{"id":23747,"date":"2026-04-30T23:59:57","date_gmt":"2026-04-30T21:59:57","guid":{"rendered":"https:\/\/icmsva.vallealto.es\/?articulos_sci=efficient-degradation-of-ciprofloxacin-by-photocatalytic-activity-of-ag-modified-zno"},"modified":"2026-04-14T11:41:44","modified_gmt":"2026-04-14T09:41:44","slug":"efficient-degradation-of-ciprofloxacin-by-photocatalytic-activity-of-ag-modified-zno","status":"publish","type":"articulos_sci","link":"https:\/\/icmsva.vallealto.es\/?articulos_sci=efficient-degradation-of-ciprofloxacin-by-photocatalytic-activity-of-ag-modified-zno","title":{"rendered":"Efficient degradation of ciprofloxacin by photocatalytic activity of Ag-modified ZnO"},"content":{"rendered":"<figure><img decoding=\"async\" src=\"https:\/\/icmsva.vallealto.es\/wp-content\/uploads\/2026\/04\/Efficient-degradation-of-ciprofloxacin-by-photocat-1.png\" alt=\"Efficient degradation of ciprofloxacin by photocatalytic activity of Ag-modified ZnO\" \/><\/figure>\n<p>Ciprofloxacin (CIP) is a highly persistent antibiotic whose presence in natural aquatic matrices represents a critical challenge for public health and environmental protection. In this study, the photocatalytic efficiency of ZnO and its Ag-modified counterpart, synthesized by coprecipitation and photodeposition, respectively, was evaluated in the ciprofloxacin elimination in distilled water and in a real matrix from the Chipalo River (Ibague, Colombia), integrating the degradation of the antibiotic, the elucidation of its transformation pathways, and the ecotoxicological assessment of the generated byproducts. The obtained materials corresponded to ZnO-Ag heterojunctions with high crystallinity and purity. The incorporation of Ag generated localized plasmonic resonances that extended absorption toward the visible region. The photocatalytic degradation of CIP followed a pseudo-first-order kinetic model, in which h+ and the center dot O2- radical were the predominant reactive species. In distilled water, the materials achieved efficiencies of 96-98% at pH 6 with 1 g\/L catalyst, whereas in the real matrix, degradation decreased to 86-92%. Three main transformation routes were identified, dominated by the opening of the piperazine ring and the cleavage of the C-F bond, giving rise to multiple intermediates. Bioassays with Daphnia magna showed a toxic response dependent on CIP concentration; however, the byproducts formed during photocatalysis were significantly more toxic than the original molecule and those generated by photolysis, reaching up to 100% immobilization. These findings highlight the need to optimize photocatalysis toward greater mineralization and reduced formation of toxic byproducts.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Ciprofloxacin (CIP) is a highly persistent antibiotic whose presence in natural aquatic matrices represents a critical challenge for public health and environmental protection. In this study, the photocatalytic efficiency of ZnO and its Ag-modified counterpart, synthesized by coprecipitation and photodeposition, respectively, was evaluated in the ciprofloxacin elimination in distilled water and in a real matrix&hellip;<\/p>\n","protected":false},"featured_media":23748,"template":"","autores":[],"grupos_de_investigacion":[135],"revistas":[236],"anos":[879],"class_list":["post-23747","articulos_sci","type-articulos_sci","status-publish","has-post-thumbnail","hentry","grupos_de_investigacion-fotocatalisis-heterogenea-aplicaciones","revistas-catalysis-today","anos-879","description-off"],"acf":[],"_links":{"self":[{"href":"https:\/\/icmsva.vallealto.es\/index.php?rest_route=\/wp\/v2\/articulos_sci\/23747","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/icmsva.vallealto.es\/index.php?rest_route=\/wp\/v2\/articulos_sci"}],"about":[{"href":"https:\/\/icmsva.vallealto.es\/index.php?rest_route=\/wp\/v2\/types\/articulos_sci"}],"version-history":[{"count":1,"href":"https:\/\/icmsva.vallealto.es\/index.php?rest_route=\/wp\/v2\/articulos_sci\/23747\/revisions"}],"predecessor-version":[{"id":23749,"href":"https:\/\/icmsva.vallealto.es\/index.php?rest_route=\/wp\/v2\/articulos_sci\/23747\/revisions\/23749"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/icmsva.vallealto.es\/index.php?rest_route=\/wp\/v2\/media\/23748"}],"wp:attachment":[{"href":"https:\/\/icmsva.vallealto.es\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=23747"}],"wp:term":[{"taxonomy":"autores","embeddable":true,"href":"https:\/\/icmsva.vallealto.es\/index.php?rest_route=%2Fwp%2Fv2%2Fautores&post=23747"},{"taxonomy":"grupos_de_investigacion","embeddable":true,"href":"https:\/\/icmsva.vallealto.es\/index.php?rest_route=%2Fwp%2Fv2%2Fgrupos_de_investigacion&post=23747"},{"taxonomy":"revistas","embeddable":true,"href":"https:\/\/icmsva.vallealto.es\/index.php?rest_route=%2Fwp%2Fv2%2Frevistas&post=23747"},{"taxonomy":"anos","embeddable":true,"href":"https:\/\/icmsva.vallealto.es\/index.php?rest_route=%2Fwp%2Fv2%2Fanos&post=23747"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}