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Photocatalytic degradation of microplastics assisted by permanently polarized hydroxyapatite decorated with Titania NPs
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Researchers decorated permanently polarized hydroxyapatite (pHAp) with TiO2 nanoparticles to create an enhanced photocatalyst for degrading microplastics in aquatic environments, exploiting the internal electric field of polarized hydroxyapatite to improve electron transfer and reactive oxygen species generation. The composite material demonstrated improved photocatalytic degradation of microplastics compared to TiO2 alone under visible and UV light irradiation.
La creixent acumulació de microplàstics en els entorns aquàtics suposa una important amenaça mediambiental a causa de la seva persistència i la seva potencial toxicitat. Els processos d'oxidació avançats, en particular la fotocatàliss, ofereixen un enfocament eficaç per degradar els microplàstics en subproductes menys nocius. En aquest treball, s'ha decorat hidroxiapatita permanentment polaritzada (pHAp) amb nanopartícules de TiO2 per aconseguir una millor transferència d'electrons per a la degradació dels microplàstics. La hidroxiapatita permanentment polaritzada (pHAp) és un catalitzador capaç de descompondre els microplàstics en compostos segurs pel medi ambient i les nanopartícules de diòxid de titani (TiO2 NPs) s'utilitzen com fotocatalizadores per la seva alta eficiència en la generació d'espècies reactives d'oxigen sota irradiació UV. Amb l'objectiu de millorar tot el rendiment catalític, aquest estudi se centra en la síntesi i caracterització d'un sistema catalític compost per pHAp decorada amb nanopartícules de TiO2, l'avaluació de la seva eficiència fotocatalítica en la degradació de microplàstics i l'optimització de les seves propietats per maximitzar-ne el rendiment en condicions rellevants per al medi ambient.
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