| Title: | Novel cryptomelane nanosheets for the superior catalytic combustion of oxygenated volatile organic compounds |
| Author(s): | Dinh MTN; Nguyen CC; Phan MD; Duong MK; Nguyen PHD; Lancelot C; Nguyen DL; |
| Address: | "The University of Da-Nang, University of Science and Technology, 54, Nguyen Luong Bang, Da Nang, Viet Nam. Electronic address: ndmtuan@dut.udn.vn. Institute of Research and Development, Duy Tan University, Da Nang 50000, Viet Nam; Faculty of Environmental and Chemical Engineering, Duy Tan University, Da Nang 50000, Viet Nam. The University of Da-Nang, University of Science and Technology, 54, Nguyen Luong Bang, Da Nang, Viet Nam. Institute of Chemical Technology-Vietnam Academy of Science and Technology, Ho Chi Minh City, Viet Nam. Univ. Lille, CNRS, Centrale Lille, ENSCL, Univ. Artois, UMR 8181 - UCCS - Unite de Catalyse et Chimie du Solide, F-59000 Lille, France" |
| DOI: | 10.1016/j.jhazmat.2021.126111 |
| ISSN/ISBN: | 1873-3336 (Electronic) 0304-3894 (Linking) |
| Abstract: | "This work offers a novel pathway to prepare cryptomelane manganese oxides nanosheets as an superior catalyst for the catalytic combustion of oxygenated volatile organic compounds. The tunnel cryptomelane manganese oxides nanosheets were prepared from layered birnessite via simultaneously tuning pH and molar ratio (R(OK)) of the redox-precipitation between oxalic acid and KMnO(4). Thus, few-layered cryptomelane nanosheets possessing the most predominantly exposed (211) facet are generated at low pH (5.2-5.6), which intensifies the surface area of thin crystal cryptomelane nanosheets up to 177 m(2)g(-1) and weakens Mn-O bonds. Moreover, high R(OK) results in low manganese average oxidation state (AOS), greater oxygen vacancies and better low-temperature reduction and oxygen mobility. Such features significantly maneuver the catalytic activity of the cryptomelane nanosheets catalysts for the complete oxidation of oxygenated volatile organic compound (e.g., 2-propanol, acetone) at low temperature (170-230 degrees C). Moreover, the catalysts show high stability for 48 h. The presented catalyst discloses an avenue to address current obstacles in the catalytic oxidation of volatile organic compounds" |
| Keywords: | 2-propanol Acetone Catalytic combustion Cryptomelane Nanosheets Oxygen vacancies; |
| Notes: | "PubMed-not-MEDLINEDinh, Minh Tuan Nguyen Nguyen, Chinh Chien Phan, Manh Duy Duong, Minh Khoa Nguyen, Phuc Hoang Duy Lancelot, Christine Nguyen, Dinh Lam eng Netherlands 2021/05/22 J Hazard Mater. 2021 Sep 5; 417:126111. doi: 10.1016/j.jhazmat.2021.126111. Epub 2021 May 14" |
