000266633 001__ 266633
000266633 005__ 20190626075622.0
000266633 022__ $$a1010-6030
000266633 02470 $$a000464087000032$$2isi
000266633 0247_ $$a10.1016/j.jphotochem.2019.02.033$$2doi
000266633 037__ $$aARTICLE
000266633 245__ $$aEvidence for a dual mechanism in the TiO2/CuxO photocatalyst during the degradation of sulfamethazine under solar or visible light: Critical issues
000266633 260__ $$c2019$$aLausanne$$bELSEVIER SCIENCE SA
000266633 269__ $$a2019-04-15
000266633 336__ $$aJournal Articles
000266633 520__ $$aThis study presents the photocatalytic degradation of sulfamethazine (SMT) on TiO2/CuxO nanotubes (NTs) by a differentiated mechanism under low intensity solar light and indoor visible light irradiation. In the presence of TiO2/CuxO nanotubes, the SMT-degradation was complete within 3 h (in acid aqueous solution). The surface of the photocatalyst used was registered by scanning and transmission electron microscopy SEM/TEM. By X-ray diffraction (XRD), the anatase and rutile phases were detected in the TiO2/CuxO(1%) materials. This photo catalyst led to the fastest SMT-degradation. By X-ray photoelectron spectroscopy (XPS) the TiO2 and CuxO species deconvoluted signals provided the evidence for the redox catalysis taking place during SMT-degradation. Cu2O was the major component in the TiO2/CuxO(1%) samples as detected by XPS. The SMT-degradation kinetics was monitored by high performance liquid chromatography (HPLC). The reactive oxidative species (ROS) generated by TiO2/CuxO surface under solar and visible light irradiation were unambiguously identified by appropriate scavengers. The band-gap of the TiO2/CuxO NTs prepared in this study is reported. The stability of the TiO2/CuxO leading to SMT-photodegradation was monitored. The interfacial charge transfer (IFCT) photo activated by solar light on the TiO2/CuxO surface is suggested to proceed via a Schottky barrier. But under visible light a mechanism involving surface plasmon resonance (SPR) mechanism is suggested to account for the observed IFCT.
000266633 650__ $$aChemistry, Physical
000266633 650__ $$aChemistry
000266633 6531_ $$asemiconductor-oxide photocatalysis
000266633 6531_ $$asulfamethazine
000266633 6531_ $$aredox catalysis
000266633 6531_ $$ainterfacial charge transfer (ifct)
000266633 6531_ $$aindoor visible light
000266633 6531_ $$aantibiotic sulfamethazine
000266633 6531_ $$areduction
000266633 6531_ $$amineralization
000266633 6531_ $$ananocomposites
000266633 6531_ $$asemiconductor
000266633 6531_ $$aefficiency
000266633 6531_ $$aoxidation
000266633 6531_ $$aelectrode
000266633 6531_ $$aremoval
000266633 6531_ $$ahybrid
000266633 700__ $$aYu, Jiajie
000266633 700__ $$aKiwi, John
000266633 700__ $$aWang, Tianhe
000266633 700__ $$aPulgarin, Cesar$$0240005$$g106159
000266633 700__ $$aRtimi, Sami$$0247403$$g216848
000266633 773__ $$j375$$q270-279$$tJournal Of Photochemistry And Photobiology A-Chemistry
000266633 8560_ $$fsami.rtimi@epfl.ch
000266633 909C0 $$yApproved$$pGPAO$$xU12575$$msami.rtimi@epfl.ch$$zBorel, Alain$$0252422
000266633 909CO $$particle$$ooai:infoscience.epfl.ch:266633$$pSB
000266633 961__ $$apierre.devaud@epfl.ch
000266633 973__ $$aEPFL$$sPUBLISHED$$rREVIEWED
000266633 980__ $$aARTICLE
000266633 980__ $$aWoS
000266633 981__ $$aoverwrite