Journal of Materials Science: Materials in Electronics

, Volume 29, Issue 21, pp 18372–18379 | Cite as

Investigation of the physical properties of K2Co2(MoO4)3 for photocatalytic application

  • R. NasriEmail author
  • T. Larbi
  • M. Amlouk
  • M. F. Zid


In this contribution, potassium cobalt(II) molybdate K2Co2(MoO4)3 was synthesized by a solid-state reaction process. The morphology, the microstructure and the optical properties of the prepared compound have been studied by means of scanning probe microscopy, X-ray diffraction (XRD), FTIR and Raman spectroscopy respectively. Also, this material was studied by photoluminescence and UV–Vis spectroscopy. XRD analysis revealed that K2Co2(MoO4)3 crystallizes in the monoclinic system with P21/c space group and lattice parameters: a = 7.038(8) Å, b = 8.987(9) Å, c = 20.573(3) Å, β = 112.19(3)°, V = 1204.9(7) Å3 and Z = 4. This structure can be described by the presence of tetramers linked with each other by MoO4 tetrahedra giving a three-dimensional crystal structure containing channels in which K+ ions reside. Obtained Raman and IR lines were assigned to different normal vibration modes. The photoluminescence spectrum shows several peaks associated mainly with interstitials defects and oxygen vacancies due to a photoinduced charge carrier recombination. It is found that the rate of MB degradation is about 80% for xenon and UV (8 W) lights and it is of about 60% over sunlight during 2 h. This work suggests a good photocatalytic activity of K2Co2(MoO4)3, which may be of interest to develop a safe, cost-effective solar water treatment process.


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© Springer Science+Business Media, LLC, part of Springer Nature 2018

Authors and Affiliations

  1. 1.Université de Tunis El Manar, Laboratoire de Matériaux, Cristallochimie et Thermodynamique Appliquée, Faculté des Sciences de Tunis, El Manar IITunisTunisia
  2. 2.Unité de physique des dispositifs a semi-conducteurs, Faculté des Sciences de Tunis, El Manar IITunisTunisia
  3. 3.Université de Gafsa, Faculté des SciencesGafsaTunisia

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