Preparation, characterization and photocatalytic activity of Bi 2O3-MgO composites

Er Jun Li; Kai Xia; Shuang Feng Yin; Wei Li Dai; Sheng Lian Luo; Chak Tong Au

doi:10.1016/j.matchemphys.2010.09.013

Preparation, characterization and photocatalytic activity of Bi ₂O₃-MgO composites

Er Jun Li, Kai Xia, Shuang Feng Yin^*, Wei Li Dai, Sheng Lian Luo, Chak Tong Au

^*Corresponding author for this work

Department of Chemistry

Research output: Contribution to journal › Journal article › peer-review

43 Citations (Scopus)

Abstract

A series of Bi₂O₃-MgO composites were synthesized by solvent-thermal method. It was found that the Bi₂O₃-MgO composites perform much better than TiO₂ (P25), Bi₂O ₃ and MgO in the photocatalytic degradation of rhodamine B (RhB) in the presence of HCl and under irradiation of visible light (λ > 400 nm). The effects of Bi/Mg molar ratio, crystallization temperature of Bi ₂O₃-MgO and reaction conditions on photocatalytic activity were studied. The best performance was observed over the composite with Bi:Mg molar ratio equal to 2:1 that had been subject to crystallization at 120 °C for 20 h. In addition, the photocatalytic efficiency of the composite can be significantly enhanced by the presence of hydrochloric acid. The prepared samples were characterized by XRD and UV-vis DRS techniques. The relationships between the structure and photocatalytic performance of the as-prepared Bi ₂O₃-MgO samples were also investigated.

Original language	English
Pages (from-to)	236-241
Number of pages	6
Journal	Materials Chemistry and Physics
Volume	125
Issue number	1-2
DOIs	https://doi.org/10.1016/j.matchemphys.2010.09.013
Publication status	Published - 1 Jan 2011

Scopus Subject Areas

General Materials Science
Condensed Matter Physics

User-Defined Keywords

Bismuth oxide
Magnesium oxide
Photocatalyst
Visible light photodegradation

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10.1016/j.matchemphys.2010.09.013

Cite this

@article{16b95a817efb438fad0e56deefd82afc,

title = "Preparation, characterization and photocatalytic activity of Bi 2O3-MgO composites",

abstract = "A series of Bi2O3-MgO composites were synthesized by solvent-thermal method. It was found that the Bi2O3-MgO composites perform much better than TiO2 (P25), Bi2O 3 and MgO in the photocatalytic degradation of rhodamine B (RhB) in the presence of HCl and under irradiation of visible light (λ > 400 nm). The effects of Bi/Mg molar ratio, crystallization temperature of Bi 2O3-MgO and reaction conditions on photocatalytic activity were studied. The best performance was observed over the composite with Bi:Mg molar ratio equal to 2:1 that had been subject to crystallization at 120 °C for 20 h. In addition, the photocatalytic efficiency of the composite can be significantly enhanced by the presence of hydrochloric acid. The prepared samples were characterized by XRD and UV-vis DRS techniques. The relationships between the structure and photocatalytic performance of the as-prepared Bi 2O3-MgO samples were also investigated.",

keywords = "Bismuth oxide, Magnesium oxide, Photocatalyst, Visible light photodegradation",

author = "Li, {Er Jun} and Kai Xia and Yin, {Shuang Feng} and Dai, {Wei Li} and Luo, {Sheng Lian} and Au, {Chak Tong}",

note = "Funding Information: This project was financially supported by the National Natural Science Foundation of China ( 20873038, J0830415 ), Doctoral Program Foundation of Institutions of Higher Education of China (Grant No. 200805320001 ), Outstanding Young Research Award of National Natural Science Foundation of China (Grant No. E50725825 ), and National 863 Program of China ( 2009AA05Z319 ). C.T. Au thanks the Hunan University for an adjunct professorship.",

year = "2011",

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AU - Li, Er Jun

AU - Xia, Kai

AU - Yin, Shuang Feng

AU - Dai, Wei Li

AU - Luo, Sheng Lian

AU - Au, Chak Tong

N1 - Funding Information: This project was financially supported by the National Natural Science Foundation of China ( 20873038, J0830415 ), Doctoral Program Foundation of Institutions of Higher Education of China (Grant No. 200805320001 ), Outstanding Young Research Award of National Natural Science Foundation of China (Grant No. E50725825 ), and National 863 Program of China ( 2009AA05Z319 ). C.T. Au thanks the Hunan University for an adjunct professorship.

PY - 2011/1/1

Y1 - 2011/1/1

N2 - A series of Bi2O3-MgO composites were synthesized by solvent-thermal method. It was found that the Bi2O3-MgO composites perform much better than TiO2 (P25), Bi2O 3 and MgO in the photocatalytic degradation of rhodamine B (RhB) in the presence of HCl and under irradiation of visible light (λ > 400 nm). The effects of Bi/Mg molar ratio, crystallization temperature of Bi 2O3-MgO and reaction conditions on photocatalytic activity were studied. The best performance was observed over the composite with Bi:Mg molar ratio equal to 2:1 that had been subject to crystallization at 120 °C for 20 h. In addition, the photocatalytic efficiency of the composite can be significantly enhanced by the presence of hydrochloric acid. The prepared samples were characterized by XRD and UV-vis DRS techniques. The relationships between the structure and photocatalytic performance of the as-prepared Bi 2O3-MgO samples were also investigated.

AB - A series of Bi2O3-MgO composites were synthesized by solvent-thermal method. It was found that the Bi2O3-MgO composites perform much better than TiO2 (P25), Bi2O 3 and MgO in the photocatalytic degradation of rhodamine B (RhB) in the presence of HCl and under irradiation of visible light (λ > 400 nm). The effects of Bi/Mg molar ratio, crystallization temperature of Bi 2O3-MgO and reaction conditions on photocatalytic activity were studied. The best performance was observed over the composite with Bi:Mg molar ratio equal to 2:1 that had been subject to crystallization at 120 °C for 20 h. In addition, the photocatalytic efficiency of the composite can be significantly enhanced by the presence of hydrochloric acid. The prepared samples were characterized by XRD and UV-vis DRS techniques. The relationships between the structure and photocatalytic performance of the as-prepared Bi 2O3-MgO samples were also investigated.

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KW - Magnesium oxide

KW - Photocatalyst

KW - Visible light photodegradation

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