Herein, we constructed one-dimensional hollow nanofiber catalyst composed of tightly-packed multiphase metal oxides of Mn2O3  and Cu1.4Mn1.6O4  by electrospinning and tailored thermal treatment procedure. The characterization results comprehensively confirmed the special morphology and composition of various comparative catalysts. This strategy endows the catalyst with the abundant interfacial manner of component Mn2O3  and Cu1.4Mn1.6O4  nanocrystal. Impressively, the tuning thermal treatment renders tailored Cu(I) sites and surface oxygen species of the catalyst thus affording optimized oxygen vacancy for reinforced oxygen adsorption, while the concomitant enhanced lattice oxygen activity in the constructed composite catalyst ensures the higher catalytic oxidation ability. More importantly, the regulated proportion of oxygen vacancy and lattice oxygen in the composite catalyst was obtained in the best catalyst, benefiting to accelerate the reaction cycle. Compared to other counterparts obtained by different temperatures, the CMO-500 sample exhibited superior selective aerobic 5-hydroxymethylfurfural (HMF) oxidation to 2, 5-furandicarboxylic acid (FDCA, 96% of yield) in alkali-bearing aqueous solution using O2  at 120 °C, which was resulted from the above-mentioned composition optimization and interfacial engineering reinforced surface oxygen consumption and regeneration cycle. The reaction mechanism was further proposed to uncover the lattice oxygen and oxygen vacancy participating HMF conversion process.

Enabling efficient aerobic 5-hydroxymethylfurfural oxidation to 2,5-furandicarboxylic Acid in water by interfacial engineering reinforced Cu-Mn oxides hollow nanofiber.

Although metal-carbon combination has been demonstrated promotive efficiency in advanced oxidation process(AOP), multidimensional coupling by exploiting metal-carbon interaction, dual-metal redox cycle, and photothermal synergetic catalysis remains rare in AOP. Here,...

Carbon framework encapsulated CoMn2O4 spinel derived from electrospun nanofiber coupling with photothermal approach reinforces PMS activation to eliminate 2,4-dichlorophenol

Enabling room-temperature reductive C−N coupling of Nitroarenes: Combining homogeneous with heterogeneous synergetic catalysis mediated by light

Tetracycline hydrochloride (TC) is a typical refractory organic pollutant, and is frequently detected in different water environments, which will increase microbial drug resistance, destroy ecosystem and threaten human health. It...

Synergistic effect of PMS activation by LaCoO3/g-C3N4 for degradation of Tetracycline hydrochloride: performance, mechanism and phytotoxicity evaluation

Heterogeneous peroxymonosulfate (PMS) activation for the mineralization of pollutants has attracted growing attention, while alloying bimetal catalysts afford big promises in synergetic catalysis. Here, by an alteration of electrospun precursor, one-dimensional carbon nanofiber (CNF) integrated with Prussian blue analogs (PBA)-derived alloyed fine plasmonic FeNi3 hybrid catalyst (FeNi3@CNF) was constructed by electrospinning technique with subsequent confinement calcination. The amount of PBA in fiber precursor and thermal treatment temperature were alternatively adjusted to control the distribution and concentration of alloyed FeNi3 in carbon nanofiber. This unique structure combines the advantages of abundant internal porosity of N-doping carbon fiber and uniforms active FeNi3 alloys with highly-exposed reactive sites, facilitating the electron transport and proximity of reactant molecules in catalytic oxidation. The synergistic and interfacial effect of optimal FeNi3@CNF endowed the ultra-fast degradation activity against bisphenol A (BPA) through rapid persulphate activation to generate four reactive active species. Specifically, 20 mg L−1 of BPA was completely degraded within 4 min with a reaction rate constant of 2.736 min−1. Impressively, by innovating the utilization of the Prussian blue precursor in electrospinning, the optimal FeNi3@CNF shows 18.5, 101.3, and 248.5 times activity enhancement in BPA degradation compared to that of [email protected], [email protected], and Fe&[email protected], revealing the appreciable synergy of bimetallic alloys in PMS activation. In addition, the improved catalytic performance of FeNi3@CNF under light irradiation was also simulated, confirming that the enhanced photothermal conversion ability of plasmonic alloys and carbon fiber advance the degradation of BPA. 

Xuyu Wang

Papers

Interfacial engineering coupling with tailored oxygen vacancies in Co2Mn2O4 spinel hollow nanofiber for catalytic phenol removal