Nitrogen-Doped Porous Nanofiber Aerogel-Encapsulated Staphylo-NiS Accelerating Polysulfide Conversion for Efficient Li-S Batteries.

The low conductivity of sulfur substances and the fussy effect of lithium polysulfides (LPS) limit the practical application of lithium-sulfur batteries (LSBs). In this work, NiS is in situ synthesized on N-doped 3D carbon nanofibers with an optimized pore structure as a cathode material for LSBs. The conductive carbon nanofiber skeleton with a hierarchical (micropore-mesopore-macropore) structure etched by Cd can reduce the interface resistance of the cathode and remiss volume expansion during charge-discharge progress.

Rational design of hollow flower-like MoS/MoC heterostructures in N-doped carbon substrate for synergistically accelerating adsorption-electrocatalysis of polysulfides in lithium sulfur batteries.

Lithium-sulfur (Li-S) batteries have been garnered significant attention in the energy storage field due to their high theoretical specific capacity and low cost. However, Li-S batteries suffer from issues like the shuttle effect, poor conductivity, and sluggish chemical reaction kinetics, which hinder their practical development. Herein, a novel hollow flower-like architecture composed of MoS/MoC heterostructures in N-doped carbon substrate (H-MoS/MoC/NC NFs), which were well designed and prepared through a calcination-vulcanization method, were used as high-efficiency catalyst to propel polysulfide redox kinetics.

Self-Adaptive Electronic Structure of Amphoteric Conjugated Ligand-Modified 3 d Metal-C N Smart Electrocatalyst by pH Self-Response Realizing Electrocatalytic Self-Adjustment.

Constructing pH-responsive smart material provides a new opportunity to address the problem that traditional electrocatalysts cannot achieve both alkaline oxygen evolution reaction (OER) and acidic hydrogen evolution reaction (HER) activities. In this study, amphoteric conjugated ligand (2-aminoterephthalic acid, BDC-NH )-modified 3d metal-anchored graphitic carbon nitride (3d metal-C N ) smart electrocatalysts are constructed, and self-adaptation of the electronic structure is realized by self-response to pH stimulation, which results in self-adjustment of alkaline OER and acidic HER. Specifically, the amino and carboxyl functional groups in BDC-NH undergo protonation and deprotonation respectively under different pH stimulation to adapt to environmental changes.

Biocatalyst and colorimetric biosensor of carcinoembryonic antigen constructed via chicken egg white-copper phosphate organic/inorganic hybrid nanoflowers.

In this article, the dual-functional chicken egg white-copper phosphate organic-inorganic hybrid nanoflowers (Cu-NFs), combining the functions of signal amplification and biological recognition, were prepared through a simple one-pot method. The Cu-NFs exhibit excellent biocatalytic activity of peroxidase and polyphenol oxidase. Besides, a biotin-labeled secondary antibody encapsulated Cu-NFs-2 (Cu-NFs-2@Biotin-NHS-Ab) capture probe was prepared by using the interaction between avidin in the egg white and biotin.

Synthesis, Characterization and Optoelectronic Property of Axial-Substituted Subphthalocyanines.

Two novel substituted subphthalocyanines have been prepared introducing m-hydroxybenzoic acid and m-hydroxyphenylacetic acid into the axial position of bromo-subphthalocyanine. The compounds have been characterized by Fourier transform infrared (FT-IR), Nuclear Magnetic Resonance (NMR) and single-crystal X-rays diffraction (XRD) methods. Their photophysical properties show that the axial substitution results into a relatively higher fluorescence quantum efficiency (=5.

Enhanced Electrocatalytic Performance through Body Enrichment of Co-Based Bimetallic Nanoparticles In Situ Embedded Porous N-Doped Carbon Spheres.

Extending available body space loading active species and controllably tailoring the d-band center to Fermi level of catalysts are of paramount importance but extremely challenging for the enhancement of electrocatalytic performance. Herein, a melamine-bridged self-construction strategy is proposed to in situ embed Co-based bimetallic nanoparticles in the body of N-doped porous carbon spheres (CoM-e-PNC), and achieve the controllable tailoring of the d-band center position by alloying of Co and another transition metal M (M = Ni, Fe, Mn, and Cu). The enrichment and exposure of the active sites in the body interior of porous carbon spheres, and the best balance between the adsorption of OH species and the desorption of O induced by optimizing the d-band center position, collectively enhance the oxygen evolution reaction (OER) performance.

Controlling the Chemical Bonding of Highly Dispersed Co Atoms Anchored on an Ultrathin g-CN@Carbon Sphere for Enhanced Electrocatalytic Activity of the Oxygen Evolution Reaction.

Controlling the chemical bonding of an active atom and carbon support is an effective strategy for enhancing the electrocatalytic activity of a metal-nitrogen/carbon catalyst. Herein, highly dispersed Co atoms are successfully prepared by using an ultrathin g-CN@carbon sphere as the support, and subsequently the well-defined Co-N and Co-O bonds on the atomic level are controllably constructed by adjusting the calcination atmosphere. Results show that highly dispersed Co with Co-O and Co-N bonds exhibits excellent oxygen evolution reaction performance in alkaline media at low and high overpotentials, respectively, and outperform most single-atom catalysts reported to date.

Biocatalyst and Colorimetric/Fluorescent Dual Biosensors of HO Constructed via Hemoglobin-Cu(PO) Organic/Inorganic Hybrid Nanoflowers.

In this article, the three-dimensional hemoglobin (Hb)-Cu(PO) organic/inorganic hybrid nanoflowers (Hb-Cu(PO) HNFs) self-assembled by nanopetals were synthesized via a facile one-pot green synthetic method. The compositions and microstructure of the Hb-Cu(PO) HNFs were well-characterized with X-ray diffraction, scanning electron microscopy, transmission electron microscopy, X-ray photoelectron spectroscopy, Fourier transform infrared spectroscopy, and UV-vis spectrometry, respectively. The as-prepared Hb-Cu(PO) HNFs were to be used as a biocatalyst to construct colorimetric/fluorescent dual biosensors.

Two porous luminescent metal-organic frameworks: quantifiable evaluation of dynamic and static luminescent sensing mechanisms towards Fe(3.).

Two novel porous luminescent metal-organic frameworks (MOFs, 1 and 2) have been constructed using 3,4-di(3,5-dicarboxyphenyl)phthalic acid using a hydrothermal method. Both MOFs can work as highly sensitive sensors to Fe(3+) by luminescent quenching. Analyses of the structures indicate a higher quenching efficiency of 2 because of the existence of active -COOH groups.

[Effects of neregulin on rhesus monkey heart failure induced by rapid pacing].

Objective: To investigate the effects of Recombined Human Neuregulin (NRG) on the expression of Glucose transporter (Glut1) in myocardium tissue of Rhesus Monkeys with Pacing-induced Heart Failure and the heart function.

Methods: Twenty four rhesus monkeys were randomly divided into three groups (shame operated group, heart failure group and NRG treated group), each with 8 monkeys. Heart failures were induced by rapid pacing (240 heart beats/min).