Photo-induced Transformation, upon UV Illumination in Air, of Hyponitrite SpeciesN2O22- Preadsorbed onTiO2 Surface

Navı́o, J.A.; Cerrillos, C.; Real, C.

doi:10.1002/(sici)1096-9918(199605)24:5<355::aid-sia122>3.0.co;2-d

Cited by 55 publications

(36 citation statements)

References 19 publications

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“…Many reports had suggested that the signal at 400.0 eV was attributed to NO x species adsorbed on crystallite surface [49]. Sakthivel et al [50] and Navio et al [51] reported that the signal at around 400.0 eV was attributed to the presence of hyponitrite. Qiu et al assigned the signal at 400.0 eV to the nitrogen incorporated into the TiO 2 lattice [52].…”

Section: Resultsmentioning

confidence: 99%

Enhanced photocatalytic activity of C–N-codoped TiO2 films prepared via an organic-free approach

Wellia

Shi

et al. 2011

Journal of Hazardous Materials

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Section: Resultsmentioning

confidence: 99%

Enhanced photocatalytic activity of C–N-codoped TiO2 films prepared via an organic-free approach

Wellia

Shi

et al. 2011

Journal of Hazardous Materials

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“…The band at ∼1615 cm −1 corresponds to O-H bending of molecularly physisorbed H 2 O [18]. The IR band appearing at ∼1250 and ∼1550 cm −1 is assumed to be due to the nitrogen oxide species [45]. The absorption band at ∼1450 and ∼1042 cm −1 could be ascribed to the presence of unwanted NO 3 − groups and other residues, respectively [18,46].…”

Section: Resultsmentioning

confidence: 99%

Enhanced Catalytic Activity of Supported Gold Catalysts for Oxidation of Noxious Environmental Pollutant CO

Saikia

Miah

Malakar

et al. 2015

Indian Journal of Materials Science

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Noble metal nanomaterials have attracted mounting research attention for applications in diverse fields of catalysis, biology, and nanotechnology. In the present study, we have undertaken a detailed investigation on synthesis, characterization, and catalytic activity studies for CO oxidation by nanogold catalysts supported over CeO 2 and CeO 2 -ZrO 2 (1 : 1 mole ratio). The support systems were prepared by modified, simple precipitation technique and the Au supported samples were synthesized using depositionprecipitation with urea method. The physicochemical characterization was performed by XRD, ICP-AES, BET surface area, FT-IR, UV-Vis DRS, Raman Spectroscopy, TEM, and XPS techniques. Au/CeO 2 catalyst showed more than 80% CO conversions at 30 ∘ C, whereas Au/CeO 2 -ZrO 2 exhibited ∼100% CO conversion at that temperature. The catalytic performance of Au catalysts is highly dependent on the nature of the support.

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“…Zafra's results were consistent with Langmuir-Hinshelwood kinetics. Even nitrogen (N 2 ) can be fixed and oxidized on titania (rutile) surfaces [42,43]. The addition of titania thus leads to several effects which are disadvantageous for the photoreduction of nitrate: The transmittance of the reaction medium is reduced.…”

Section: Nitrate and Titaniamentioning

confidence: 99%

Photoinduced decomposition of nitrate in drinking water in the presence of titania and humic acids

Bems

Jentoft

Schlögl

1999

Applied Catalysis B: Environmental

108

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The photoreduction of nitrate in aqueous medium was investigated at 292 K in a batch system open to the ambient. Titania was tested as a photocatalyst and humic acids were added as promoters. Conversions of 28% were reached after 80 hours when a 44 mg/l nitrate solution was irradiated with a high pressure Xe-lamp; the major product was nitrite. The addition of humic acids (20 mg/l) promoted reduction of nitrate to nitrite but the mechanism of promotion could not be unambiguously identified. Titania (0.1 g/l) itself did not catalyze the photoreduction of nitrate but rather seemed to act as a catalyst for the reoxidation of nitrite to nitrate. The most successful system was a combination of 44 mg/l nitrate, 20 mg/l humic acids and 0.1 g/l Kronos-1002 titania: the nitrate conversion reached 32% after 76 hours, with little nitrite formed. Photocatalytic nitrate degradation is accompanied by homogeneous reduction to the more toxic nitrite; requiring any effective catalyst system to also reduce nitrite concentration.

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Photo-induced Transformation, upon UV Illumination in Air, of Hyponitrite SpeciesN2O22- Preadsorbed onTiO2 Surface

Cited by 55 publications

References 19 publications

Enhanced photocatalytic activity of C–N-codoped TiO2 films prepared via an organic-free approach

Enhanced photocatalytic activity of C–N-codoped TiO2 films prepared via an organic-free approach

Enhanced Catalytic Activity of Supported Gold Catalysts for Oxidation of Noxious Environmental Pollutant CO

Photoinduced decomposition of nitrate in drinking water in the presence of titania and humic acids

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