{"id":26137,"date":"2018-03-31T23:47:53","date_gmt":"2018-03-31T21:47:53","guid":{"rendered":"https:\/\/icmsva.vallealto.es\/?articulos_sci=silver-modified-zno-highly-uv-photoactive"},"modified":"2026-04-14T11:45:57","modified_gmt":"2026-04-14T09:45:57","slug":"silver-modified-zno-highly-uv-photoactive","status":"publish","type":"articulos_sci","link":"https:\/\/icmsva.vallealto.es\/?articulos_sci=silver-modified-zno-highly-uv-photoactive","title":{"rendered":"Silver-modified ZnO highly UV-photoactive"},"content":{"rendered":"<figure><img decoding=\"async\" src=\"https:\/\/icmsva.vallealto.es\/wp-content\/uploads\/2018\/03\/Silver-modified-ZnO-highly-UV-photoactive-1-1.jpg\" alt=\"Silver-modified ZnO highly UV-photoactive\" \/><\/figure>\n<p>ZnO nanoparticles were successfully synthesized by a controlled precipitation procedure by mixing aqueous solutions of Zn(II) acetate and dissolved Na2CO3 at pH ca. 7.0 without template addition and ulterior calcination at 400\u202f\u00b0C for 2\u202fh. The Ag-ZnO catalysts (ranging from 0.5 to 10\u202fAg\u202fwt.-%) were obtained by photochemical deposition method at the surface of the prepared ZnO sample, using AgNO3 as precursor. The as-prepared catalysts (with and without silver) were characterized by XRD, BET, FE-SEM, TEM, and XPS and diffuse reflectance spectroscopy (DRS). The effect of Ag-phodeposition on the photocatalytic properties of ZnO nanoparticles was investigated. Three different probe molecules were used to evaluate the photocatalytic properties under UV-illumination and visible illumination: Methyl Orange and Rhodamine B were chosen as hazardous dyes and Phenol as a transparent substrate. For each of the chosen substrates, it was observed that the UV-photocatalytic properties of ZnO improved with the amount of Ag deposited, up to an optimum percentage around 1\u20135\u202fwt.-% Ag, being even better than the commercial Evonik-TiO2(P25) in the same conditions. Above this amount, the UV-photocatalytic properties of the Ag-ZnO samples remain unchanged, indicating a maximum for Ag-deposition. While ZnO and Ag-ZnO catalysts can photodegrade Rhodamine B, Methyl Orange and Phenol totally within 60\u202fmin under UV-illumination, the process is slightly faster for the case of Ag\u2013ZnO nanoparticles. Under Vis-illumination, the silver-metalized samples did not present photocatalytic activity in the degradation of Methyl Orange. However, a very low photoactivity was present for phenol degradation (10% conversion) and a moderate conversion of ca. 70% for Rhodamine B degradation, after 120\u202fmin of Visible-illumination. High conversion values and a total organic carbon (TOC) removal of 86\u201397% were obtained over the Ag-ZnO photocatalysts after 120\u202fmin of UV-illumination, suggesting that these Ag-modified ZnO nanoparticles may have good applications in wastewater treatment, due to its reuse properties.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>ZnO nanoparticles were successfully synthesized by a controlled precipitation procedure by mixing aqueous solutions of Zn(II) acetate and dissolved Na2CO3 at pH ca. 7.0 without template addition and ulterior calcination at 400\u202f\u00b0C for 2\u202fh. The Ag-ZnO catalysts (ranging from 0.5 to 10\u202fAg\u202fwt.-%) were obtained by photochemical deposition method at the surface of the prepared ZnO&hellip;<\/p>\n","protected":false},"featured_media":26138,"template":"","autores":[],"grupos_de_investigacion":[135],"revistas":[931],"anos":[887],"destacados":[],"class_list":["post-26137","articulos_sci","type-articulos_sci","status-publish","has-post-thumbnail","hentry","grupos_de_investigacion-fotocatalisis-heterogenea-aplicaciones","revistas-journal-of-photochemistry-and-photobiology-a-chemistry","anos-887","description-off"],"acf":[],"_links":{"self":[{"href":"https:\/\/icmsva.vallealto.es\/index.php?rest_route=\/wp\/v2\/articulos_sci\/26137","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\/26137\/revisions"}],"predecessor-version":[{"id":26139,"href":"https:\/\/icmsva.vallealto.es\/index.php?rest_route=\/wp\/v2\/articulos_sci\/26137\/revisions\/26139"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/icmsva.vallealto.es\/index.php?rest_route=\/wp\/v2\/media\/26138"}],"wp:attachment":[{"href":"https:\/\/icmsva.vallealto.es\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=26137"}],"wp:term":[{"taxonomy":"autores","embeddable":true,"href":"https:\/\/icmsva.vallealto.es\/index.php?rest_route=%2Fwp%2Fv2%2Fautores&post=26137"},{"taxonomy":"grupos_de_investigacion","embeddable":true,"href":"https:\/\/icmsva.vallealto.es\/index.php?rest_route=%2Fwp%2Fv2%2Fgrupos_de_investigacion&post=26137"},{"taxonomy":"revistas","embeddable":true,"href":"https:\/\/icmsva.vallealto.es\/index.php?rest_route=%2Fwp%2Fv2%2Frevistas&post=26137"},{"taxonomy":"anos","embeddable":true,"href":"https:\/\/icmsva.vallealto.es\/index.php?rest_route=%2Fwp%2Fv2%2Fanos&post=26137"},{"taxonomy":"destacados","embeddable":true,"href":"https:\/\/icmsva.vallealto.es\/index.php?rest_route=%2Fwp%2Fv2%2Fdestacados&post=26137"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}