Structural study, photoluminescence, and photocatalytic activity of semiconducting BaZrO3:Bi nanocrystals

R. Borja-Urby; L. A. Díaz-Torres; P. Salas; E. Moctezuma; M. Vega; C. Ángeles-Chávez

doi:10.1016/j.mseb.2011.01.024

Structural study, photoluminescence, and photocatalytic activity of semiconducting BaZrO₃:Bi nanocrystals

R. Borja-Urby, L. A. Díaz-Torres, P. Salas, E. Moctezuma, M. Vega, C. Ángeles-Chávez

Research output: Contribution to journal › Article › peer-review

37 Scopus citations

Abstract

Wide band gap nanocrystalline bismuth doped barium zirconate is synthesized by a facile hydrothermal method at 100 °C. The obtained cubic perovskites are characterized by powder X-ray diffraction (XRD), UV-VIS diffuse reflectance spectroscopy, photoluminescence (PL) spectroscopy, and photocatalytic activity. The estimated band gap in the 2.4-4.9 eV range, depending on Bi concentration, suggests nanocrystalline BaZrO₃:Bi as a useful visible-light activated photocatalyst under excitation wavelengths <800 nm. Displacement of main XRD pattern peaks suggest that bismuth ion mostly substitutes into Zr ⁴⁺ sites within the BaZrO₃ host lattice. It is found that BaZrO₃:Bi decomposes methylene blue (MB) under both UV and visible light irradiation. The photocatalyst efficiency depends strongly on Bi content and induced defects.

Original language	English
Pages (from-to)	1382-1387
Number of pages	6
Journal	Materials Science and Engineering B: Solid-State Materials for Advanced Technology
Volume	176
Issue number	17
DOIs	https://doi.org/10.1016/j.mseb.2011.01.024
State	Published - 25 Oct 2011
Externally published	Yes

Keywords

Barium zirconate
Bismuth
Nanocrystals
Photocatalyst

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10.1016/j.mseb.2011.01.024

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title = "Structural study, photoluminescence, and photocatalytic activity of semiconducting BaZrO3:Bi nanocrystals",

abstract = "Wide band gap nanocrystalline bismuth doped barium zirconate is synthesized by a facile hydrothermal method at 100 °C. The obtained cubic perovskites are characterized by powder X-ray diffraction (XRD), UV-VIS diffuse reflectance spectroscopy, photoluminescence (PL) spectroscopy, and photocatalytic activity. The estimated band gap in the 2.4-4.9 eV range, depending on Bi concentration, suggests nanocrystalline BaZrO3:Bi as a useful visible-light activated photocatalyst under excitation wavelengths <800 nm. Displacement of main XRD pattern peaks suggest that bismuth ion mostly substitutes into Zr 4+ sites within the BaZrO3 host lattice. It is found that BaZrO3:Bi decomposes methylene blue (MB) under both UV and visible light irradiation. The photocatalyst efficiency depends strongly on Bi content and induced defects.",

keywords = "Barium zirconate, Bismuth, Nanocrystals, Photocatalyst",

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note = "Funding Information: One of the authors, R. Borja-Urby, thanks to CONACyT for its support through a scholarship grant 173046 for PhD studies at Centro de Investigaciones en Optica A.C.",

year = "2011",

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doi = "10.1016/j.mseb.2011.01.024",

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AU - Borja-Urby, R.

AU - Díaz-Torres, L. A.

AU - Salas, P.

AU - Moctezuma, E.

AU - Vega, M.

AU - Ángeles-Chávez, C.

N1 - Funding Information: One of the authors, R. Borja-Urby, thanks to CONACyT for its support through a scholarship grant 173046 for PhD studies at Centro de Investigaciones en Optica A.C.

PY - 2011/10/25

Y1 - 2011/10/25

N2 - Wide band gap nanocrystalline bismuth doped barium zirconate is synthesized by a facile hydrothermal method at 100 °C. The obtained cubic perovskites are characterized by powder X-ray diffraction (XRD), UV-VIS diffuse reflectance spectroscopy, photoluminescence (PL) spectroscopy, and photocatalytic activity. The estimated band gap in the 2.4-4.9 eV range, depending on Bi concentration, suggests nanocrystalline BaZrO3:Bi as a useful visible-light activated photocatalyst under excitation wavelengths <800 nm. Displacement of main XRD pattern peaks suggest that bismuth ion mostly substitutes into Zr 4+ sites within the BaZrO3 host lattice. It is found that BaZrO3:Bi decomposes methylene blue (MB) under both UV and visible light irradiation. The photocatalyst efficiency depends strongly on Bi content and induced defects.

AB - Wide band gap nanocrystalline bismuth doped barium zirconate is synthesized by a facile hydrothermal method at 100 °C. The obtained cubic perovskites are characterized by powder X-ray diffraction (XRD), UV-VIS diffuse reflectance spectroscopy, photoluminescence (PL) spectroscopy, and photocatalytic activity. The estimated band gap in the 2.4-4.9 eV range, depending on Bi concentration, suggests nanocrystalline BaZrO3:Bi as a useful visible-light activated photocatalyst under excitation wavelengths <800 nm. Displacement of main XRD pattern peaks suggest that bismuth ion mostly substitutes into Zr 4+ sites within the BaZrO3 host lattice. It is found that BaZrO3:Bi decomposes methylene blue (MB) under both UV and visible light irradiation. The photocatalyst efficiency depends strongly on Bi content and induced defects.

KW - Barium zirconate

KW - Bismuth

KW - Nanocrystals

KW - Photocatalyst

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SN - 0921-5107

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JO - Materials Science and Engineering B: Solid-State Materials for Advanced Technology

JF - Materials Science and Engineering B: Solid-State Materials for Advanced Technology

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ER -

Structural study, photoluminescence, and photocatalytic activity of semiconducting BaZrO₃:Bi nanocrystals

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