Fuentes, K.M.; Betancourt, P.; Marrero, S.; García, S."Photocatalytic degradation of phenol using doped titania supported on photonic SiO2 spheres" (2017) Reaction Kinetics, Mechanisms and Catalysis. 120(1):403-415
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The photocatalytic degradation of phenol in aqueous suspensions of co-doped TiO2supported on SiO2spheres was investigated. A novel photocatalyst was prepared combining iron doped TiO2–SiO2and reduced TiO2–SiO2by mechanical milling (MM/TiO2–SiO2). All the particles were characterized by BET. nitrogen adsorption, X-ray diffraction, scanning electron microscopy, UV–visible spectroscopy and elemental analysis. Trough XRD patterns it was calculated that 2 nm rutile crystallites were formed onto SiO2surface, ICP analysis confirmed Ti content near to nominal, while EDX analysis shows a surface content 10 lower, suggesting that the SiO2limiting the agglomeration of TiO2particles allowing a good dispersion. Phenol photodegradation was induced by illuminating the coated spheres in aqueous solution with a visible light source. The synthesized TiO2–SiO2particles appeared to be 1.3 times more efficient in the phenol conversion, as compared to pure rutile particles. According to characterization results, this improvement could be attributed mainly to three factors: an effective transference of charge carriers trough the grain boundaries present between contact points, a photonic behavior evidenced on an increment on UV–vis absorption intensity and the quantum size effect of rutile crystallites coated on SiO2. © 2016, Akadémiai Kiadó, Budapest, Hungary.


Documento: Artículo
Título:Photocatalytic degradation of phenol using doped titania supported on photonic SiO2 spheres
Autor:Fuentes, K.M.; Betancourt, P.; Marrero, S.; García, S.
Filiación:Departamento de Química Aplicada, Facultad de Ingeniería, Universidad Central de Venezuela, Caracas, 40679, Venezuela
INQUIMAE-DQIAQF, Facultad de Ciencias Exactas y Naturales, Universidad de Buenos Aires, Ciudad Universitaria, Pab. II, Buenos Aires, C1428EHA, Argentina
Laboratorio de Desarrollo de Procesos, Centro de Catálisis Petróleo y Petroquímica, Universidad Central de Venezuela, Caracas, Venezuela
Centro de Microscopía Electrónica, Facultad de Ingeniería, Universidad Central de Venezuela, Caracas, Venezuela
Palabras clave:Co-doped TiO2; Grain boundaries; Phenol degradation; Photonic SiO2spheres; Visible light; Crystallites; Doping (additives); Gas adsorption; Grain boundaries; Light; Light sources; Mechanical alloying; Milling (machining); Oxide minerals; Phenols; Scanning electron microscopy; Silica; Solutions; Suspensions (fluids); Titanium dioxide; X ray diffraction; Aqueous suspensions; Co-doped; Phenol degradation; Phenol photodegradation; Photo catalytic degradation; Quantum size effects; Visible light; Visible spectroscopy; Biodegradation
Página de inicio:403
Página de fin:415
Título revista:Reaction Kinetics, Mechanisms and Catalysis
Título revista abreviado:React. Kinet. Mech. Catal.


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---------- APA ----------
Fuentes, K.M., Betancourt, P., Marrero, S. & García, S. (2017) . Photocatalytic degradation of phenol using doped titania supported on photonic SiO2 spheres. Reaction Kinetics, Mechanisms and Catalysis, 120(1), 403-415.
---------- CHICAGO ----------
Fuentes, K.M., Betancourt, P., Marrero, S., García, S. "Photocatalytic degradation of phenol using doped titania supported on photonic SiO2 spheres" . Reaction Kinetics, Mechanisms and Catalysis 120, no. 1 (2017) : 403-415.
---------- MLA ----------
Fuentes, K.M., Betancourt, P., Marrero, S., García, S. "Photocatalytic degradation of phenol using doped titania supported on photonic SiO2 spheres" . Reaction Kinetics, Mechanisms and Catalysis, vol. 120, no. 1, 2017, pp. 403-415.
---------- VANCOUVER ----------
Fuentes, K.M., Betancourt, P., Marrero, S., García, S. Photocatalytic degradation of phenol using doped titania supported on photonic SiO2 spheres. React. Kinet. Mech. Catal. 2017;120(1):403-415.