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Abstract:

Bi 2 WO 6 with different Bi 3+ ion concentrations (0-30 mol%) is incorporated with the ZnWO 4 photocatalyst to improve the photocatalytic efficiency by forming a ZnWO 4 /Bi 2 WO 6 composite photocatalyst with hierarchical heterostructure via a one-step hydrothermal method. X-ray diffraction and Raman spectroscopy analyses confirm the presence of ZnWO 4 and Bi 2 WO 6 as main phases in the composite photocatalyst. Scanning electron microscopy and transmission electron microscopy observations reveal that the rice- and plate-like Bi 2 WO 6 nanoparticles were either separate or attached to the surface of quasi-spherical ZnWO 4 particles. A gradual increase in the Bi 2 WO 6 content of the composite photocatalyst results in a monotonic shift of the absorption edge from ca. 355 nm to longer wavelengths up to ca. 450 nm. The photocatalytic performance of the ZnWO 4 /Bi 2 WO 6 composite photocatalyst was evaluated by investigating the degradation of gaseous acetaldehyde (AcH) under UV light irradiation. Only the composite photocatalyst synthesized with 30 mol% Bi 3+ exhibits higher photocatalytic activity under UV light irradiation compared with both individual ZnWO 4 and Bi 2 WO 6 , and with a mechanically mixed ZnWO 4 /Bi 2 WO 6 composite photocatalyst. The enhanced photocatalytic activity is attributed to the n-n isotype junction formed between the two semiconductors and the charge separation of each semiconductor. © 2013 Elsevier B.V.

Registro:

Documento: Artículo
Título:One-step hydrothermal synthesis and photocatalytic performance of ZnWO 4 /Bi 2 WO 6 composite photocatalysts for efficient degradation of acetaldehyde under UV light irradiation
Autor:Hojamberdiev, M.; Katsumata, K.-I.; Morita, K.; Bilmes, S.A.; Matsushita, N.; Okada, K.
Filiación:Materials and Structures Laboratory, Tokyo Institute of Technology, 4259 Nagatsuta, Midori, Yokohama, 226-8503 Kanagawa, Japan
Advanced Materials Processing Unit, Advanced Ceramics Group, National Institute for Materials Science, 1-2-1 Sengen, Tsukuba, 305-0047 Ibaraki, Japan
Instituto de Química Física de Los Materiales, Medio Ambiente y Energía (INQUIMAE), Ciudad Universitaria, C1428EHA-Buenos Aires, Argentina
Palabras clave:Bismuth tungstate; Composite photocatalyst; Heterostructure; Hydrothermal synthesis; UV light irradiation; Zinc tungstate; Bismuth tungstates; Composite photocatalysts; Degradation of acetaldehyde; Photocatalytic efficiency; Photocatalytic performance; Transmission electron microscopy observation; UV-light irradiation; Zinc tungstate; Acetaldehyde; Complexation; Heterojunctions; Hydrothermal synthesis; Irradiation; Photocatalysis; Raman spectroscopy; Scanning electron microscopy; Separation; Transmission electron microscopy; X ray diffraction; Photocatalysts
Año:2013
Volumen:457
Página de inicio:12
Página de fin:20
DOI: http://dx.doi.org/10.1016/j.apcata.2013.03.014
Título revista:Applied Catalysis A: General
Título revista abreviado:Appl Catal A Gen
ISSN:0926860X
CODEN:ACAGE
Registro:https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_0926860X_v457_n_p12_Hojamberdiev

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Citas:

---------- APA ----------
Hojamberdiev, M., Katsumata, K.-I., Morita, K., Bilmes, S.A., Matsushita, N. & Okada, K. (2013) . One-step hydrothermal synthesis and photocatalytic performance of ZnWO 4 /Bi 2 WO 6 composite photocatalysts for efficient degradation of acetaldehyde under UV light irradiation. Applied Catalysis A: General, 457, 12-20.
http://dx.doi.org/10.1016/j.apcata.2013.03.014
---------- CHICAGO ----------
Hojamberdiev, M., Katsumata, K.-I., Morita, K., Bilmes, S.A., Matsushita, N., Okada, K. "One-step hydrothermal synthesis and photocatalytic performance of ZnWO 4 /Bi 2 WO 6 composite photocatalysts for efficient degradation of acetaldehyde under UV light irradiation" . Applied Catalysis A: General 457 (2013) : 12-20.
http://dx.doi.org/10.1016/j.apcata.2013.03.014
---------- MLA ----------
Hojamberdiev, M., Katsumata, K.-I., Morita, K., Bilmes, S.A., Matsushita, N., Okada, K. "One-step hydrothermal synthesis and photocatalytic performance of ZnWO 4 /Bi 2 WO 6 composite photocatalysts for efficient degradation of acetaldehyde under UV light irradiation" . Applied Catalysis A: General, vol. 457, 2013, pp. 12-20.
http://dx.doi.org/10.1016/j.apcata.2013.03.014
---------- VANCOUVER ----------
Hojamberdiev, M., Katsumata, K.-I., Morita, K., Bilmes, S.A., Matsushita, N., Okada, K. One-step hydrothermal synthesis and photocatalytic performance of ZnWO 4 /Bi 2 WO 6 composite photocatalysts for efficient degradation of acetaldehyde under UV light irradiation. Appl Catal A Gen. 2013;457:12-20.
http://dx.doi.org/10.1016/j.apcata.2013.03.014