Xiaoting Yu,Yannan Chen,Shanghua Xing,Deyang Yu,Mingqian Tan
Food-borne nanoparticles (FNs) may have potential for microelement delivery due to their good biocompatibility and healthy benefits. In this paper, hydrophilic FNs with ultra-small size of 1.7 nm were prepared from the water extract solution of Auricularia auricula by hydrothermal method. The structural characterization showed that Zn(II)-FNs were formed after the interaction of abundant functional groups like amino, hydroxyl, and carboxyl functional groups on the surface of FNs with Zn 2+ . The Zn(II)-FNs showed better cell compatibility than ZnSO 4 and zinc gluconate with no visible cytotoxicity at concentrations up to 75 μg/mL for the normal rat kidney cells. Less than 5% hemolysis rate was found when the concentration of Zn(II)-FNs was 5 mg/mL after incubation for 3h. The biodistribution experiments indicated that Zn(II)-FNs had no obvious toxic effect after being orally administrated at a dose of 500 mg/kg mouse body weight, and Zn(II)-FNs were present in the stomach, intestine, lung, liver, and kidney. Our data indicated that FNs collected from Auricularia auricula water extract solution might act as a safe and effective nanocarrier for Zn(II).
Wei Liu,Xiaoyu Liu,Fanghua Ning,Sidra Subhan,Yuyu Liu,Qian Li,Jiujun Zhang,Shigang Lu,Jin Yi
Vanadium-based oxides are considered desirable cathode materials for aqueous zinc ion batteries owing to their high theoretical specific capacity and open crystal structure. However, the comparatively insufficient capacity and poor stability of vanadium-based oxides restrict their potential applications for the further development of aqueous zinc ion batteries. Herein, K+ and Al3+ were simultaneously pre-inserted into vanadium oxide through a facile hydrothermal process to construct a robust K0.098Al0.12V2O5·0.86H2O (denoted as KAlVOH) nano-microsphere with a large interlayer spacing of 13.26 Å. The obtained results showed that pre-embedded K+ plays a vital role in maintaining the structural stability of the layered framework upon cycling. Meanwhile, the pre-insertion of Al3+ widened the interlayer spacing, which promoted zinc transport kinetics and increased the specific capacity. Consequently, the proposed KAlVOH cathode material showed high-performance zinc ion storage with a significant specific capacity of up to 424 mA h g−1 at 0.05 A g−1. This was further accompanied by an excellent rate capability (up to 210 mA h g−1 at 10 A g−1) and impressive long cycling stability (96% capacity retention after 3000 cycles at 5 A g−1). Moreover, distinctive K+/Al3+ ratios and alkali metal analogues were also investigated for this heterovalent dual-cation pre-insertion strategy. The novel design of the K+ and Al3+ co-inserted vanadium oxide cathode is envisaged as a promising alternative for the construction of robust layered vanadium-based cathodes for rapid and stable zinc ion storage.
危险品化学品经营许可证（带存储）