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Synthesis and characterization of Ag3PO4/multiwalled carbon nanotube composite photocatalyst with enhanced photocatalytic activity and stability under visible light

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Abstract

A novel Ag3PO4/multiwalled carbon nanotube (Ag3PO4/MWCNT) composite has been prepared by a simple precipitant approach. The obtained samples were characterized by X-ray diffraction, scanning electron microscopy, energy-dispersive X-ray, UV–Vis diffuse reflectance, and Raman spectroscopy. It is found that the MWCNTs are well deposited on Ag3PO4 nanoparticles. The Ag3PO4/MWCNT composite with MWCNT content of 1.4 wt% exhibits optimal photocatalytic activity under visible light. The rate constant of MO degradation over Ag3PO4/1.4 wt% MWCNT is 5.84 times that of pure Ag3PO4. Compared with pure Ag3PO4, the incorporation of MWCNTs not only significantly enhances the photocatalytic activity but also improves the structural stability of Ag3PO4, suggesting that the synergistic effects take place in the composite. The improvement is attributed to the conductive structure supported by MWCNTs, which favors electron–hole separation and the removal of photogenerated electrons from the decorated Ag3PO4. A possible photocatalytic mechanism of the Ag3PO4/MWCNT photocatalyst was assumed as well.

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Acknowledgements

The authors genuinely appreciate the financial support of this work from Major Science and Technology Projects Focus on Social Development Projects of Zhejiang Province (2010C03003 and 2012C03004-1).

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Authors and Affiliations

  1. Department of Environmental Engineering, Zhejiang University, No. 38, Zhe Da Road, Hangzhou, 310027, Zhejiang, People’s Republic of China

    Zhen Wang, Lu Yin, Min Zhang, Guowang Zhou, Hui Fei, Huixiang Shi & Hongjun Dai

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  1. Zhen Wang
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  2. Lu Yin
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  3. Min Zhang
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  5. Hui Fei
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Correspondence to Huixiang Shi.

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Wang, Z., Yin, L., Zhang, M. et al. Synthesis and characterization of Ag3PO4/multiwalled carbon nanotube composite photocatalyst with enhanced photocatalytic activity and stability under visible light. J Mater Sci 49, 1585–1593 (2014). https://doi.org/10.1007/s10853-013-7841-4

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  • DOI: https://doi.org/10.1007/s10853-013-7841-4

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