An unsymmetrical binuclear iminopyridine-iron complex and its catalytic isoprene polymerization.

A series of chloride-bridged unsymmetrical mixed Fe(ii)-HS/Fe(ii)-LS binuclear structures has been prepared and characterized. Upon activation with MAO, highly efficient catalytic polymerization of isoprene was achieved, delivering an ultra-high molecular weight (catalyst loading = 2.5 ppm, Mn = 1.

Janus Polymer Composite Electrolytes Improve the Cycling Performance of Lithium-Oxygen Battery.

The liquid electrolytes in lithium-air (oxygen) batteries are prone to volatilize, leak, flame, and cause uneven deposition of lithium during cycling, which makes the batteries to face serious problems in terms of safety and cycling stability. A novel Janus quasi-solid composite polymer electrolyte was fabricated by perfluorosulfonic acid (Nafion) membranes with tunable thickness and poly(vinylidene fluoride)-hexafluoropropylene (PVDF-HFP). The Nafion membranes not only guarantee the mechanical strength of the composites but also effectively prevent the migration of certain anions and macromolecules.

A mesoporous tungsten carbide nanostructure as a promising cathode catalyst decreases overpotential in Li-O batteries.

Lithium-oxygen (Li-O) batteries as promising energy storage devices possess high gravimetric energy density and low emission. However, poor reversibility of electrochemical reactions at the cathode significantly affects the electrochemical properties of nonaqueous Li-O batteries, and low charge-discharge efficiency also results in short cycle-life. In this work, functional air cathodes containing mesoporous tungsten carbide nanoparticles for improving the reversibility of positive reactions in Li-O cells are designed.

A facile approach to preparation of silica double-shell hollow particles, and their application in gel composite electrolytes.

Double-shell hollow particles (DSHPs) have attracted significant attention due to their diverse potential applications. DSHPs are usually obtained by multi-step sacrificial template method which is tedious and inefficient. In this work, a facile synthesis of silica DSHPs has been developed via a novel one-step template method, which is using single-hole hollow particles (SHHPs) as the templates.

Preparation and properties of ion-imprinted hollow particles for the selective adsorption of silver ions.

Four kinds of silver ion-imprinted particles (Ag-IIPs) with different morphologies were prepared by the surface ion-imprinting technology (SIIT) and were used for the selective removal and concentration of silver ions from wastewater. The favorable adsorptivity and selectivity of Ag-IIPs for Ag(+) were confirmed by a series of adsorption experiments at a suitable pH value. The adsorption mechanism was elucidated by analyzing the adsorption isotherms, adsorption thermodynamics, and adsorption kinetics systematically.

Preparation, characterization, and properties of hollow Janus particles with tailored shapes.

As compared to the traditional solid Janus particles, the hollow Janus particles have inspired growing interests due to their diverse potential applications. Herein, the novel hollow Janus particles with elephant trunk-like and acorn-like shapes were prepared by seed emulsion polymerization. In contrast to traditional template methods, the hollow structure was obtained during the preparation by one-step swelling method.

[Study on the serotype, virulence genes and pulsed field gel electrophoresis molecular typing of Vibrio parahaemolyticus isolated from clinical patients].

Objective: To investigate the serotype virulence genes and molecular typing characteristics of Vibrio Parahaemolyticus isolated from diarrhea samples among 2007 -2012.

Methods: The serotype was detected by using serological agglutination test. Thermo-stable direct hemolysin (tdh) and tdh-related hemolysin (trh) were detected by using real time PCR methods.