Shougang Chen

Superhydrophobic surfaces are promising for anti-icing applications by minimizing solid–liquid contact and ice adhesion, yet maintaining the Cassie–Baxter state at low temperatures remains challenging. The increased surface energy of supercooled water can exceed the stabilizing Laplace pressure of surface micro/nanostructures, inducing wetting transition and ice accretion. Herein, a low-temperature-stable P-SiO₂/TiN@F superhydrophobic coating was fabricated by tailoring the structural dimensions through the proportion of nano-TiN particles and hollow microscale SiO₂ spheres. The optimized architecture establishes a Laplace pressure–surface energy balance that stabilizes the Cassie–Baxter state under low-temperature conditions. Moreover, the hierarchical TiN-modified hollow SiO₂ structure constructs dual energy barriers, further suppressing wetting transition and reducing ice adhesion strength to 14.3 kPa. The hollow SiO₂ structure also suppresses heat dissipation, enhancing the photothermal conversion of TiN. Consequently, the coating rapidly reaches 60.8 °C within 70 s, enabling complete deicing within 20 s under solar irradiation. The coating maintains a water contact angle above 150° at low temperatures and delays freezing initiation to 795 s. Furthermore, fluorosilane modification provides excellent mechanical and cyclic deicing durability, with ice adhesion strength remaining below 20 kPa after 100 deicing cycles. This work demonstrates a rational structural design strategy for integrating low-temperature wettability stability, photothermal deicing, and long-term durability in multifunctional composite anti-icing coatings.

Developing multifunctional protective coatings with long‐term durability, UV resistance, and autonomous healing capability is crucial for addressing corrosion challenges in harsh service environments. Herein, a hierarchically interface‐programmed polyurethane composite coating is constructed by covalently grafting an antioxidant into the polymer backbone and embedding photothermal‐active polyacrylonitrile/cobalt–manganese–nickel layered double hydroxide (LDH) nanofibers via electrospinning and template etching. The antioxidant‐modified matrix suppresses photooxidative degradation, while the LDH nanofillers enable efficient solar‐to‐thermal conversion, ion trapping, and strong interfacial hydrogen bonding. These interfacial interactions created “rivet‐like” anchoring sites, significantly improving coating compactness and interfacial adhesion stability. The composite coating exhibited rapid and efficient solar‐triggered self‐healing, achieving self‐healing efficiency of 98.3% within 5 min illumination. Even after 360 h of UV aging, the coating retained high gloss, mechanical integrity, and self‐healing capability. Electrochemical analysis confirmed superior long‐term corrosion resistance. This work provides a molecular‐to‐hierarchical design strategy for durable, sunlight‐adaptive coatings with integrated self‐healing, anti‐aging, and anticorrosion functions, offering promising applications in marine, transportation, and outdoor infrastructure.

Non-interfacial Ni vacancies in NiS/NiSe ₂ heterojunctions were successfully engineered via in situ selenization of a Ni _2.8 S ₂ precursor, resulting in significantly improved hydrogen evolution reaction activity.

Humid environment leads to microbial growth, and adsorption of droplets containing bacteria can purify the air. The main challenges are high adsorption rate of water vapor and bacteria killing. A new composite adsorbent MIL‐101(Cr)@LiCl (ML) is prepared by encapsulating LiCl in MIL‐101(Cr), and it is doped into the skeleton of PAAcK hydrogel. By modulating the ML content within the hydrogel matrix, the H ₂ O capture capability, Contact‐Electro‐Catalytic (CEC) performance, and conductivity of PAAcK@MIL‐101(Cr)@LiCl (PML) are tuned, enabling the innovative integration of continuous water capture and efficient environmental purification. When adding 10% ML, the moisture absorption rate increased by 2.28 times (2.48 g g ⁻¹ ). Monte Carlo simulation shows that the moisture absorption is mainly contributed by Cr ³⁺ , F, and ‐COOH in MIL‐101(Cr). The antibacterial mechanism of CEC caused by the contact between water and PML is innovatively proposed. The doping of ML leads to the decrease of charge transfer barrier. Chemical reaction driven by charge transfer, OH, and ·O ₂ ^‐ are detected, and the antibacterial rate of PML reached 99.97%. By designing the sandwich structure and customizing the directional transmission of water to the electrode interface, the hydrogen production from air reached 149.63 L m ² h ⁻¹ , and the Faraday efficiency is close to 90%.