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Preparation, characterization and photocatalytic studies of Cu2+, Sn2+ and N3− substituted K5Sb5P2O20

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Abstract

Potassium antimony phosphates (K-Sb-P-O) exhibit different structural networks and therefore they were studied as photocatalysts in the present investigation. K5Sb5P2O20 was prepared by solid state method. Metal ions (Cu2+ and Sn2+), and non-metal anion, N 3−, were substituted into the K5Sb5P2O20 for possible enhancement of photocatalytic activity. The precursor and substituted compounds were characterized by powder X-ray diffraction, FT-IR, SEM-EDS and UV-Vis diffuse reflectance spectra. Nitrogen substitution into K5Sb5P2O20 lattice was studied by O-N-H and XPS measurements. The photocatalytic activity of all the compounds was studied by degradation of methylene blue and methyl violet. The ion-substituted K5Sb5P2O20 have shown higher photocatalytic activity against both the dyes. The role of reactive intermediate species produced in the photocatalytic reaction was studied using their appropriate scavengers.

The red shift observed in the UV-Vis diffuse reflectance spectra of ion (Cu2+, Sn2+ and N3- ) substituted Potassium antimony phosphate (K5Sb5P2O20) indicate the mixing of Cu 3d, Sn 5s and N 2p orbitals with valence band O 2p orbital, which form (Cu 3d + O 2p), (Sn 5s + O 2p) and (N 2p + O 2p) hybrid orbitals, respectively. Higher photocatalytic activity was observed in the ion substituted materials.

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Acknowledgements

Authors would like to thank Department of Science & Technology (DST), New Delhi under FIST scheme and UGC, New Delhi under UPE programme.

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Authors and Affiliations

  1. Department of Chemistry, Osmania University, Hyderabad, 500 007, India

    CH SUDHAKAR REDDY, SREENU K, J R REDDY, RAVI GUNDEBOINA & M VITHAL

  2. Department of Chemistry, University College for Women, Koti, Osmania University, Hyderabad, 500 095, India

    A HARI PADMASRI

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  1. CH SUDHAKAR REDDY
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  2. SREENU K
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  4. A HARI PADMASRI
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Correspondence to M VITHAL.

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Supplementary Information (SI)

Figures S1 to S1 and tables S1 to S6 are available in electronic Supplementary Information available at http://www.ias.ac.in/Journals/Journal_of_Chemical_Sciences/.

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REDDY, C.S., K, S., REDDY, J.R. et al. Preparation, characterization and photocatalytic studies of Cu2+, Sn2+ and N3− substituted K5Sb5P2O20 . J Chem Sci 128, 663–670 (2016). https://doi.org/10.1007/s12039-016-1041-0

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  • DOI: https://doi.org/10.1007/s12039-016-1041-0

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