This research studies the photocatalytic conversion of methanol (25–90 µmol/L range) as a volatile organic compound (VOC) surrogate into CO2, using a N/Ag/TiO2 photocatalyst under visible light irradiation in a Photo-CREC Air unit. The N/Ag/TiO2 mesh supported photocatalyst is prepared via the solvothermal method. While the bare-TiO2 is inactive under visible light, the N/Ag/TiO2 2 wt.% loaded stainless-steel woven mesh displays 35% quantum yields, with 80% absorbed photons and 60% methanol conversion in a 110 min irradiation period. Results obtained are assigned to silver surface plasmon resonance, silver and nitrogen species synergistic impacts on band gap, and their influence on particle agglomerate size and semiconductor acidity. The determined quantum yields under visible light in a Photo-CREC Air unit, are the highest reported in the technical literature, that these authors are aware of, with this opening unique opportunity for the use of visible light for the purification of air from VOC contaminants.

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Ag-doped TiO2 photocatalysts with effective charge transfer for highly efficient hydrogen production through water splitting

Cited by 187 publications

References 88 publications

Plasmonic photothermal catalysis for solar-to-fuel conversion: current status and prospects

Plasmonic photothermal catalysis for solar-to-fuel conversion: current status and prospects

Photocatalytic Inactivation of Salmonella typhimurium by Floating Carbon-Doped TiO2 Photocatalyst

Photocatalytic Conversion of Organic Pollutants in Air: Quantum Yields Using a Silver/Nitrogen/TiO2 Mesoporous Semiconductor under Visible Light

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