Photoluminescence of well-aligned ZnO doped CeO2 nanoplatelets by a solvothermal route

• The peak at 390 nm is the band-edge free exciton luminescence.
• Gas sensor based on CeO2 doped with Zn has shown a fast response.
• The increment of O defects localized between Ce4F and O2p energy levels.
• Zn, Ce and O atoms in suitable position of the cubic crystal system.
• The sensitivity of the present compound is more effective.

The nanocrystalline ZnO:CeO2 nanoplatelets have been prepared by solvothermal route synthesis and the materials are annealed at 450 ºC. The overall architectural change of crystal structure of pure and doped materials are analyzed by corresponding XRD patterns. From the XRD results, it is clear that the parent cubic structure is sustained during the formation of nanomaterial. In the case PL analysis it is found that, the PL spectrum is very much blue shifted which is purely due to the doping of ZnO on CeO2. The morphological investigation and energy-dispersive X-ray spectroscopy (EDX) analysis of ZnO doped CeO2 nanomaterials are characterized by Field emission scanning electron microscopy (FESEM). Sensing studies confirmed that the compounds were made up of CeO2 and ZnO bonds which implied that the prepared compounds are composed by CeO2 and ZnO. Further room temperature sensing properties were also investigated.

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