| Title: | Defect engineering-induced porosity in graphene quantum dots embedded metal-organic frameworks for enhanced benzene and toluene adsorption |
| Author(s): | Alivand MS; Tehrani N; Askarieh M; Ghasemy E; Esrafili MD; Ahmadi R; Anisi H; Tavakoli O; Rashidi A; |
| Address: | "Department of Chemical Engineering, The University of Melbourne, Parkville, Victoria 3010, Australia; School of Chemical Engineering, College of Engineering, University of Tehran, Tehran, Iran. School of Chemical Engineering, College of Engineering, University of Tehran, Tehran, Iran; Nanotechnology Research Center, Research Institute of Petroleum Industry, Tehran, Iran. Nanotechnology Research Center, Research Institute of Petroleum Industry, Tehran, Iran. Centre Energie Materiaux Telecommunications, Institut National De La Recherche, Varennes, Quebec, Canada. Department of Chemistry, Faculty of Basic Sciences, University of Maragheh, Maragheh, Iran. School of Chemical, Petroleum and Gas Engineering, Iran University of Science and Technology, Tehran, Iran. School of Chemical Engineering, College of Engineering, University of Tehran, Tehran, Iran. Electronic address: otavakoli@ut.ac.ir. Nanotechnology Research Center, Research Institute of Petroleum Industry, Tehran, Iran. Electronic address: rashidim@ripi.ir" |
| DOI: | 10.1016/j.jhazmat.2021.125973 |
| ISSN/ISBN: | 1873-3336 (Electronic) 0304-3894 (Linking) |
| Abstract: | "The emerging environmental issues necessitate the engineering of novel and well-designed nanoadsorbents for advanced separation and purification applications. Despite recent advances, the facile synthesis of hierarchical micro-mesoporous metal-organic frameworks (MOFs) with tuned structures has remained a challenge. Herein, we report a simple defect engineering approach to manipulate the framework, induce mesoporosity, and crease large pore volumes in MIL-101(Cr) by embedding graphene quantum dots (GQDs) during its self-assembly process. For instance, MIL-101@GQD-3 (V(meso): 0.68 and V(tot): 1.87 cm(3)/g) exhibited 300.0% and 53.3% more meso and total pore volume compared to those of the conventional MIL-101 (V(meso): 0.17 and V(tot): 1.22 cm(3)/g), respectively, resulting in 1.7 and 2.8 times greater benzene and toluene loading at 1 bar and 25 degrees C. In addition, we found that MIL-101@GQD-3 retained its superiority over a wide range of VOC concentrations and operating temperature (25-55 degrees C) with great cyclic capacity and energy-efficient regeneration. Considering the simplicity of the adopted technique to induce mesoporosity and tune the nanoporous structure of MOFs, the presented GQD incorporation technique is expected to provide a new pathway for the facile synthesis of advanced materials for environmental applications" |
| Keywords: | Benzene Graphene quantum dot (GQD) Hierarchical micro-mesoporous MIL-101(Cr) Toluene Volatile organic compounds (VOC); |
| Notes: | "PubMed-not-MEDLINEAlivand, Masood S Tehrani, Neda Haj Mohammad Hossein Askarieh, Mojtaba Ghasemy, Ebrahim Esrafili, Mehdi D Ahmadi, Raziyeh Anisi, Hossein Tavakoli, Omid Rashidi, Alimorad eng Netherlands 2021/09/09 J Hazard Mater. 2021 Aug 15; 416:125973. doi: 10.1016/j.jhazmat.2021.125973. Epub 2021 Apr 29" |
