miR-124 plays a neurons-protective role via apoptosis-inhibiting pathway in ischemic stroke.

Porous carbon nanofibers assembled with a nickel nanoparticle (Ni/PCNFO) cathode exhibited outstanding electrochemical performance in Li–S batteries.

The exploitation of novel porous materials for capturing/adsorption of harmful gases is considered a very promising approach to deal with air pollution. Herein, bipyridinium-based ionic covalent triazine frameworks (ICTFs) were synthesized via ZnCl2-catalyzed ionothermal polymerization. The as-prepared ICTFs had a satisfactory total pore volume and specific surface of approximately 0.4582 cm3 g–1 and 1000 m2 g–1, respectively. Moreover, the specific surface area, pore size and distribution, and total pore volumes of ICTFs could be adjusted via ion-exchange of the anion. The obtained ICTFs were explored as the adsorbent for the separation/adsorption of the mixed gases (SO2, CO2, NO, and N2), and they showed the strong adsorption ability for CO2 (2.75 mmol g–1), SO2 (9.22 mmol g–1), and NO (4.05 mmol g–1) at 1 bar and 298 K. This unique design provides a new insight to prepare high-efficiency porous materials for CO2, SO2, and NO capture.

Heteroatom-doped carbon materials have been considered as potential substitutes for Pt-based electrocatalysts for the oxygen reduction reaction (ORR) in alkaline fuel cells. Here we report the synthesis of oxygen-containing nitrogen-doped carbon (ONC) nanosheets through the carbonization of a mixture that contained glucose and dicyandiamide (DCDA). In situ formed graphitic carbon nitride (g-C N ) derived from DCDA provided a nitrogen-rich template, thereby facilitating the formation of ONC nanosheets. The resultant ONC materials with high nitrogen content, high specific surface areas, and highly mesoporous total volume displayed excellent electrochemical performance, including a similar ORR onset potential, half-potential, a higher diffusion-limited current, and excellent tolerance to methanol than that of the commercial Pt/C catalyst, respectively. Moreover, the ONC-850 nanosheet displayed high long-term durability even after 1000 cycles as well as a high electron transfer number of 3.92 (4.0 for Pt/C). Additionally, this work provides deeper insight into these materials and a versatile strategy for the synthesis of cost-effective 2D N-doped carbon electrocatalysts.

Carbon nanofibers (CNF) with a 1D porous structure offer promising support to encapsulate transition-metal oxides in energy storage/conversion relying on their high specific surface area and pore volume. Here, the preparation of NiO nanoparticle-dispersed electrospun N-doped porous CNF (NiO/PCNF) and as free-standing film electrode for high-performance electrochemical supercapacitors is reported. Polyacrylonitrile and nickel acetylacetone are selected as precursors of CNF and Ni sources, respectively. Dicyandiamide not only improves the specific surface area and pore volume, but also increases the N-doping level of PCNF. Benefiting from the synergistic effect between NiO nanoparticles (NPs) and PCNF, the prepared free-standing NiO/PCNF electrodes show a high specific capacitance of 850 F g at a current density of 1 A g in 6 m KOH aqueous solution, good rate capability, as well as excellent long-term cycling stability. Moreover, NiO NPs dispersed in PCNF and large specific surface area provide many electroactive sites, leading to high CO uptake, and high-efficiency CO electroreduction. The synthesis strategy in this study provides a new insight into the design and fabrication of promising multifunctional materials for high-performance supercapacitors and CO electroreduction.