The Effect of AgInS<sub>2</sub>, SnS, CuS<sub>2</sub>, Bi<sub>2</sub>S<sub>3</sub> Quantum Dots on the Surface Properties and Photocatalytic Activity of QDs-Sensitized TiO<sub>2</sub> Composite
The effect of type (AgInS<sub>2</sub>, SnS, CuS<sub>2</sub>, Bi<sub>2</sub>S<sub>3</sub>) and amount (5, 10, 15 wt%) of quantum dots (QDs) on the surface properties and photocatalytic activity of QDs-sensitized TiO<sub>2</sub> composite, wa...
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MDPI AG
2020-04-01
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| author | Anna Malankowska Daria Kulesza Jakub Sowik Onur Cavdar Tomasz Klimczuk Grzegorz Trykowski Adriana Zaleska-Medynska |
| author_facet | Anna Malankowska Daria Kulesza Jakub Sowik Onur Cavdar Tomasz Klimczuk Grzegorz Trykowski Adriana Zaleska-Medynska |
| author_sort | Anna Malankowska |
| collection | DOAJ |
| description | The effect of type (AgInS<sub>2</sub>, SnS, CuS<sub>2</sub>, Bi<sub>2</sub>S<sub>3</sub>) and amount (5, 10, 15 wt%) of quantum dots (QDs) on the surface properties and photocatalytic activity of QDs-sensitized TiO<sub>2</sub> composite, was investigated. AgInS<sub>2</sub>, SnS, CuS<sub>2</sub>, Bi<sub>2</sub>S<sub>3</sub> QDs were obtained by hot-injection, sonochemical, microwave, and hot-injection method, respectively. To characterize of as-prepared samples high-resolution transmission electron microscopy (HRTEM), scanning electron microscopy (SEM), X-ray diffraction (XRD), UV-Vis spectroscopy and photoluminescence (PL) emission spectroscopy were applied. The size of AgInS<sub>2</sub>, SnS, CuS<sub>2</sub>, Bi<sub>2</sub>S<sub>3</sub> QDs were 12; 2–6; 2–3, and 1–2 nm, respectively. The QDs and QDs-sensitized TiO<sub>2</sub> composites obtained have been tested in toluene degradation under LEDs light irradiation (λ<sub>max</sub> = 415 nm and λ<sub>max</sub> = 375 nm). For pristine QDs the efficiency of toluene degradation increased in the order of AgInS<sub>2</sub> < Bi<sub>2</sub>S<sub>3</sub> < CuS < SnS under 375 nm and AgInS<sub>2</sub> < CuS < Bi<sub>2</sub>S<sub>3</sub> < SnS under 415 nm. In the presence of TiO<sub>2</sub>/SnS QDs_15% composite, 91% of toluene was degraded after 1 h of irradiation, and this efficiency was about 12 higher than that for pristine QDs under 375 nm. Generally, building the TiO<sub>2</sub>/AgInS<sub>2</sub> and TiO<sub>2</sub>/SnS exhibited higher photoactivity under 375 nm than the pristine TiO<sub>2</sub> and QDs which suggests a synergistic effect between QDs and TiO<sub>2</sub> matrix. |
| first_indexed | 2024-03-10T20:37:28Z |
| format | Article |
| id | doaj.art-1655f9fcd0de45ba98cbbf01f2732084 |
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| language | English |
| last_indexed | 2024-03-10T20:37:28Z |
| publishDate | 2020-04-01 |
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| spelling | doaj.art-1655f9fcd0de45ba98cbbf01f27320842023-11-19T20:53:42ZengMDPI AGCatalysts2073-43442020-04-0110440310.3390/catal10040403The Effect of AgInS<sub>2</sub>, SnS, CuS<sub>2</sub>, Bi<sub>2</sub>S<sub>3</sub> Quantum Dots on the Surface Properties and Photocatalytic Activity of QDs-Sensitized TiO<sub>2</sub> CompositeAnna Malankowska0Daria Kulesza1Jakub Sowik2Onur Cavdar3Tomasz Klimczuk4Grzegorz Trykowski5Adriana Zaleska-Medynska6Department of Environmental Technology, Faculty of Chemistry, University of Gdansk, 80-308 Gdansk, PolandDepartment of Environmental Technology, Faculty of Chemistry, University of Gdansk, 80-308 Gdansk, PolandDepartment of Environmental Technology, Faculty of Chemistry, University of Gdansk, 80-308 Gdansk, PolandDepartment of Environmental Technology, Faculty of Chemistry, University of Gdansk, 80-308 Gdansk, PolandDepartment of Solid State Physics, Faculty of Applied Physics and Mathematics, Gdansk University of Technology, 80-233 Gdansk, PolandFaculty of Chemistry, Nicolaus Copernicus University, 7 Gagarina str, 87-100 Toruń, PolandDepartment of Environmental Technology, Faculty of Chemistry, University of Gdansk, 80-308 Gdansk, PolandThe effect of type (AgInS<sub>2</sub>, SnS, CuS<sub>2</sub>, Bi<sub>2</sub>S<sub>3</sub>) and amount (5, 10, 15 wt%) of quantum dots (QDs) on the surface properties and photocatalytic activity of QDs-sensitized TiO<sub>2</sub> composite, was investigated. AgInS<sub>2</sub>, SnS, CuS<sub>2</sub>, Bi<sub>2</sub>S<sub>3</sub> QDs were obtained by hot-injection, sonochemical, microwave, and hot-injection method, respectively. To characterize of as-prepared samples high-resolution transmission electron microscopy (HRTEM), scanning electron microscopy (SEM), X-ray diffraction (XRD), UV-Vis spectroscopy and photoluminescence (PL) emission spectroscopy were applied. The size of AgInS<sub>2</sub>, SnS, CuS<sub>2</sub>, Bi<sub>2</sub>S<sub>3</sub> QDs were 12; 2–6; 2–3, and 1–2 nm, respectively. The QDs and QDs-sensitized TiO<sub>2</sub> composites obtained have been tested in toluene degradation under LEDs light irradiation (λ<sub>max</sub> = 415 nm and λ<sub>max</sub> = 375 nm). For pristine QDs the efficiency of toluene degradation increased in the order of AgInS<sub>2</sub> < Bi<sub>2</sub>S<sub>3</sub> < CuS < SnS under 375 nm and AgInS<sub>2</sub> < CuS < Bi<sub>2</sub>S<sub>3</sub> < SnS under 415 nm. In the presence of TiO<sub>2</sub>/SnS QDs_15% composite, 91% of toluene was degraded after 1 h of irradiation, and this efficiency was about 12 higher than that for pristine QDs under 375 nm. Generally, building the TiO<sub>2</sub>/AgInS<sub>2</sub> and TiO<sub>2</sub>/SnS exhibited higher photoactivity under 375 nm than the pristine TiO<sub>2</sub> and QDs which suggests a synergistic effect between QDs and TiO<sub>2</sub> matrix.https://www.mdpi.com/2073-4344/10/4/403photocatalysisTiO<sub>2</sub>quantum dotsmetal sulphidesair purification |
| spellingShingle | Anna Malankowska Daria Kulesza Jakub Sowik Onur Cavdar Tomasz Klimczuk Grzegorz Trykowski Adriana Zaleska-Medynska The Effect of AgInS<sub>2</sub>, SnS, CuS<sub>2</sub>, Bi<sub>2</sub>S<sub>3</sub> Quantum Dots on the Surface Properties and Photocatalytic Activity of QDs-Sensitized TiO<sub>2</sub> Composite Catalysts photocatalysis TiO<sub>2</sub> quantum dots metal sulphides air purification |
| title | The Effect of AgInS<sub>2</sub>, SnS, CuS<sub>2</sub>, Bi<sub>2</sub>S<sub>3</sub> Quantum Dots on the Surface Properties and Photocatalytic Activity of QDs-Sensitized TiO<sub>2</sub> Composite |
| title_full | The Effect of AgInS<sub>2</sub>, SnS, CuS<sub>2</sub>, Bi<sub>2</sub>S<sub>3</sub> Quantum Dots on the Surface Properties and Photocatalytic Activity of QDs-Sensitized TiO<sub>2</sub> Composite |
| title_fullStr | The Effect of AgInS<sub>2</sub>, SnS, CuS<sub>2</sub>, Bi<sub>2</sub>S<sub>3</sub> Quantum Dots on the Surface Properties and Photocatalytic Activity of QDs-Sensitized TiO<sub>2</sub> Composite |
| title_full_unstemmed | The Effect of AgInS<sub>2</sub>, SnS, CuS<sub>2</sub>, Bi<sub>2</sub>S<sub>3</sub> Quantum Dots on the Surface Properties and Photocatalytic Activity of QDs-Sensitized TiO<sub>2</sub> Composite |
| title_short | The Effect of AgInS<sub>2</sub>, SnS, CuS<sub>2</sub>, Bi<sub>2</sub>S<sub>3</sub> Quantum Dots on the Surface Properties and Photocatalytic Activity of QDs-Sensitized TiO<sub>2</sub> Composite |
| title_sort | effect of agins sub 2 sub sns cus sub 2 sub bi sub 2 sub s sub 3 sub quantum dots on the surface properties and photocatalytic activity of qds sensitized tio sub 2 sub composite |
| topic | photocatalysis TiO<sub>2</sub> quantum dots metal sulphides air purification |
| url | https://www.mdpi.com/2073-4344/10/4/403 |
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