$SnS_2$-$TiO_2$ heterojunction designed for reductive degradation of contaminants of emerging concern

Pandey, Suresh Kumar (avtor), Romac, Sandra (avtor), Papac Zjačić, Josipa (avtor), Kraljić Roković, Marijana (avtor), Kovačić, Marin (avtor), Kušić, Hrvoje (avtor), Žener, Boštjan (avtor), Genorio, Boštjan (avtor), Lavrenčič Štangar, Urška (avtor), Lončarić Božić, Ana (avtor)

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.

• Jezik: Angleški jezik
• Ključne besede: composites, solar photocatalysis, contaminants of emerging concern, reductive degradation
• Vrsta gradiva: Članek v reviji
• Tipologija: 1.01 - Izvirni znanstveni članek
• Organizacija: FKKT - Fakulteta za kemijo in kemijsko tehnologijo
• Status publikacije: Objavljeno
• Različica publikacije: Objavljena publikacija
• Leto izida: 2025
• Št. strani: 17 str.
• Številčenje: Vol. 15, iss. 13, art. 969
• PID: 20.500.12556/RUL-173641
• UDK: 620.1:544.526.5
• ISSN pri članku: 2079-4991
• DOI: 10.3390/nano15130969
• COBISS.SI-ID: 240836611
• Datum objave v RUL: 19.09.2025

Gradivo je del revije

• Naslov: Nanomaterials
• Skrajšan naslov: Nanomaterials
• Založnik: MDPI AG
• ISSN: 2079-4991
• COBISS.SI-ID: 523286297

Licence

• Licenca: CC BY 4.0, Creative Commons Priznanje avtorstva 4.0 Mednarodna
• Povezava: http://creativecommons.org/licenses/by/4.0/deed.sl
• Opis: To je standardna licenca Creative Commons, ki daje uporabnikom največ možnosti za nadaljnjo uporabo dela, pri čemer morajo navesti avtorja.

Sekundarni jezik

• Jezik: Slovenski jezik
• Ključne besede: kompoziti, fotokataliza, onesnaževala v nastajanju, reduktivna razgradnja