Tungsten oxide nanowire clusters anchored on porous carbon fibers as a sulfur redox mediator for lithium-sulfur batteries.

Addressing the sluggish redox kinetics of sulfur electrodes and mitigating the shuttle effect of intermediate lithium polysulfides (LiPS) are crucial for the advancement of high-energy lithium-sulfur batteries. Here, we introduce a pioneering flexible self-supporting composite scaffold that incorporates tungsten oxide nanowire clusters anchored on core-shell porous carbon fibers (WO/PCF) for sulfur accommodation. The core of PCF serves as a robust electrode supporting scaffold, whereas the porous shell of PCF provides a 3D interconnected conductive network to accommodate sulfur, restrain polysulfide diffusion and buffer electrode expansion.

An amorphous MoS modified g-CN composite for efficient photocatalytic hydrogen evolution under visible light.

In this work, an MoS /g-CN composite photocatalyst was successfully fabricated by a sonochemical approach, where amorphous MoS was synthesized using a hydrothermal method with NaMoO·HO, HSiO(WO) and CHCSNH as precursors, and g-CN nanosheets were produced using a two-step thermal polycondensation method. The hydrogen-evolution performance of the MoS /g-CN composite was tested under visible light. The results show that the H-evolution rate of the MoS /g-CN (7 wt%) photocatalyst reaches a maximum value of 1586 μmol g h, which is about 70 times that of pure g-CN nanosheets.

Mesoporous anodic α-FeO interferometer for organic vapor sensing application.

In this work, we reported the utilization of mesoporous α-FeO films as optical sensors for detecting organic vapors. The mesoporous α-FeO thin films, which exhibited obvious Fabry-Perot interference fringes in the reflectance spectrum, were successfully fabricated through electrochemical anodization of Fe foils. Through monitoring the optical thickness of the interference fringes, three typical organic species with different vapor pressures and polarities (hexane, acetone and isopropanol) were applied as probes to evaluate the sensitivity of the α-FeO based interferometric sensor.