{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,9,21]],"date-time":"2026-09-21T16:46:17Z","timestamp":1790009177417,"version":"4.0.1"},"reference-count":60,"publisher":"MDPI AG","issue":"3","license":[{"start":{"date-parts":[[2019,1,29]],"date-time":"2019-01-29T00:00:00Z","timestamp":1548720000000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by\/4.0\/"}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Materials"],"abstract":"<jats:p>In the present study, we propose a new photocatalytic interface prepared by high-power impulse magnetron sputtering (HiPIMS), and investigated for the degradation of Reactive Green 12 (RG12) as target contaminant under visible light light-emitting diodes (LEDs) illumination. The CuxO\/TiO2 nanoparticulate photocatalyst was sequentially sputtered on polyester (PES). The photocatalyst formulation was optimized by investigating the effect of different parameters such as the sputtering time of CuxO, the applied current, and the deposition mode (direct current magnetron sputtering, DCMS or HiPIMS). The results showed that the fastest RG12 degradation was obtained on CuxO\/TiO2 sample prepared at 40 A in HiPIMS mode. The better discoloration efficiency of 53.4% within 360 min was found in 4 mg\/L of RG12 initial concentration and 0.05% Cuwt\/PESwt as determined by X-ray fluorescence. All the prepared samples contained a TiO2 under-layer with 0.02% Tiwt\/PESwt. By transmission electron microscopy (TEM), both layers were seen uniformly distributed on the PES fibers. The effect of the surface area to volume (dye volume) ratio (SA\/V) on the photocatalytic efficiency was also investigated for the discoloration of 4 mg\/L RG12. The effect of the presence of different chemicals (scavengers, oxidant or mineral pollution or salts) in the photocatalytic medium was studied. The optimization of the amount of added hydrogen peroxide (H2O2) and potassium persulfate (K2S2O8) was also investigated in detail. Both, H2O2 and K2S2O8 drastically affected the discoloration efficiency up to 7 and 6 times in reaction rate constants, respectively. Nevertheless, the presence of Cu (metallic nanoparticles) and NaCl salt inhibited the reaction rate of RG12 discoloration by about 4 and 2 times, respectively. Moreover, the systematic study of reactive oxygen species\u2019 (ROS) contribution was also explored with the help of iso-propanol, methanol, and potassium dichromate as \u2022OH radicals, holes (h+), and superoxide ion-scavengers, respectively. Scavenging results showed that O2\u2212 played a primary role in RG12 removal; however, \u2022OH radicals\u2019 and photo-generated holes\u2019 (h+) contributions were minimal. The CuxO\/TiO2 photocatalyst was found to have a good reusability and stability up to 21 cycles. Ions\u2019 release was quantified by means of inductively coupled plasma mass spectrometry (ICP-MS) showing low Cu-ions\u2019 release.<\/jats:p>","DOI":"10.3390\/ma12030412","type":"journal-article","created":{"date-parts":[[2019,1,29]],"date-time":"2019-01-29T11:27:52Z","timestamp":1548761272000},"page":"412","update-policy":"https:\/\/doi.org\/10.3390\/mdpi_crossmark_policy","source":"Crossref","is-referenced-by-count":60,"title":["Photocatalytic Performance of CuxO\/TiO2 Deposited by HiPIMS on Polyester under Visible Light LEDs: Oxidants, Ions Effect, and Reactive Oxygen Species Investigation"],"prefix":"10.3390","volume":"12","author":[{"ORCID":"https:\/\/orcid.org\/0000-0002-3113-041X","authenticated-orcid":false,"given":"Hichem","family":"Zeghioud","sequence":"first","affiliation":[{"name":"Department of Process Engineering, Faculty of Engineering, Badji Mokhtar University, P.O. Box 12, 23000 Annaba, Algeria"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Aymen Amine","family":"Assadi","sequence":"additional","affiliation":[{"name":"Ecole Nationale Sup\u00e9rieure de Chimie de Rennes, Universit\u00e9 de Rennes 1, CNRS, UMR 6226, All\u00e9e de Beaulieu, CS 50837, 35708 Rennes CEDEX 7, France"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Nabila","family":"Khellaf","sequence":"additional","affiliation":[{"name":"Laboratory of Organic Synthesis-Modeling and Optimization of Chemical Processes, Badji Mokhtar University, P.O. Box 12, 23000 Annaba, Algeria"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Hayet","family":"Djelal","sequence":"additional","affiliation":[{"name":"Ecole des M\u00e9tiers de l\u2019Environnement, Campus de Ker Lann, 35170 Bruz, France"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Abdeltif","family":"Amrane","sequence":"additional","affiliation":[{"name":"Ecole Nationale Sup\u00e9rieure de Chimie de Rennes, Universit\u00e9 de Rennes 1, CNRS, UMR 6226, All\u00e9e de Beaulieu, CS 50837, 35708 Rennes CEDEX 7, France"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-1924-3710","authenticated-orcid":false,"given":"Sami","family":"Rtimi","sequence":"additional","affiliation":[{"name":"Ecole Polytechnique F\u00e9d\u00e9rale de Lausanne, EPFL-STI-LTP, Station 12, CH-1015 Lausanne, Switzerland"}],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"1968","published-online":{"date-parts":[[2019,1,29]]},"reference":[{"key":"ref_1","doi-asserted-by":"crossref","first-page":"145","DOI":"10.1016\/S0926-3373(00)00276-9","article-title":"Photocatalytic degradation pathway of methylene blue in water","volume":"31","author":"Houas","year":"2001","journal-title":"App. Cat. 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