Polymer-derived porous Bi2WO6/SiC(O) ceramic nanocomposites with high photodegradation efficiency towards Rhodamine B

Polymer-derived porous Bi2WO6/SiC(O) nanocomposites were prepared by a simple mechanical mixing of Bi2WO6 nanopowders with a polyorganocarbosilane, namely allylhydridopolycarbosilane (AHPCS), followed by pyrolysis of the resulting blend at 700 °C for 2 h. The Bi2WO6 nanopowders were synthesized by t...

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Bibliographic Details
Published in:Ceramics international 2018-05, Vol.44 (7), p.8562-8569
Main Authors: Feng, Yao, Lai, Shuyi, Yang, Le, Riedel, Ralf, Yu, Zhaoju
Format: Article
Language:English
Subjects:
Ceramic nanocomposites
Photodegradation
Polymer derived ceramics
Porous ceramics
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Summary:Polymer-derived porous Bi2WO6/SiC(O) nanocomposites were prepared by a simple mechanical mixing of Bi2WO6 nanopowders with a polyorganocarbosilane, namely allylhydridopolycarbosilane (AHPCS), followed by pyrolysis of the resulting blend at 700 °C for 2 h. The Bi2WO6 nanopowders were synthesized by the reaction between Bi(NO3)3·5H2O and Na2WO4 and characterized by means of X-ray diffraction (XRD) and dynamic light scattering (DLS). The cross-linking and polymer-to-ceramic transformation of the physically blended Bi2WO6/AHPCS were determined by Fourier transform infrared spectroscopy (FT-IR) and thermogravimetric analysis (TGA). TEM studies revealed that the final ceramic composite is comprised of Bi2WO6 nanoparticles homogeneously embedded in a polymer-derived SiC(O) matrix. Nitrogen sorption isothermal analysis showed the meso-macroporous feature of resultant Bi2WO6/SiC(O) nanocomposites. Finally, the porous Bi2WO6/SiC(O) composites show a high photodegradation efficiency (ca. 90%) towards a model organic dye Rhodamine B (RhB) under UV irradiation. Therefore, the synthesized ceramic composite has to be considered as a promising candidate material for purification of water contaminated with organic dyes.
ISSN:0272-8842
1873-3956
DOI:10.1016/j.ceramint.2018.02.061