Facile preparation, characterization, and formaldehyde elimination performance of MnOx/natural loofah composites. Issue 6 (12th May 2020)

• Record Type: Journal Article
• Authors: Feng, Lili; Zhang, Pengyi; Li, Jinge; Han, Xiao; Tang, Siyao
• Is Part Of: Environmental progress & sustainable energy. Volume 39:Issue 6(2020)
• Page Start: n/a
• Page End: n/a
• Publication Date: 2020-05-12
• Subjects: adsorption -- formaldehyde -- manganese oxides -- natural loofah -- room‐temperature catalytic oxidation; Environmental engineering -- Periodicals; Sustainable engineering -- Periodicals; Environmental chemistry -- Periodicals; 333.7
• DOI: 10.1002/ep.13437
• Languages: English
• ISSNs: 1944-7442

Abstract

Abstract: MnOx /natural loofah composites were first prepared by a facile in‐situ reduction process under ambient conditions, in which natural loofah was impregnated in potassium permanganate solution for different time. MnOx nanoparticles were loaded on both exterior and interior of the fibrous strands of loofah after impregnation from SEM observations. The crystal structure and chemical properties of MnOx in the composites were confirmed to birnessite‐type MnOx with the interplanar spacing of ~0.24 nm and Mn oxidation state of 3.6 by XRD, Raman, FTIR, TEM, and XPS. Such produced MOx /loofah composites showed excellent performance for the catalytic oxidative decomposition and adsorption of formaldehyde at room temperature. The composites prepared with longer impregnation time exhibited better catalytic performance. The decomposition mechanism of HCHO over the MOx /loofah composites involved adsorbed HCHO on the loofah was oxidized into intermediates first and further CO2 by MnOx through in‐situ DRIFTS analysis.