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Photoactivity properties of ZnO doped with cerium ions: an EPR study

Cerrato, Erik, Gionco, Chiara, Paganini, Maria Cristina and Giamello, Elio 2017. Photoactivity properties of ZnO doped with cerium ions: an EPR study. Journal of Physics: Condensed Matter 29 (44) , 444001. 10.1088/1361-648X/aa88f7

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In the present study, we investigated the effect of cerium doping in zinc oxide matrix, used as photoactive material. Cerium ions into the matrix of ZnO can act like a 'trap' for the electrons, lowering the e−/h+ recombination rate and so increasing the photocatalytic efficiency of the ZnO. We synthesised doped samples using a simple precipitation route. The amount of dopant used was, 1 and 10% molar. The samples have been studied via x-ray diffraction measurements for the structural characterisation; UV–visible diffuse reflectance was used for the optical analysis; Branauer–Emmett–Teller (BET) model for the measurement of the surface area. Finally, the samples have been analysed via electron paramagnetic resonance (EPR) spectroscopy for the electronic characterisation and for testing their photoactivity. The spin trapping technique was also use to measure the amount of stable radical adducts formed via reaction of OH• radicals with molecules of the DMPO (5,5-dimethyl-1-pyrroline-N-oxide) spin probe.

Item Type: Article
Date Type: Publication
Status: Published
Schools: Chemistry
Publisher: IOP Publishing: Hybrid Open Access
ISSN: 0953-8984
Date of Acceptance: 29 August 2017
Last Modified: 20 Oct 2021 01:14

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