Photo-anodes based on B-doped TiO2 for photoelectrocatalytic degradation of propyphenazone

dc.creatorSILVA, THALITA F. da
dc.creatorCAVALCANTE, RODRIGO P.
dc.creatorGUELFI, DIEGO R.V.
dc.creatorOLIVEIRA, SILVIO C. de
dc.creatorCASAGRANDE, GLEISON A.
dc.creatorCAIRES, ANDERSON R.L.
dc.creatorOLIVEIRA, FELIPE F. de
dc.creatorGUBIANI, JULIANA R.
dc.creatorCARDOSO, JULIANO C.
dc.creatorMACHULEK JUNIOR, AMILCAR
dc.date2022
dc.date2022-05-02T17:16:18Z
dc.date2022-05-02T17:16:18Z
dc.date.accessioned2023-09-28T14:22:08Z
dc.date.available2023-09-28T14:22:08Z
dc.identifier2213-3437
dc.identifierhttp://repositorio.ipen.br/handle/123456789/33001
dc.identifier2
dc.identifier10
dc.identifier10.1016/j.jece.2022.107212
dc.identifier84
dc.identifier84
dc.identifier.urihttps://repositorioslatinoamericanos.uchile.cl/handle/2250/9003221
dc.descriptionThe photoelectrocatalysis (PEC) using B-doped TiO2 photo-anodes for degradation of the propyphenazone (PPZ) was investigated. For this, four different composites based on TiO2 and TiO2-x%B (x = 1, 3 or 5) were synthesized by sol-gel method and supported on titanium substrate by the dip-coating technique. The morphology, optical and electrochemical properties of photo-anodes were evaluated by SEM, TEM, XPS, TGA, DSC, XRD, FTIR, DRS, and sweep voltammetry, respectively. The influence of pH (3, 6 or 9) and electrical potential intensity (+1 V, +2 V or +3 V) used in PEC were evaluated by kinetic study. To understand the synergistic effect of the composition of the photoelectrochemical system, photolysis (PS), electrocatalysis (EC) and photocatalysis (PC) experiments were realized under comparative conditions. Doping 3% of B into TiO2 promoted a decrease in band gap energy (Ebg = 2.91 eV), thus providing better radiation absorption and greater generation of charge carriers on the surface of the photo-anode. Characterization analyzes indicate the presence of B2O3 coexisting with TiO2. The most promising results were obtained using Ti/TiO2-3%B photo-anode (vs a DSA cathode), applying + 1 V at pH 6, resulting in 91% of PPZ degradation after 60 min of PEC treatment. Toxicity tests using A. salina and L. sativa showed that the effluent generated after 2 h of PEC treatment of 30 mg L-1 of PPZ is non-toxic for the studied species. Up to 13 by-products formed during the PEC and PS treatment were detected and a proposal pathway involving possible routes of PPZ degradation were presented.
dc.descriptionConselho Nacional de Desenvolvimento Cient??fico e Tecnol??gico (CNPq)
dc.descriptionCoordena????o de Aperfei??oamento de Pessoal de N??vel Superior (CAPES)
dc.descriptionFunda????o de Amparo ?? Pesquisa do Estado de S??o Paulo (FAPESP)
dc.descriptionCNPq: 409792/2018-7; 308232/2021-6; 303633/2018-2; 306477/2015-7; 401434/2012-5; 304888/2012-5; 484908/2011-1; 305201/2020-4; 304844/2018-7
dc.descriptionCAPES: 001
dc.descriptionFAPESP: 19/26210-8; 17/06014-4; 20/15230-5
dc.format1-15
dc.relationJournal of Environmental Chemical Engineering
dc.rightsopenAccess
dc.subjectphotocatalysis
dc.subjecttitanium oxides
dc.subjectsol-gel process
dc.subjectinflammation
dc.subjectdrugs
dc.subjecttoxicity
dc.titlePhoto-anodes based on B-doped TiO2 for photoelectrocatalytic degradation of propyphenazone
dc.typeArtigo de peri??dico
dc.coverageI


Este ítem pertenece a la siguiente institución