Abstract:
Direct evidence is presented that the otherwise thermodynamically forbidden reduction of As(V) by conduction band electrons of the semiconductor can be driven in the dark by accumulated electrons stored in alcoholic TiO2 nanoparticles. Accumulation of electrons and participation in As(V) reduction was directly followed by UV-vis spectrophotometry and by Electron Paramagnetic Resonance, detected as Ti(III) species. © 2014 Taylor & Francis Group.
Registro:
| Documento: |
Conferencia
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| Título: | Dark reduction of As(V) by accumulated electrons stored in alcoholic TiO2 nanoparticles |
| Autor: | Levy, I.K.; Quici, N.; Custo, G.; Litter, M.I.; Brusa, M.; Aguirre, M.E.; Grela, M.A.; San Román, E.; et al.; National Atomic Energy Commission (CNEA); National Research and Technology Council (CONICET); The Argentine Foundation of Nanotechnology; The National University of Buenos Aires (UBA); The National University of San Martin (UNSAM) |
| Ciudad: | Buenos Aires |
| Filiación: | Gerencia Química, Comisión Nacional de Energía Atómica, San Martín, Prov. de Buenos Aires, Argentina
Departamento de Química, Facultad de Ciencias Exactas Y Naturales, Universidad Nacional de Mar del Plata, Prov. de Buenos Aires, Argentina
INQUIMAE, Facultad de Ciencias Exactas Y Naturales, Universidad de Buenos Aires, Argentina
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| Palabras clave: | Arsenic; Magnetic resonance; Nanoparticles; Conduction band electrons; TiO; TiO2 nano-particles; UV-vis spectrophotometry; Electrons |
| Año: | 2014
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| Página de inicio: | 802
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| Página de fin: | 804
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| Título revista: | 5th International Congress on Arsenic in the Environment, As 2014
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| Título revista abreviado: | One Century Discov. Arsenicosis Latin America: As - Proc. Int. Congr. Arsenic Environ.
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| Registro: | https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_97811380_v_n_p802_Levy |
Referencias:
- Di Iorio, Y., San Román, E., Litter, M.I., Grela, M.A., Photoinduced reactivity of strongly coupled TiO2 ligands under visible irradiation: An examination of an alizarin red@TiO2 nanoparticulate system (2008) J. Phys. Chem. C, 112, pp. 16532-16538
- Di Iorio, Y.D., Aguirre, M.E., Brusa, M.A., Grela, M.A., Surface chemistry determines electron storage capabilities in alcoholic sols of titanium dioxide nanoparticles. A combined FTIR and room temperature EPR investigation (2012) J. Phys. Chem. C, 116, pp. 9646-9652
- Duonghong, D., Ramsden, J., Grätzel, M., Dynamics of interfacial electron-transfer processes in colloidal semiconductor systems (1982) J. Am. Chem. Soc., 104, pp. 2977-2985
- Juvonen, R., Parviainen, A., Loukola-Ruskeeniemi, K., Evaluation of a total reflection X-ray fluorescence spectrometer in the determination of arsenic and trace metals in environmental samples (2009) Geochem. Explor. Environ. Anal., 9, pp. 173-178
- Kamat, P.V., Bedja, I., Hotchandani, S., Photo-induced charge transfer between carbon and semiconductor clusters. One-electron reduction of C60 in colloidal TiO2 semiconductor suspensions (1994) J. Phys. Chem., 98, pp. 9137-9142
- Kläning, U.K., Bielski, B.H.J., Sehesteds, K., Arsenic(IV). A pulse-radiolysis study (1989) Inorg. Chem., 28, pp. 2717-2724
- Kormann, C., Bahnemann, D.W., Hoffmann, M.R., Preparation and characterization of quantumsize titanium dioxide (1988) J. Phys. Chem., 92, pp. 5196-5201
- Lenoble, V., Deluchat, V., Serpaud, B., Bollinger, J.-C., Arsenite oxidation and arsenate determination by the molybdene blue method (2003) Talanta, 61, pp. 267-276
- Levy, I.K., Mizrahi, M., Ruano, G., Zampieri, G., Requejo, F.G., Litter, M.I., TiO2-photocatalytic reduction of pentavalent and trivalent arsenic: Production of elemental arsenic and arsine (2012) Environ. Sci. Technol., 46, pp. 2299-2308
- Levy, I.K., Brusa, M.A., Aguirre, M.E., Custo, G., San Román, E., Litter, M.I., Grela, M.A., Exploiting electron storage in TiO2 nanoparticles for dark reduction of As(V) by accumulated electrons (2013) Phys. Chem. Chem. Phys., 15, pp. 10335-10338A4 - et al.; National Atomic Energy Commission (CNEA); National Research and Technology Council (CONICET); The Argentine Foundation of Nanotechnology; The National University of Buenos Aires (UBA); The National University of San Martin (UNSAM)
Citas:
---------- APA ----------
Levy, I.K., Quici, N., Custo, G., Litter, M.I., Brusa, M., Aguirre, M.E., Grela, M.A.,..., et al.; National Atomic Energy Commission (CNEA); National Research and Technology Council (CONICET); The Argentine Foundation of Nanotechnology; The National University of Buenos Aires (UBA); The National University of San Martin (UNSAM)
(2014)
. Dark reduction of As(V) by accumulated electrons stored in alcoholic TiO2 nanoparticles. 5th International Congress on Arsenic in the Environment, As 2014, 802-804.
Recuperado de https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_97811380_v_n_p802_Levy [ ]
---------- CHICAGO ----------
Levy, I.K., Quici, N., Custo, G., Litter, M.I., Brusa, M., Aguirre, M.E., et al.
"Dark reduction of As(V) by accumulated electrons stored in alcoholic TiO2 nanoparticles"
. 5th International Congress on Arsenic in the Environment, As 2014
(2014) : 802-804.
Recuperado de https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_97811380_v_n_p802_Levy [ ]
---------- MLA ----------
Levy, I.K., Quici, N., Custo, G., Litter, M.I., Brusa, M., Aguirre, M.E., et al.
"Dark reduction of As(V) by accumulated electrons stored in alcoholic TiO2 nanoparticles"
. 5th International Congress on Arsenic in the Environment, As 2014, 2014, pp. 802-804.
Recuperado de https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_97811380_v_n_p802_Levy [ ]
---------- VANCOUVER ----------
Levy, I.K., Quici, N., Custo, G., Litter, M.I., Brusa, M., Aguirre, M.E., et al. Dark reduction of As(V) by accumulated electrons stored in alcoholic TiO2 nanoparticles. One Century Discov. Arsenicosis Latin America: As - Proc. Int. Congr. Arsenic Environ. 2014:802-804.
Available from: https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_97811380_v_n_p802_Levy [ ]
