Citation: LIN Xue, Lü Peng, GUAN Qing-Feng, LI Hai-Bo, LI Hong-Ji, CAI Jie, ZOU Yang. Visible Light Photocatalytic Properties of Bi_3.25La_0.75Ti₃O₁₂ Nanowires[J]. Acta Physico-Chimica Sinica, ;2012, 28(08): 1978-1984. doi: 10.3866/PKU.WHXB201205172 shu

Visible Light Photocatalytic Properties of Bi_3.25La_0.75Ti₃O₁₂ Nanowires

LIN Xue ^1,2 ,
Lü Peng ¹ ,
GUAN Qing-Feng ^1, ,
LI Hai-Bo ³ ,
LI Hong-Ji ² ,
CAI Jie ¹ ,
ZOU Yang ¹

1.
1. School of Materials Science and Engineering, Jiangsu University, Zhenjiang 212013, Jiangsu Porvnce, P. R. China;
2. College of Chemistry, Key Laboratory of Preparation and Application Environmentally Friendly Materials of the Ministry of Education, Jilin Normal University, Siping 136000, Jilin Porvnce, P. R. China;
3. College of Physics, Jilin Normal University, Siping 136000, Jilin Porvnce, P. R. China

Received Date: 9 April 2012
Available Online: 17 May 2012
Fund Project:

Lanthanum-doped bismuth titanate (Bi_3.25La_0.75Ti₃O₁₂, BLT) nanowires were synthesized by a one-step hydrothermal process and their optical and photocatalytic properties were investigated. Their crystal structure and microstructures were characterized using X-ray diffraction (XRD), transmission electron microscopy (TEM), and high-resolution transmission electron microscopy (HRTEM). The BLT nanowires obtained are single-phase with an average diameter of 25 nm. The room temperature photoluminescence (PL) spectrum reveals two visible emission peaks at 400 and 596 nm, which are assigned to excitonic and surface-defect emissions, respectively. The UV-visible diffuse reflectance spectrum (UV-Vis DRS) reveals that the band gap of BLT nanowires is 2.07 eV. The prepared BLT nanowires are stable and exhibit higher photocatalytic activities in the degradation of methyl orange (MO) under visible light irradiation (λ >420 nm) compared with commercial P25 TiO₂, traditional N-doped TiO₂ (N-TiO₂), and pure bismuth titanate (Bi₄Ti₃O₁₂, BIT). The high photocatalytic performance of BLT photocatalysts is attributed to the strong visible light absorption and the recombination restraint of the e^-/h⁺ pairs resulting from the presence of La³⁺ ions.
- Bismuth titanate,
- Lanthanum doping,
- Nanowire,
- Hydrothermal synthesis,
- Photocatalytic degradation,
- Visible light irradiation
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Visible Light Photocatalytic Properties of Bi3.25La0.75Ti3O12 Nanowires

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Visible Light Photocatalytic Properties of Bi_3.25La_0.75Ti₃O₁₂ Nanowires