| Title: | Ultrasonically-assisted synthesis of CeO(2) within WS(2) interlayers forming type II heterojunction for a VOC photocatalytic oxidation |
| Author(s): | Doustkhah E; Hassandoost R; Yousef Tizhoosh N; Esmat M; Guselnikova O; Hussein NA; Khataee A; |
| Address: | "Koc University Tupras Energy Center (KUTEM), Department of Chemistry, Koc University, 34450 Istanbul, Turkey. Electronic address: edoustkhahheragh@ku.edu.tr. Research Laboratory of Advanced Water and Wastewater Treatment Processes, Department of Applied Chemistry, Faculty of Chemistry, University of Tabriz, 51666-16471 Tabriz, Iran. International Center for Materials Nanoarchitechtonics (MANA), National Institute for Materials Science (NIMS), 1-1 Namiki, Tsukuba, Ibaraki 305-0044, Japan; Materials Science and Nanotechnology Department, Faculty of Postgraduate Studies for Advanced Sciences (PSAS), Beni-Suef University (BSU), Beni-Suef 62511, Egypt. Research School of Chemistry & Applied Biomedical Sciences, National Research Tomsk Polytechnic University, Lenin Avenue 30, Tomsk 634050, Russia. RIKEN Center for Emergent Matter Science, 2-1 Hirosawa, Wako, Saitama 351-0198, Japan. Research Laboratory of Advanced Water and Wastewater Treatment Processes, Department of Applied Chemistry, Faculty of Chemistry, University of Tabriz, 51666-16471 Tabriz, Iran; Department of Environmental Engineering, Gebze Technical University, 41400 Gebze, Turkey. Electronic address: a_khataee@tabrizu.ac.ir" |
| DOI: | 10.1016/j.ultsonch.2022.106245 |
| ISSN/ISBN: | 1873-2828 (Electronic) 1350-4177 (Print) 1350-4177 (Linking) |
| Abstract: | "Here, we investigate the band structure, density of states, photocatalytic activity, and heterojunction mechanism of WS(2) with CeO(2) (CeO(2)@WS(2)) as a photoactive heterostructure. In this heterostructure, CeO(2)'s growth within WS(2) layers is achieved through ultrasonicating WS(2) and intercalating CeO(2)'s precursor within the WS(2) interlayers, followed by hydrothermal treatment. Through a set of density functional calculations, we demonstrate that CeO(2) and WS(2) form an interface through a covalent bonding that can be highly stable. The electrochemical impedance spectroscopy (EIS) found that the CeO(2)@WS(2) heterostructure exhibits a remarkably higher conductivity (22.23 mS cm(-2)) compared to either WS(2) and CeO(2), assignable to the interface in CeO(2)@WS(2). Furthermore, in a physically mixed CeO(2)-WS(2) where the interaction between particles is noncovalent, the resistance was significantly higher (0.67 mS cm(-2)), confirming that the heterostructure in the interface is covalently bonded. In addition, Mott-Schottky and the bandgap measurements through Tauc plots demonstrate that the heterojunction in CeO(2) and WS(2) is type II. Eventually, the CeO(2)@WS(2) heterostructure indicated 446.7 micromol g (-1) CO(2) generation from photocatalytic oxidation of a volatile organic compound (VOC), formic acid, compared to WS(2) and CeO(2) alone" |
| Keywords: | CeO(2) Formic acid oxidation Heterostructure Layered WS(2) Photocatalytic oxidation Ultrasonically intercalated CeO(2); |
| Notes: | "PubMed-not-MEDLINEDoustkhah, Esmail Hassandoost, Ramin Yousef Tizhoosh, Negar Esmat, Mohamed Guselnikova, Olga Hussein N Assadi, M Khataee, Alireza eng Netherlands 2022/12/05 Ultrason Sonochem. 2023 Jan; 92:106245. doi: 10.1016/j.ultsonch.2022.106245. Epub 2022 Nov 28" |
