Preparation of magnesium aminoclay-carbon dots/TiO2 as photocatalysts for wastewater management
- Authors
- Bui, Vu Khac Hoang; Koh, Jin-Soo; Lee, Hyun Uk; Park, Duckshin; Lee, Young-Chul
- Issue Date
- Oct-2022
- Publisher
- ELSEVIER SCIENCE SA
- Keywords
- Magnesium aminoclay-carbon dots; TiO2; Photocatalyst; MgAC-CDs/TiO(2 )composites; Water treatment
- Citation
- MATERIALS CHEMISTRY AND PHYSICS, v.290
- Journal Title
- MATERIALS CHEMISTRY AND PHYSICS
- Volume
- 290
- URI
- https://scholarworks.bwise.kr/gachon/handle/2020.sw.gachon/85551
- DOI
- 10.1016/j.matchemphys.2022.126541
- ISSN
- 0254-0584
- Abstract
- Magnesium aminoclay (MgAC) has been used to remove different harmful pollutants from the environment. In this study, MgAC was successfully converted into MgAC-carbon dots (MgAC-CDs) using microwave radiation, which was then used to prepare MgAC-CDs/TiO2 composites for use in water treatment. Pure TiO2, MgAC-CDs, and MgAC-CDs/TiO(2 )were investigated via X-ray powder diffraction, transmission electron microscopy, X-ray photoelectron spectroscopy, Brunauer-Emmett-Teller theory, and photoluminescence. Through these tech-niques, the presence of MgAC-CDs decreased the size of TiO2, and the interaction between TiO(2 )and MgAC-CDs led to the formation of vacant oxygen in TiO2. MgAC-CDs [0.20 g]/TiO(2 )had the best photocatalytic performance in the ultraviolet spectrum/light-emitting diode (LED, in visible spectrum) among all MgAC-CDs/TiO2 com-posites. Preliminary data indicate that a concentration of 1 mg/mL can inactivate an MS2 bacteriophage in 1 h of irradiation under ultraviolet light or LEDs. The high photocatalytic performances of MgAC-CDs/TiO2 can be explained by interactions between MgAC-CDs and TiO2, which forms a layer of vacant oxygen, and also by the remaining MgAC sheet, which contributes to the high specific surface area.
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