Ullah, S. [UNESP]Ferreira-Neto, E. P. [UNESP]Hazra, C. [UNESP]Parveen, R.Rojas-Mantilla, H. D. [UNESP]Calegaro, M. L.Serge-Correales, Y. E. [UNESP]Rodrigues-Filho, U. P.Ribeiro, S. J.L. [UNESP]2019-10-062019-10-062019-04-01Applied Catalysis B: Environmental, v. 243, p. 121-135, 2019.0926-3373http://hdl.handle.net/11449/186986The development of photocatalysts responsive towards a broader region of the solar (UV-to-NIR) light is important for efficient harvesting of sunlight for photochemical and photoelectrical applications. In this study, two photocatalytic systems (BV/LEDs and BV/UCPs where UCPs stands for NaYbF4:Tm3+ upconversion particles) based on bismuth vanadate (BV) are introduced for photocatalytic degradation of both organic dyes (crystal violet, CV) and pharmaceuticals (sulfathiazole, STZ) under a variety of photoactivation modes including low-power (1.26 W) LEDs and near infrared (NIR) irradiation as well as natural sunlight. The BV/LEDs system makes use of the perfect match between the emission profile of commercial blue LEDs (460 ± 10 nm) and absorption profile of BV (Eg = 2.6 eV) to effectively photodegrade pollutants. The BV/UCPs system, on the other hand, exploits the NIR-to-UV/visible upconverted light from UCPs to allow photodegradation of pollutants under NIR illumination. Moreover, we present a detailed study of the experimental parameters to obtain BV particles with tailored morphology (spherical, rod-like, hyperbranched), crystalline phase (monoclinic, tetragonal or heterojunction biphasic BV) and band gap energy (2.4–2.9 eV). Depending on the phase composition, a synergetic effect in photoactivity is observed in samples containing around 68% monoclinic and 30% tetragonal BV which is ascribed to the formation of monoclinic/tetragonal heterojunction.121-135engBismuth vanadateHeterojunctionMicrowave-methodUpconversionUV–vis-NIR photocatalysisArtigo10.1016/j.apcatb.2018.09.091Acesso aberto2-s2.0-85055214518025391800480172443038027802167544692488228477706846807662747217564460474630346540000-0001-9931-690X0000-0002-9810-75640000-0002-9555-50460000-0003-3286-9440