Abstract
Conventional methodologies for the detection and remediation of hexavalent chromium (Cr(VI)) are characterized by their complexity and financial burden, necessitating the pursuit of methodologies that are both efficacious and economical, with minimal environmental impact. Within this investigation, we report the fabrication of hollow polysulfone (PSF) microspheres, imbued with bifluorescent quantum dots and metal-organic frameworks, utilizing a Pickering emulsion paradigm to facilitate photolytic Cr(VI) degradation and consistent visual detection. Our results reveal that these engineered microspheres sustain an exceptional degradation efficiency exceeding 98 % for Cr(VI) over quintuple cycles, devoid of agitation, alongside pronounced fluorescence quenching indicative of a durable and recyclable sensing modality. The inherent low density and vacuous architecture of these spheres afford them buoyancy, augmenting their interaction with aqueous pollutants. Furthermore, the material exhibits a distinguished selectivity for Cr(VI), markedly eclipsing alternative metal ions in fluorescence suppression assays, validating its efficacy for heavy metal detection. The dual-functional attributes, coupled with their enduring stability and eco-friendly profile, position the CCUP microspheres at the forefront of water treatment innovation, potentially revolutionizing the real-time tracing of heavy metal pollutants.
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