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PANI/Bi12TiO20 complex architectures: Controllable synthesis and enhanced visible-light photocatalytic activities

Paper ID Volume ID Publish Year Pages File Format Full-Text
46979 46454 2011 8 PDF Available
Title
PANI/Bi12TiO20 complex architectures: Controllable synthesis and enhanced visible-light photocatalytic activities
Abstract

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 > 420 nm). 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.

Graphical abstractBi12TiO20 and PANI/Bi12TiO20 complex architectures with flower-, spindle- and jujube-like shapes, were prepared through a facile template-free hydrothermal process with assistance of a simple chemisorption approach and the morphologies, growth mechanism and visible-light photocatalytic properties of these architectures were investigated.Figure optionsDownload full-size imageDownload as PowerPoint slideHighlights► Bi12TiO20 complex architectures (BiT) with flower-, spindle- and jujube-like shapes, were prepared through a facile template-free hydrothermal process. ► A possible growth mechanism for BiT architectures is proposed via an Ostwald ripening mechanism followed by self-assembly. ► Much high photocatalytic activities of BiT with 0.5% PANI were obtained for the degradation of RhB under visible-light irradiation. ► An enhanced photocatalytic performance for PANI/BiT architectures was also observed with the assistance of a small amount of H2O2.

Keywords
Photocatalytic activity; Bismuth titanate; Polyaniline; Degradation
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Publisher
Database: Elsevier - ScienceDirect
Journal: Applied Catalysis B: Environmental - Volume 104, Issues 3–4, 18 May 2011, Pages 399–406
Authors
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Subjects
Physical Sciences and Engineering Chemical Engineering Catalysis
Get Full-Text Now
Don't Miss Today's Special Offer
Price was $35.95
You save - $31
Price after discount Only $4.95
100% Money Back Guarantee
Full-text PDF Download
Online Support
Any Questions? feel free to contact us