20.500.12556/RUL-173641 $SnS_2$-$TiO_2$ heterojunction designed for reductive degradation of contaminants of emerging concern Contaminants of emerging concern (CECs), including pharmaceuticals and perfluorinated compounds, pose a growing threat to water quality due to their persistence and resistance to conventional treatment methods. In this context, photocatalytic processes capable of promoting both oxidative and reductive transformations have attracted increasing attention. This study explores the synthesis and performance of a SnS$_2$-TiO$_2$ heterojunction photocatalyst, designed to facilitate such reactions under solar and UV-A light. The composite was synthesized via the hydrothermal method and thoroughly characterized for its morphological, structural, surface, and semiconducting properties. The results confirmed the formation of a type-II heterojunction with improved visible-light absorption and suppressed charge recombination. Photoelectrochemical measurements indicated enhanced charge separation and favorable band-edge alignment for reductive processes. Photocatalytic experiments with amoxicillin (AMX) and perfluorooctanoic acid (PFOA) revealed distinct degradation behaviors: AMX was predominantly degraded via superoxide-mediated reductive pathways, whereas PFOA exhibited limited transformation, likely proceeding via a combination of oxidative and reductive mechanisms. While overall removal efficiencies were moderate, this study highlights the role of band structure engineering and heterojunction design in tailoring photocatalytic behavior. The SnS$_2$-TiO$_2$ system serves as a promising platform for further development of composite materials to address the challenge of CECs in water treatment. composites solar photocatalysis contaminants of emerging concern reductive degradation kompoziti fotokataliza onesnaževala v nastajanju reduktivna razgradnja true false true Angleški jezik Slovenski jezik Članek v reviji 2025-09-19 09:22:37 2025-09-19 09:22:37 2025-11-11 03:55:40 0000-00-00 00:00:00 2025 0 0 17 str. iss. 13, art. 969 Vol. 15 Jul. 2025 0000-00-00 Zaloznikova Objavljeno NiDoloceno 0000-00-00 0000-00-00 0000-00-00 620.1:544.526.5 2079-4991 10.3390/nano15130969 240836611 nanomaterials-15-00969.pdf nanomaterials-15-00969.pdf 1 F30C40F0F1504172E9AE0882784815FF 407d69c7020217e44cc62bfbb843000b8807b3f242052e1cd0ac713a1dfb2cc4 8d290da3-952a-11f0-9328-0050569b8976 https://repozitorij.uni-lj.si/Dokument.php?lang=slv&id=218252 https://www.mdpi.com/2079-4991/15/13/969 1 3eb18d15-9529-11f0-9328-0050569b8976 https://repozitorij.uni-lj.si/Dokument.php?lang=slv&id=218251 Fakulteta za kemijo in kemijsko tehnologijo 0 0 0