Lai, Magdeline Tze Leng and Lee, Kian Mun and Yang, Thomas Chung Kuang and Pan, Guan Ting and Lai, Chin Wei and Chen, Chia-Yun and Johan, Mohd Rafie and Juan, Joon Ching (2021) The improved photocatalytic activity of highly expanded MoS2 under visible light emitting diodes. Nanoscale Advances, 3 (4). pp. 1106-1120. ISSN 2516-0230, DOI https://doi.org/10.1039/d0na00936a.
Full text not available from this repository.Abstract
Photocatalytic degradation is a promising method to remove organic pollutants from water. Photocatalysts based on two-dimensional (2D) transition metal dichalcogenides (TMDs) such as MoS2 nanomaterials have gained tremendous popularity. This is due to their narrow band gap and high visible light absorption. Herein, a MoS2 photocatalyst with highly expanded interlayer spaces of 1.51 nm was synthesized in the presence of Pluronic F-127 as a template by a facile one-pot hydrothermal method. This expanded MoS2 (MF-1) managed to photodegrade 98% (2.62 x 10(-2) min(-1)) of methylene blue (MB) dye under irradiation of 1 W visible light-emitting diode (LED) white light. The dominant performance of MF-1 is attributed to the highly expanded interlayer spacing, which exposed more active edge sites. Moreover, the formation of surface defects such as surface cracks and sulfur vacancies (Sv) facilitates the adsorption capacity and in situ generation of reactive oxygen species (ROS). The dominant ROS responsible for the photodegradation of MB is superoxide radical (O-2(-)). The photocatalyst shows good recyclability without deterioration even after five consecutive cycles.
| Item Type: | Article |
|---|---|
| Funders: | University of Malaya under SATU grant from the University of Malaya[ST011-2018], University of Malaya under SATU grant from the University of Malaya[ST020-2019], National Taipei University of Technology-University of Malaya Joint 5 Research Program[NTUT-UM-109-02], Ministry of Science and Technology, China[108-2221-E-027-072] |
| Uncontrolled Keywords: | Terminated molybdenum-disulfide;Hydrogen evolution reaction;Organic pollutants;High-performance;Edge sites;Large-area;Nanocomposite;Degradation;Nanosheets;Electrocatalysts |
| Subjects: | Q Science > QC Physics Q Science > QD Chemistry T Technology > T Technology (General) |
| Divisions: | Deputy Vice Chancellor (Research & Innovation) Office > Nanotechnology & Catalysis Research Centre |
| Depositing User: | Ms Zaharah Ramly |
| Date Deposited: | 18 Jul 2022 04:00 |
| Last Modified: | 18 Jul 2022 04:00 |
| URI: | http://eprints.um.edu.my/id/eprint/34101 |
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