Adsorption-assisted photocatalytic degradation of methyl orange dye by zeolite-imidazole-framework-derived nanoparticles
- Authors
- Tran V.A.; Kadam A.N.; Lee S.-W.
- Issue Date
- Sep-2020
- Publisher
- Elsevier Ltd
- Keywords
- Adsorption-assisted photocatalytic; Ag@ZnO; Methyl orange; Photocatalyst activity; ZIF8
- Citation
- Journal of Alloys and Compounds, v.835
- Journal Title
- Journal of Alloys and Compounds
- Volume
- 835
- URI
- https://scholarworks.bwise.kr/gachon/handle/2020.sw.gachon/60102
- DOI
- 10.1016/j.jallcom.2020.155414
- ISSN
- 0925-8388
- Abstract
- Zeolite-Imidazolate-Framework-8 (ZIF8) is a typical porous material obtained by strong coordination of Zn2+ ions with imidazole organic linkers. By judicious choice of constituents, ZIF8 can reveal a huge surface area, chemical stability, and well defined pore volume. In this work, well-synthesized ZIF8 exhibited the high adsorption capacity for methyl orange (MO) (19.4 mg of MO/g of ZIF8) via electrostatic, hydrogen bonding, and π-π interactions/stacking interactions. The irradiation of UV–visible light can induce the excitation of electrons in MO molecules. The excited states of MO∗ can have stronger interactions with the active sites of ZIF8 and results in more surface adsorption. Under UV light irradiation, the excited MO∗ was degraded by •OH radicals that were produced from ZIF8 via an excitation pathway. This was proved by the photoluminescence spectra of 2-hydroxyterephthalic acid that was converted from terephthalic acid reacted with •OH radicals. The calcined ZIF8 (ZnO) in air maintained the rhombic-dodecahedral shape and exhibited adsorption-assisted photocatalytic activity. Notably, Ag-loaded ZnO (Ag@ZnO) completely removed the MO dye within 120 min under simulated solar light. The zeolite-imidazole-framework (ZIF8) composites have been successfully developed as a promising multimodal platform for an excellent adsorbent and efficient photocatalyst. © 2020 Elsevier B.V.
- Files in This Item
- There are no files associated with this item.
- Appears in
Collections - 공과대학 > 화공생명공학과 > 1. Journal Articles
![qrcode](https://api.qrserver.com/v1/create-qr-code/?size=55x55&data=https://scholarworks.bwise.kr/gachon/handle/2020.sw.gachon/60102)
Items in ScholarWorks are protected by copyright, with all rights reserved, unless otherwise indicated.