Publicación: CATALYTIC PHOTO-DEGRADATION OF BRILLIANT GREEN AND BACTERIAL DISINFECTION OF ESCHERICHIA COLI BY THE ACTION OF Y2TI2O7/AGO FILMS
Fecha
2024
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CERAMICS INTERNATIONAL
Resumen
IN THIS STUDY, WE EVALUATED THE PHOTOCATALYTIC EFFICACY OF PURE Y2TI2O7 FILMS INCORPORATING VARYING AGO RATIOS (1.0, 3.0, AND 5.0 MOL%) IN THE DEGRADATION PROCESS OF BRILLIANT GREEN DYE AND IN THE BACTERIAL DISINFECTION OF ESCHERICHIA COLI UNDER UV?VISIBLE ILLUMINATION. THE FILMS WERE PREPARED UTILIZING A PHOTOCHEMICAL METHODOLOGY INVOLVING ?-DIKETONATE COMPLEXES OF Y(DBM)3, TI(DBM)4, AND AG(ACAC) AS STARTING MATERIALS. FOLLOWING SYNTHESIS, THE PHOTO-DEPOSITS UNDERWENT CALCINATION AT 900 °C FOR 2 H AND WERE SUBSEQUENTLY ANALYZED USING FOURIER TRANSFORM INFRARED SPECTROSCOPY, X-RAY DIFFRACTION, SCANNING ELECTRON MICROSCOPY - ENERGY DISPERSIVE X-RAY SPECTROSCOPY, AND X-RAY PHOTOELECTRON SPECTROSCOPY. THE OUTCOMES OF THESE CHARACTERIZATIONS INDICATE THE FORMATION OF A PYROCHLORE Y2TI2O7 CUBIC PHASE, WITH THE EMERGENCE OF AGO IN THE DOPED SAMPLES. PHOTOCATALYTIC PERFORMANCE YIELDED SIGNIFICANT RESULTS, WITH A 94.9 % DEGRADATION OF BRILLIANT GREEN OBSERVED FOR Y2TI2O7 SAMPLES DOPED AT 3.0 MOL%, AND A 98.4 % INHIBITION OF ESCHERICHIA COLI CULTURES OBSERVED FOR Y2TI2O7 SAMPLES DOPED AT 1.0 MOL%. THEORETICAL CALCULATIONS WERE EMPLOYED TO DETERMINE THE BAND EDGE POTENTIALS OF BOTH OXIDES, SUPPORTING THE ESTABLISHMENT OF A TYPE I HETEROJUNCTION BETWEEN THE Y2TI2O7 PHASE AND AGO. A DEGRADATION MECHANISM HAS BEEN POSTULATED BASED ON ASSAYS INVOLVING THE BLOCKING OF REACTIVE OXYGEN SPECIES AND CHARGE CARRIERS THROUGH THE USE OF SPECIFIC
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Y2Ti2O7 films, Photocatalyst, Photo-deposition, Escherichia coli (E. coli), Brilliant green (BG)
