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Combinations of N, P-type semiconductors and conductor (γ-Fe2O3, polypyrrole and silver) as different nanostructural nanocomposites for adsorptive and photocatalytic application

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Abstract

Several hetero-junction nanocomposites consisting of N- and P-type semiconductors and conductor (γ-Fe2O3, polypyrrole and silver) were prepared here by radical polymerization and redox method for adsorptive and photocatalytic applications. The obtained materials were characterized by means of X-ray diffraction, scanning electron microscopy, energy-dispersive X-ray spectroscopy, Infrared spectroscopy, and ultraviolet–visible absorption measurement. The results indicated that the average size of γ-Fe2O3 nanoparticles from all the samples is approximately 26.5 nm, the Ag nano-crystal with a average size of 19.2 nm attached on the interface of γ-Fe2O3 and the polypyrrole or polypyrrole surface and has good dispersivity. The adsorptive and photocatalytic activities of the above composites were studied before and after 2 h photodegradation of Methyl Orange and Orange II. Considering the adsorptive and photocatalytic performances as a whole, Fe2O3/polypyrrole composites based on the P–N-type hetero-junction exhibited the highest removal ability towards azo dyes compared with all the other as-prepared samples, and the total removal ratios towards Methyl Orange and Orange II were 84.3 and 92.6 %, respectively.

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Acknowledgments

This work was supported by the open research program of Engineering Research Center of Nano-Geomaterials of Ministry of Education, China University of Geosciences (CUGNGM201315). The Research Fund of Hubei provincial Department of Education, China (Q20121102) and open research program of Research Center of Green manufacturing, Energy-saving and emission-reduction, Wuhan University of Science and Technology (B1201) are also acknowledged.

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Authors and Affiliations

  1. College of Chemical Engineering and Technology, Wuhan University of Science and Technology, Wuhan, 430081, People’s Republic of China

    Yang Cheng, Fang Gao, Liang An, Xiaomin Li & Guanghui Wang

  2. Engineering Research Center of Nano-Geomaterials of Ministry of Education, China University of Geosciences, Wuhan, 430074, People’s Republic of China

    Yang Cheng

  3. College of Chemistry and pharmaceutical Sciences, Qingdao Agricultural University, Qingdao, 266109, People’s Republic of China

    Jing Lan

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  1. Yang Cheng
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  2. Fang Gao
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  3. Liang An
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  5. Xiaomin Li
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  6. Guanghui Wang
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Correspondence to Guanghui Wang.

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Cheng, Y., Gao, F., An, L. et al. Combinations of N, P-type semiconductors and conductor (γ-Fe2O3, polypyrrole and silver) as different nanostructural nanocomposites for adsorptive and photocatalytic application. Res Chem Intermed 41, 1741–1755 (2015). https://doi.org/10.1007/s11164-013-1308-8

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