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

Feng, Yao and Lai, Shuyi and Yang, Le and Riedel, Ralf and Yu, Zhaoju :
Polymer-derived porous Bi2WO6/SiC(O) ceramic nanocomposites with high photodegradation efficiency towards Rhodamine B.
[Online-Edition: https://doi.org/10.1016/j.ceramint.2018.02.061]
In: Ceramics International, 44 (7) pp. 8562-8569. ISSN 02728842
[Article] , (2018)

Official URL: https://doi.org/10.1016/j.ceramint.2018.02.061

Abstract

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.

Item Type: Article
Erschienen: 2018
Creators: Feng, Yao and Lai, Shuyi and Yang, Le and Riedel, Ralf and Yu, Zhaoju
Title: Polymer-derived porous Bi2WO6/SiC(O) ceramic nanocomposites with high photodegradation efficiency towards Rhodamine B
Language: English
Abstract:

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.

Journal or Publication Title: Ceramics International
Volume: 44
Number: 7
Publisher: Elsevier Science Publishing
Uncontrolled Keywords: Polymer derived ceramics, Ceramic nanocomposites, Porous ceramics, Photodegradation
Divisions: 11 Department of Materials and Earth Sciences
11 Department of Materials and Earth Sciences > Material Science
11 Department of Materials and Earth Sciences > Material Science > Dispersive Solids
Date Deposited: 07 Jun 2018 08:03
DOI: 10.1016/j.ceramint.2018.02.061
Official URL: https://doi.org/10.1016/j.ceramint.2018.02.061
Funders: Zhaoju Yu thanks Natural Science Foundation of Fujian Province of China (No. 2015J01221) and Creative Research Foundation of Science and Technology on Thermo structural Composite Materials Laboratory (No. 6142911040114) for financial support.
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