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Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (http://creativecommons.org/licenses/by/4.0/).
SEM micrographs of the HDPE MPs after visible-light photocatalytic degradation for 50 h by C,N-TiO2 in the (a) tert-Butanol, (b) isopropyl alcohol (c) tiron, and (d) copper nitrate scavengers.