Fabrication of 0D/2D SnS2 quantum dots modified TiO2 nanosheets heterojunction for enhanced photocatalytic degradation of tetracycline

•SnS2QDs@TiO2NSs photocatalyst was prepared through hydrothermal method.•SnS2QDs@TiO2NSs exhibited excellent photocatalytic degradation of tetracycline under visible light irradiation.•The degradation efficiency of SnS2QDs@TiO2NSs photocatalyst was 98.71 % in 1 h reaction.•SnS2QDs@TiO2NSs photocatal...

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Published in:Materials science & engineering. B, Solid-state materials for advanced technology Solid-state materials for advanced technology, 2024-12, Vol.310, p.117680, Article 117680
Main Authors: Shanmugaraj, Krishnamoorthy, Manikandan, Velu, Vinoth, Victor, Annamalai, Padmanaban, Selvamani, Muthamizh, Song, Kwang Soup, Mathivanan, Moorthy, Novoa, Néstor, Pugazhenthiran, Nalandhiran
Format: Article
Language:English
Subjects:
0D/2D heterojunction
Nanocomposites
Photocatalysis
SnS2QDs@TiO2NSs
Tetracycline antibiotics
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Summary:•SnS2QDs@TiO2NSs photocatalyst was prepared through hydrothermal method.•SnS2QDs@TiO2NSs exhibited excellent photocatalytic degradation of tetracycline under visible light irradiation.•The degradation efficiency of SnS2QDs@TiO2NSs photocatalyst was 98.71 % in 1 h reaction.•SnS2QDs@TiO2NSs photocatalyst exhibited high stability and recyclability. The production of highly efficient photocatalysts for the degradation of pharmaceutical pollutants present in the environmental samples are highly important and challenging. In this study, we aimed to develop and evaluate SnS2QDs modified TiO2 nanosheets (SnS2QDs@TiO2NSs) 0D/2D as an advanced photocatalyst for the degradation of tetracycline (TC) antibiotics under visible light irradiation. We successfully synthesized the SnS2QDs@TiO2NSs 0D/2D heterojunction using hydrothermal method. The successful formation of SnS2QDs onto the surface of TiO2NSs was characterized by various advanced techniques. The material demonstrated exceptional photocatalytic performance, achieving a TC degradation efficiency of 98.71 % within 60 min. Moreover, SnS2QDs@TiO2NSs exhibited remarkable stability, maintaining its efficiency after five recycles. The degradation rate constant for SnS2QDs@TiO2NSs was 0.078 min-1, approximately 3.7 times greater than that of pure TiO2NSs. We further investigated the impact of various initial TC concentrations and pH values on the photocatalytic performance. Additionally, a plausible photocatalysis reaction mechanism was proposed. These results suggested that SnS2QDs@TiO2NSs hold great potential for antibiotic degradation and wastewater treatment applications.
ISSN:0921-5107
DOI:10.1016/j.mseb.2024.117680