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Abstract:

Novel porous β-Bi 2 O 3 /Bi 2 O 2 CO 3 p-n heterostructures were synthesized by partially decomposing porous Bi 2 O 2 CO 3 at 300-375 °C. The structures, morphologies, optical properties, and specific surface areas of the as-synthesized samples were characterized by means of thermogravimetry and differential scanning calorimetry, X-ray diffraction, scanning electron microscopy, UV-Vis spectroscopy, and N 2 gas adsorption. Two types of dyes, methyl orange (MO) and methylene blue (MB), were chosen as model organic pollutants to evaluate the photocatalytic activity of the as-synthesized samples. The porous β-Bi 2 O 3 /Bi 2 O 2 CO 3 p-n heterostructures exhibited much higher photocatalytic activity than β-Bi 2 O 3 and Bi 2 O 2 CO 3 and MO and MB could be completely degraded within 24 and 50 min, respectively. In addition, phenol as a colorless organic pollutant was also chosen to further study the photocatalytic activity of Bi 2 O 2 CO 3 , β-Bi 2 O 3 and β-Bi 2 O 3 /Bi 2 O 2 CO 3 . The β-Bi 2 O 3 /Bi 2 O 2 CO 3 heterostructures also showed much higher photocatalytic activity for the photodegradation of phenol than β-Bi 2 O 3 and Bi 2 O 2 CO 3 . The obtained results indicated that the formed p-n heterojunction in the porous β-Bi 2 O 3 /Bi 2 O 2 CO 3 composite significantly contributed to the improvement of electron-hole separation and the enhancement of photocatalytic activity. The mechanisms for the enhanced photodegradation of selected organic pollutants over the β-Bi 2 O 3 /Bi 2 O 2 CO 3 composite are discussed in this study. © The Royal Society of Chemistry and the Centre National de la Recherche Scientifique.

Registro:

Documento: Artículo
Título:Thermodecomposition synthesis of porous β-Bi 2 O 3 /Bi 2 O 2 CO 3 heterostructured photocatalysts with improved visible light photocatalytic activity
Autor:Zhu, G.; Liu, Y.; Hojamberdiev, M.; Han, J.; Rodríguez, J.; Bilmes, S.A.; Liu, P.
Filiación:School of Physics and Information Technology, Shaanxi Normal University, Xi'an, 710062, China
Department of Natural and Mathematic Sciences, Turin Polytechnic University in Tashkent, Kichik Halqa Yo'li 17Tashkent 100095, Uzbekistan
Facultad de Ciencias, Universidad Nacional de Ingeniería, P.O. Box 31-139, Av. Tupac Amaru 210, Lima 31, Peru
Instituto de Química Física de los Materiales, Medio Ambiente y Energía (INQUIMAE), Facultad de Ciencias Exactas y Naturales, Universidad de Buenos Aires, Pabellón II, Ciudad UniversitariaBuenos Aires C1428EHA, Argentina
Palabras clave:methyl orange; methylene blue; phenol; absorption; adsorption; Article; catalysis; catalyst; chemical model; chemical structure; crystal structure; decomposition; differential scanning calorimetry; electrochemical analysis; light; molecular mechanics; photodegradation; pollutant; priority journal; scanning electron microscopy; surface area; synthesis; temperature dependence; thermal analysis; thermogravimetry; ultraviolet spectroscopy; X ray diffraction; X ray photoelectron spectroscopy
Año:2015
Volumen:39
Número:12
Página de inicio:9557
Página de fin:9568
DOI: http://dx.doi.org/10.1039/c5nj01462j
Título revista:New Journal of Chemistry
Título revista abreviado:New J. Chem.
ISSN:11440546
CODEN:NJCHE
CAS:methyl orange, 547-58-0; methylene blue, 61-73-4; phenol, 108-95-2, 3229-70-7
Registro:https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_11440546_v39_n12_p9557_Zhu

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Citas:

---------- APA ----------
Zhu, G., Liu, Y., Hojamberdiev, M., Han, J., Rodríguez, J., Bilmes, S.A. & Liu, P. (2015) . Thermodecomposition synthesis of porous β-Bi 2 O 3 /Bi 2 O 2 CO 3 heterostructured photocatalysts with improved visible light photocatalytic activity. New Journal of Chemistry, 39(12), 9557-9568.
http://dx.doi.org/10.1039/c5nj01462j
---------- CHICAGO ----------
Zhu, G., Liu, Y., Hojamberdiev, M., Han, J., Rodríguez, J., Bilmes, S.A., et al. "Thermodecomposition synthesis of porous β-Bi 2 O 3 /Bi 2 O 2 CO 3 heterostructured photocatalysts with improved visible light photocatalytic activity" . New Journal of Chemistry 39, no. 12 (2015) : 9557-9568.
http://dx.doi.org/10.1039/c5nj01462j
---------- MLA ----------
Zhu, G., Liu, Y., Hojamberdiev, M., Han, J., Rodríguez, J., Bilmes, S.A., et al. "Thermodecomposition synthesis of porous β-Bi 2 O 3 /Bi 2 O 2 CO 3 heterostructured photocatalysts with improved visible light photocatalytic activity" . New Journal of Chemistry, vol. 39, no. 12, 2015, pp. 9557-9568.
http://dx.doi.org/10.1039/c5nj01462j
---------- VANCOUVER ----------
Zhu, G., Liu, Y., Hojamberdiev, M., Han, J., Rodríguez, J., Bilmes, S.A., et al. Thermodecomposition synthesis of porous β-Bi 2 O 3 /Bi 2 O 2 CO 3 heterostructured photocatalysts with improved visible light photocatalytic activity. New J. Chem. 2015;39(12):9557-9568.
http://dx.doi.org/10.1039/c5nj01462j