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Photodeposition of silver on Zinc/Calcium ferrite nanoparticles: A contribution...
Fernandes, Ricardo Jorge Cunha; Magalhães, Carlos A. B.; Rodrigues, Ana Rita Oliveira; Almeida, B. G.; Pires, Ana; Pereira, André MiguelThe efficient photodegradation of textile dyes is still a challenge, especially considering resistant azo dyes. In this work, zinc/calcium mixed ferrite nanoparticles prepared by the sol-gel method were coupled with silver by a photodeposition method to enhance the photocatalytic potency. The obtained zinc/calcium ferrites are mainly cubic-shaped nanoparticles sized 15 ± 2 nm determined from TEM and XRD and an ...
Bi2Te3 and Sb2Te3 Thin Films with Enhanced Thermoelectric Properties for Flexib...
Vieira, Eliana Maria Fernandes; Figueira, Joana; Pires, Ana Lucia; Grilo, José; Silva, Manuel Fernando Ribeiro; Pereira, André Miguel; Gonçalves, L. M.The influence of substrate type in boosting thermoelectric properties of co-evaporated Bi2Te3 and Sb2Te3 films (with 400 nm-thick) is here reported. Optimized power factor values are 2.7 × 10<sup>−3</sup> W K<sup>−2</sup> m<sup>−1</sup> and 1.4 × 10<sup>−3</sup> W K<sup>−2</sup> m<sup>−1</sup> for flexible Bi2Te3 and Sb2Te3 films, respectively. This is an important result as it is at least 2 times higher than t...