TY - JOUR
T1 - PANI/Bi12TiO20 complex architectures
T2 - Controllable synthesis and enhanced visible-light photocatalytic activities
AU - Hou, Jungang
AU - Cao, Rui
AU - Jiao, Shuqiang
AU - Zhu, Hongmin
AU - Kumar, R. V.
N1 - Funding Information:
This work was supported by EPSRC , National Science Foundation of China (nos. 51004008 and 21071014 ), National Basic Research Program of China (973 Program, no. 2007CB613300 ), and the Program for Changjiang Scholars and Innovative Research Team in University (no. IRT0708 ).
PY - 2011/5/18
Y1 - 2011/5/18
N2 - Bi12TiO20 complex architectures (BiT) with flower-, spindle- and jujube-like shapes, were prepared through a facile template-free hydrothermal process, by controlling the reaction parameters, such as temperature, reagent concentration, and reaction time. Within the hydrothermal temperature range from 150 to 200°C, the morphology transformed progressively from microjujube to microflowers consisted with nanospindles. A possible growth mechanism for BiT architectures was proposed to explain the transformation of nanoparticles to microflowers via an Ostwald ripening mechanism followed by self-assembly. Most importantly, much higher photocatalytic activities of BiT spindle-like structures modified with 0.5% polyaniline (PANI) via a simple chemisorption approach in comparison with unmodified BiT were obtained for the degradation of Rhodamine B (RhB) solution under visible-light irradiation (λ>420nm). Furthermore, an enhanced photocatalytic performance for RhB degradation was also observed with the assistance of a small amount of H2O2. The reason could be ascribed to the synergic effect between PANI and BiT, which promoted the migration efficiency of photogenerated electron-hole on the interface of PANI and BiT, demonstrating that PANI/BiT architecture is a promising candidate as a visible light photocatalyst.
AB - Bi12TiO20 complex architectures (BiT) with flower-, spindle- and jujube-like shapes, were prepared through a facile template-free hydrothermal process, by controlling the reaction parameters, such as temperature, reagent concentration, and reaction time. Within the hydrothermal temperature range from 150 to 200°C, the morphology transformed progressively from microjujube to microflowers consisted with nanospindles. A possible growth mechanism for BiT architectures was proposed to explain the transformation of nanoparticles to microflowers via an Ostwald ripening mechanism followed by self-assembly. Most importantly, much higher photocatalytic activities of BiT spindle-like structures modified with 0.5% polyaniline (PANI) via a simple chemisorption approach in comparison with unmodified BiT were obtained for the degradation of Rhodamine B (RhB) solution under visible-light irradiation (λ>420nm). Furthermore, an enhanced photocatalytic performance for RhB degradation was also observed with the assistance of a small amount of H2O2. The reason could be ascribed to the synergic effect between PANI and BiT, which promoted the migration efficiency of photogenerated electron-hole on the interface of PANI and BiT, demonstrating that PANI/BiT architecture is a promising candidate as a visible light photocatalyst.
KW - Bismuth titanate
KW - Degradation
KW - Photocatalytic activity
KW - Polyaniline
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U2 - 10.1016/j.apcatb.2011.02.032
DO - 10.1016/j.apcatb.2011.02.032
M3 - Article
AN - SCOPUS:79955468157
VL - 104
SP - 399
EP - 406
JO - Applied Catalysis B: Environmental
JF - Applied Catalysis B: Environmental
SN - 0926-3373
IS - 3-4
ER -