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In this study, a novel strategy is developed for the first time, referred to as high‐concentration cobalt ion‐assisted hydration (HCCAH) utilizing zeolitic imidazolate framework‐67 (ZIF‐67) as a precursor, to produce independent and flat α‐cobalt hydroxide nanosheets (CHN). These nanosheets offer abundant contact sites for binding with virus surface proteins. The formation of CHN involves the in situ transformation from ZIF‐67, due to the matching of the hydrolysis rate of ZIF‐67 and in situ growth rate of cobalt hydroxide orchestrated by high concentration of cobalt ions. Notably, the CHN contains a higher proportion of trivalent cobalt, which is shown to enhance the binding with the Severe Acute Respiratory Syndrome Coronavirus 2 (SARS‐CoV‐2) Spike protein and induce protein structural denaturation, as demonstrated by molecular dynamics (MD) simulation. Antiviral experiments using pseudovirus and authentic viruses have confirmed the promising antiviral performance of CHN. Furthermore, both in vitro and in vivo experiments have demonstrated the excellent biocompatibility of CHN. This research opens up new possibilities for the application of cobalt hydroxide nanosheets and serves as a valuable reference for the design of antiviral nanomaterials. [ABSTRACT FROM AUTHOR]

High performance electromagnetic (EM) interference shielding composites are of high demand due to increasing EM wave radiation pollution. In this work, GO/NiNCs/PMMA microcellular foams with different GO/NiNCs gradient and 3D conductive filler framework were fabricated by thermal reduction and supercritical CO2 foaming process. With the crosslink of 1D NiNCs and 2D GO sheets, GO/NiNCs framework with electrical conductivity varied from 1.15 × 10−4 to highest 1.09 × 10−1 S/m is fabricated, exhibiting absorption‐dominated electromagnetic interference shieling effectiveness (EMI SE) of 53.62 dB and specific EMI SE of 48.44 dB g−1 cm3 in X‐band. The density of GO/NiNCs/PMMA microcellular foams achieved lowest value of 0.623 g/cm3. Moreover, the foams showed excellent thermal conductivity and compressive strength of 178.76 MPa, indicating excellent application potential in aerospace and electronic field. The thermoplastic polymer matrix also indicates great potential in recycle of the foam material. [ABSTRACT FROM AUTHOR]

Flower-like and pompon-like titanium dioxide (TiO2) anode materials are of interest due to various characteristics such as the excellent transport kinetics of lithium ions, favorable safety performance, low volume expansion coefficient, and special shapes. The TiO2 anode materials in flower-like or pompon-like shapes were prepared by applying the normal-pressure hydrolysis-ion exchange of potassium (K) salt. Furthermore, the influences of different calcination temperatures on the phase structure, shape, and electrochemical performance of the materials were investigated. The results show that TiO2 prepared by applying the aforementioned technique within the test temperature range appears in anatase form. Moreover, TiO2 crystals vary from flower-like to pompon-like materials with increasing calcination temperature. The materials show optimal electrochemical performance at a calcination temperature of 700 °C: the specific charge/discharge capacity in the first cycle reaches 250.2 mAh·g−1 at a current density of 20 mA·g−1 and a capacity of 185.3 mAh·g−1 after 20 cycles at a current density of 100 mA·g−1, retaining 85.8% of the original capacity. [ABSTRACT FROM AUTHOR]