Solar Light-Driven Efficient Degradation of Organic Pollutants Mediated by S-Scheme MoS<sub>2</sub>@TiO<sub>2</sub>-Layered Structures
This study focuses on achieving high photocatalytic activity using MoS<sub>2</sub>/TiO<sub>2</sub> heterostructures (MOT). To this end, MoS<sub>2</sub> and TiO<sub>2</sub> were synthesized by employing hydrothermal synthesis techniques, and then MoS<...
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2024-12-01
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| author | Wajeehah Shahid Faryal Idrees Ji-Jun Zou Jeong Ryeol Choi Lun Pan |
| author_facet | Wajeehah Shahid Faryal Idrees Ji-Jun Zou Jeong Ryeol Choi Lun Pan |
| author_sort | Wajeehah Shahid |
| collection | DOAJ |
| description | This study focuses on achieving high photocatalytic activity using MoS<sub>2</sub>/TiO<sub>2</sub> heterostructures (MOT). To this end, MoS<sub>2</sub> and TiO<sub>2</sub> were synthesized by employing hydrothermal synthesis techniques, and then MoS<sub>2</sub>/TiO<sub>2</sub> heterostructures were synthesized by using 1:1, 1:2, 1:3, and 1:4 ratios of MoS<sub>2</sub> and TiO<sub>2</sub>, respectively. While the structural and electronic changes for the 1:2 and 1:3 ratios were relatively minor, significant modifications in bandgaps and morphology were observed for the 1:1 and 1:4 ratios. Thus, this study presents a comparative analysis of the photocatalytic performance of the 1:1 (MOT11) and 1:4 (MOT14) heterostructures. The formation of these heterostructures was confirmed through Energy-Dispersive X-ray Spectroscopy (EDX) and Fourier Transform Infrared Spectroscopy (FTIR) analysis. Notably, the bandgaps of MOT11 and MOT14 were red-shifted to 1.66–1.25 eV and 1.01–1.68 eV, respectively, indicating improved visible-light absorption capabilities. The photocatalytic activity of MOT11 and MOT14 was evaluated through the degradation of Rhodamine B (RhB) under simulated solar irradiation. MOT11 demonstrated a high degradation efficiency of 98.9% within 60 min, while MOT14 achieved 98.21% degradation after 90 min of irradiation. The significance of this study lies in its demonstration that a facile synthesis route and a small proportion of MoS<sub>2</sub> in the heterostructure can achieve excellent photocatalytic degradation performance under solar light. After MS-analysis, S-Scheme has been suggested, which has also been complimented by the scavenger tests. Additionally, the improved photocatalytic properties of MOT11 and MOT14 suggest their potential for future applications in hydrogen generation and water splitting, offering a pathway towards sustainable and clean energy production. |
| format | Article |
| id | doaj-art-1d6d3f9e7bc6416a9def057855df7c31 |
| institution | Kabale University |
| issn | 2079-4991 |
| language | English |
| publishDate | 2024-12-01 |
| publisher | MDPI AG |
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| series | Nanomaterials |
| spelling | doaj-art-1d6d3f9e7bc6416a9def057855df7c312025-01-10T13:19:18ZengMDPI AGNanomaterials2079-49912024-12-011512810.3390/nano15010028Solar Light-Driven Efficient Degradation of Organic Pollutants Mediated by S-Scheme MoS<sub>2</sub>@TiO<sub>2</sub>-Layered StructuresWajeehah Shahid0Faryal Idrees1Ji-Jun Zou2Jeong Ryeol Choi3Lun Pan4Department of Physics, The University of Lahore, Lahore 54000, PakistanDepartment of Physics, University of the Punjab, Lahore 54590, PakistanKey Laboratory for Green Chemical Technology of the Ministry of Education, School of Chemical Engineering and Technology, Tianjin University, Tianjin 300072, ChinaSchool of Electronic Engineering, Kyonggi University, Suwon 16227, Republic of KoreaKey Laboratory for Green Chemical Technology of the Ministry of Education, School of Chemical Engineering and Technology, Tianjin University, Tianjin 300072, ChinaThis study focuses on achieving high photocatalytic activity using MoS<sub>2</sub>/TiO<sub>2</sub> heterostructures (MOT). To this end, MoS<sub>2</sub> and TiO<sub>2</sub> were synthesized by employing hydrothermal synthesis techniques, and then MoS<sub>2</sub>/TiO<sub>2</sub> heterostructures were synthesized by using 1:1, 1:2, 1:3, and 1:4 ratios of MoS<sub>2</sub> and TiO<sub>2</sub>, respectively. While the structural and electronic changes for the 1:2 and 1:3 ratios were relatively minor, significant modifications in bandgaps and morphology were observed for the 1:1 and 1:4 ratios. Thus, this study presents a comparative analysis of the photocatalytic performance of the 1:1 (MOT11) and 1:4 (MOT14) heterostructures. The formation of these heterostructures was confirmed through Energy-Dispersive X-ray Spectroscopy (EDX) and Fourier Transform Infrared Spectroscopy (FTIR) analysis. Notably, the bandgaps of MOT11 and MOT14 were red-shifted to 1.66–1.25 eV and 1.01–1.68 eV, respectively, indicating improved visible-light absorption capabilities. The photocatalytic activity of MOT11 and MOT14 was evaluated through the degradation of Rhodamine B (RhB) under simulated solar irradiation. MOT11 demonstrated a high degradation efficiency of 98.9% within 60 min, while MOT14 achieved 98.21% degradation after 90 min of irradiation. The significance of this study lies in its demonstration that a facile synthesis route and a small proportion of MoS<sub>2</sub> in the heterostructure can achieve excellent photocatalytic degradation performance under solar light. After MS-analysis, S-Scheme has been suggested, which has also been complimented by the scavenger tests. Additionally, the improved photocatalytic properties of MOT11 and MOT14 suggest their potential for future applications in hydrogen generation and water splitting, offering a pathway towards sustainable and clean energy production.https://www.mdpi.com/2079-4991/15/1/28photocatalysisdegradationheterostructuresMoS<sub>2</sub>TiO<sub>2</sub>solar light |
| spellingShingle | Wajeehah Shahid Faryal Idrees Ji-Jun Zou Jeong Ryeol Choi Lun Pan Solar Light-Driven Efficient Degradation of Organic Pollutants Mediated by S-Scheme MoS<sub>2</sub>@TiO<sub>2</sub>-Layered Structures Nanomaterials photocatalysis degradation heterostructures MoS<sub>2</sub> TiO<sub>2</sub> solar light |
| title | Solar Light-Driven Efficient Degradation of Organic Pollutants Mediated by S-Scheme MoS<sub>2</sub>@TiO<sub>2</sub>-Layered Structures |
| title_full | Solar Light-Driven Efficient Degradation of Organic Pollutants Mediated by S-Scheme MoS<sub>2</sub>@TiO<sub>2</sub>-Layered Structures |
| title_fullStr | Solar Light-Driven Efficient Degradation of Organic Pollutants Mediated by S-Scheme MoS<sub>2</sub>@TiO<sub>2</sub>-Layered Structures |
| title_full_unstemmed | Solar Light-Driven Efficient Degradation of Organic Pollutants Mediated by S-Scheme MoS<sub>2</sub>@TiO<sub>2</sub>-Layered Structures |
| title_short | Solar Light-Driven Efficient Degradation of Organic Pollutants Mediated by S-Scheme MoS<sub>2</sub>@TiO<sub>2</sub>-Layered Structures |
| title_sort | solar light driven efficient degradation of organic pollutants mediated by s scheme mos sub 2 sub tio sub 2 sub layered structures |
| topic | photocatalysis degradation heterostructures MoS<sub>2</sub> TiO<sub>2</sub> solar light |
| url | https://www.mdpi.com/2079-4991/15/1/28 |
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