Fabrication of ordered mesoporous POMs/SiO2–NH2 nanofibers for production of DFF from 5-HMF for cellulose wastewater resource recovery. (August 2021)

• Record Type: Journal Article
• Authors: Wu, Jinghui; Yan, Siqi; Wang, Chi; Lay, Chyi-How; Wang, Xiaohong; Wang, Xianze; Huo, Mingxin
• Is Part Of: Chemosphere. Volume 277(2021)
• Publication Date: 2021-08
• Subjects: Polyoxometalates -- Mesoporous nanofibers -- 5-Hydroxymethylfurfural -- 2, 5-Diformylfuran -- Resource recovery; Pollution -- Periodicals; Pollution -- Physiological effect -- Periodicals; Environmental sciences -- Periodicals; Atmospheric chemistry -- Periodicals; 551.511
• DOI: 10.1016/j.chemosphere.2021.130316
• Languages: English
• ISSNs: 0045-6535

Abstract

Abstract: 5-hydroxymethylfurfural (5-HMF) is a biomass cellulose platform product that can be transformed into the valuable resource 2, 5-diformylfuran (DFF). Polyoxometalates (POMs) have important applications in resource recovery technologies and cellulose wastewater treatment. Ordered mesoporous H5 PMo10 V2 O40 /SiO2 –NH2 (wt%) nanofibers (HPMoV/meso-SiO2 -NH2 (wt%)) were synthesized by the combining in-situ fabrication and electrospinning techniques, using H5 PMo10 V2 O40 (HPMoV) and organic-silica as precursors. Aiming the recovery and transformation of 5-HMF, aerobic oxidation of 5-HMF was explored using these nanofibers as catalysts, while the best yield of DFF (90.0%) was obtained upon HPMoV/meso-SiO2 -NH2 (23%) nanofibers after 8 h at 120 °C using oxygen (1.0 MPa). The selectivity to DFF was improved by changing the hydrophilicity of the HPMoV@SiO2 nanofibers to hydrophobicity by modifying SiO2 nanofibers with –NH2 R compared to mesoporous SiO2 nanofibers, which allowed the formed DFF to be isolated. In the recycling test, HPMoV@SiO2 –NH2 showed good performance, and no leaching of active sites from SiO2 –NH2 due to the interactions between them occurred after 10 cycles. The production of DFF from the real cellulosic wastewater was obtained with 118% yield based on 5-HMF conversion by HPMoV/meso-SiO2 -NH2 (23) and oxygen, which was contributed to the one-pot conversion of sugar, furan and 5-HMF in the wastewater. Graphical abstract: Image 1 Highlights: Mesoporous H5 PMo10 V2 O40 /SiO2 –NH2 nanofibers was fabricated to fulfill 5-HMF conversion. Applying to cellulose wastewater treatment and gain valuable economic products. It obtained 90.0% yield of DFF at a 93.2% HMF conversion. HPMoV/SiO2 –NH2 (f) showed higher stability.