Synergistic effect of upconversion, plasmonic and semiconducting properties of ternary nanocomposites for photocatalytic application under different light regions

Kumar, Ajay; Sharma, Manisha; Choudhary, Priyanka and Krishnan, Venkata (2023). Synergistic effect of upconversion, plasmonic and semiconducting properties of ternary nanocomposites for photocatalytic application under different light regions. Separation and Purification Technology, 304 p. 122368.

DOI: https://doi.org/10.1016/j.seppur.2022.122368

Abstract

The design of the efficient photocatalytic system with extended absorption of the broadband spectrum is the need of the hour. The synergistic effect of upconversion, plasmonic and semiconducting materials can significantly enhance the broadband absorption, and effective separation and transfer of charge carrier. In this work, a novel ternary plasmonic photocatalyst consisting of NaY_0.5Gd_0.5F₄:Yb/Tm@NaYb_0.5Gd_0.5F₄ core@shell (UCP), Au nanoparticles (Au NP) and N-ZnO has been prepared via hydrothermal synthesis route. The prepared nanocomposites are capable of harnessing ultraviolet (UV), visible (VIS) and near-infrared (NIR) light. The work specifically deals with the utilization of these ternary nanocomposites for photocatalytic elimination of tetracycline under UV, VIS and NIR light irradiations. The improved photocatalytic activity of the ternary plasmonic photocatalyst can be ascribed to the synergistic effect of all the components arranged systematically that favours harnessing of broadband spectrum for effective activation of charge carriers. Moreover, rational design and development of the UCNP/Au/N-ZnO photocatalyst shall pave the way for the fabrication of broadband absorption plasmonic photocatalysis.

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