Fabrication of mesoporous POMs/SiO₂nanofibers through electrospinning for oxidative conversion of biomass by H₂O₂and oxygen

Abstract

The oxidation process for mesoporous H5PMo10V2O40/SiO2nanofiber catalyst.

Hydroxyapatite‐Supported Polyoxometalates for the Highly Selective Aerobic Oxidation of 5‐Hydroxymethylfurfural or Glucose to 2,5‐Diformylfuran under Atmospheric Pressure

“…[36,[51][52][53][54][55] Therefore, catalysts containing vanadium and molybdenum could be considered as main candidates for targeting the conversion of 5-HMF to DFF. Our [10,[47][48][49] Our results showed that the conversion and selectivity of converting 5-HMF to DFF depended on the amount of H 5 PMo 10 V 2 O 40 , the basic sites of support, and the Brønsted acidic sites of the hybrids. Compared to neutral or acidic supports, basic supports might provide weak basic sites favoring for oxidation of -OH group in 5-HMF.…”

“…Therefore, catalysts containing vanadium and molybdenum could be considered as main candidates for targeting the conversion of 5‐HMF to DFF. Our group had developed a series of POM solid catalysts including H 5 PMo 10 V 2 O 40 /SiO 2 mesoporous nanofibers, H 5 PMo 10 V 2 O 40 /CeO 2 nanofibers, H 5 PMo 10 V 2 O 40 /chitosan nanofibers, and H 5 PMo 10 V 2 O 40 /LDH (LDH represented MgAl‐layered double hydroxide) [10,47–49] . Our results showed that the conversion and selectivity of converting 5‐HMF to DFF depended on the amount of H 5 PMo 10 V 2 O 40 , the basic sites of support, and the Brønsted acidic sites of the hybrids.…”

“…In the present study, we developed a new approach to preparing POM ((NH 4 ) 5 H 6 PV 8 Mo 4 O 40 ) doped in HAP and investigated their catalytic performance in 5‐HMF cascade conversion into DFF. DFF is generally produced from the transformation of 5‐HMF with a high yield of more than 90 % by homogeneous or heterogeneous catalysts (Table S1, Supporting Information) [10,21–49] . Among reported catalysts, POMs containing V and Mo were proved to be active in targeted aerobic oxidation of 5‐HMF to DFF [42,50] .…”

Selective oxidation of biomass‐based 5‐hydroxymethylfurfural to 2,5‐diformylfuran catalyzed by multicomponent molybdenum‐based catalyst

“…30 Wang et al synthesized H 5 PMo 10 V 2 O 40 /SiO 2 via combined electrospinning and surfactant-directing pore formation technique, which displayed high catalytic efficiency in oxidation of starch and HMF, respectively, affording as high as 0.58 mol per 100 g carboxyl contents and 89.2% yield of DFF. 31 Li and co-workers prepared a series of Zr x Mo y O ⊐ composite oxides for the one-pot direct conversion of fructose to DFF, in which HMF worked as an intermediate. 32 An Anderson-type catalyst CeCu(OH) 6 Mo 6 O 18 prepared by Lü et al could bring out DFF with 99% yield in p-chlorotoluene.…”

One-Pot Synthesis of 2,5-Diformylfuran from Fructose by Bifunctional Polyaniline-Supported Heteropolyacid Hybrid Catalysts

“…Among others, 2,5-diformylfuran (DFF), the partially oxidized product from 5-hydroxymethylfurfural (HMF), is considered as one of the most promising platform molecules owing to its broad potential as an intermediate for pharmaceuticals, fungicides, macrocyclic ligands, and as a cross-linker or monomer for novel polymeric materials [6,7]. Despite the high DFF yields (>90%) from the aerobic oxidation of pure HMF [8][9][10][11][12][13][14][15][16][17][18], the direct synthesis of DFF from fructose via HMF as an intermediate is more attractive since the separation and purification of HMF is energy-intensive because of the unstable characteristic of HMF during the acid-catalyzed HMF production. Nowadays, the development of a facile and highly selective "one-pot" strategy for fructose-to-DFF conversion is challenging.…”