A Robust Solution-Based Approach to Monodisperse Hybrid Janus Nanofibers

Monodisperse hybrid Janus nanofibers with the structure that one Au nanoparticle(AuNP)is connected to one end of a polymeric nanofiber were prepared by the self-assembly between polymeric micelles and the tadpole-like conjugates resulting from one-to-one complexation of long DNA chains with AuNPs.

Electrospinning Janus Type CoO_(x)/C Nanofibers as Electrocatalysts for Oxygen Reduction Reaction

Nanofibers with unique structures and multiple components have attracted more and more attention,which could combine multi-functions in one entity.Janus-type biphasic nanofibers with unique structure can be quickly obtained by electrospinning technology.We produced CoO_(x)/C nanofibers with Janus structure by self-made side-by-side electrospinning spinneret,combined with electrospinning technology and heat treatment.CoO_(x)/C nanofibers had a large amount of graphitic carbon distributed on one half of the Janus nanofiber,and CoO_(x)/C nanoparticles were embedded in the other half of the Janus nanofiber and distributed uniformly.CoO_(x)/C acted as ORR catalysis,and graphitic carbon,pridinc-N and CoO_(x) in CoO_(x)/C had a synergistic effect on their catalytic activity.The results confirmed that CoO_(x)/C was dominated by four-electron pathway under alkaline conditions,and the Tafel slope was lower than that of commercial Pt/C catalysts.The preparation method of this work is simple and easy,the structure is controllable,and the composition is adjustable,which provides a feasible way for preparing Janus structure nanofibers with different functions.

Reconfiguration and self-healing integrated Janus electrospinning nanofiber membranes for durable seawater desalination

Janus electrospinning nanofiber membranes have attracted extensive attention in the fields such as solar-driven interfacial desalination,liquid filtration,and waterproof and breathable fabrics.However,the Janus structures suffer from weak interfacial bonding and vulnerability to damage,making the durability and sustainability are highly sought after in real-word applications.Herein,we fabricate the simply reconfigurable and entirely self-healing Janus evaporator by electrospinning polypropylene glycol based polyurethane(PPG@PU)and polydimethylsiloxane based polyurethane-CNTs(PDMS@PU-CNTs)with different wettability,which are both designed based on dynamic Diels–Alder(DA)bond.The interface of the Janus membrane is stitched by the covalent bonds to directly improve the interface adhesion to 22 N·m−1,constructing an integrated evaporator,and thereby achieving a stable desalination rate of 1.34 kg·m−2·h−1 under one sun.Reversible dissociation of DA networks allows the evaporators for self-healing and reconfiguration abilities,after which the photothermal performance is maintained.This is the first work for the crosslinked self-healing polymer to be directly electrospun,achieving the improved interfacial bond and reconfiguration of entire evaporators,which presented promising new design principles and materials for interfacial solar seawater desalination.