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One-pot synthesis of visible-light-driven Ag/Ag3PO4 photocatalyst immobilized on exfoliated montmorillonite by clay-mediated in situ reduction

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Abstract

In order to find efficient photocatalytic materials and convenient preparation method, a well-designed Ag/Ag3PO4–OMMT (organically modified montmorillonite) plasmonic photocatalyst was synthesized via the “one-pot” process without any reducing species. Ag+ could be reduced by Si–OH moiety on the surface of OMMT. The resulting samples were thoroughly studied by using X-ray diffraction, X-ray photoelectron spectra, transmission electron microscopy, scanning electron microscope, energy-dispersive X-ray spectroscopy, UV–Vis diffuse reflectance spectra, and so on. The as-prepared Ag/Ag3PO4–OMMT photocatalyst exhibited efficient, stable photocatalytic activity and recyclability for the degradation of Rhodamine B (RhB) under visible light radiation (λ > 420 nm). The optimum synergetic effect of Ag3PO4/OMMT was found at a weight ratio of 50 %. The degradation efficiency of RhB over Ag/Ag3PO4–OMMT (1:1) was about 92.9 %, and photocatalytic activity remained stable after three cycles. The results show that the designed photocatalyst is feasible and effective. The proposed photocatalysis mechanism is probably attributed to surface plasmon resonance of metallic Ag nanoparticles (NPs) and also attributed to negatively charged exfoliated montmorillonite. The Ag/Ag3PO4–OMMT composites showed highly visible light photocatalytic activity, which makes them promising nanomaterials for further applications in water treatment.

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Acknowledgments

This work was supported financially by funding from the National Natural Science Foundation of China (21367022) and Program for Tackling Key Problems in Science and Technology of Shihezi University (GYJS2014-ZDGG01).

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Authors and Affiliations

  1. School of Chemistry and Chemical Engineering, Shihezi University, Beisi Road, Shihezi City, 832003, Xinjiang, People’s Republic of China

    Chang Liu, Xiaoyuan Zhang, Jianning Wu, Guihua Meng, Xuhong Guo & Zhiyong Liu

  2. Key Laboratory for Green Processing of Chemical Engineering of Xinjiang Bingtuan, Engineering Research Center of Materials-Oriented Chemical Engineering of Xinjiang Bingtuan, Shihezi City, 832003, Xinjiang, People’s Republic of China

    Jianning Wu, Guihua Meng, Xuhong Guo & Zhiyong Liu

  3. Key Laboratory of Materials-Oriented Chemical Engineering of Xinjiang Uygur Autonomous Region, Engineering Research Center of Materials-Oriented Chemical Engineering of Xinjiang Bingtuan, Shihezi, 832003, Xinjiang, People’s Republic of China

    Jianning Wu, Guihua Meng, Xuhong Guo & Zhiyong Liu

Authors
  1. Chang Liu
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  2. Xiaoyuan Zhang
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  3. Jianning Wu
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  4. Guihua Meng
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Correspondence to Zhiyong Liu.

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Liu, C., Zhang, X., Wu, J. et al. One-pot synthesis of visible-light-driven Ag/Ag3PO4 photocatalyst immobilized on exfoliated montmorillonite by clay-mediated in situ reduction. Appl. Phys. A 122, 946 (2016). https://doi.org/10.1007/s00339-016-0479-8

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