Tingyu Xue,Fang Liu,Bin Lu,Qingrong Dong,Bin Zhao,Tianqing Chen,Kun Zhang,Jianguo Li,Jiangfeng Du
Radioactive cesium (Cs) is a significant concern due to its role as a major byproduct of nuclear fission and its potential for radioactive contamination. Internal contamination with radioactive Cs is characterized by immoderate production of reactive oxygen species (ROS), resulting in severe radiation damage. Therefore, the development of therapeutic strategies should focus on enhancing the excretion of radioactive Cs and reducing radiation-induced oxidative damage. However, current therapeutic drugs like Prussian blue (PB) have limited efficacy in addressing these issues. In this study, we present Cu3[Fe(CN)6]2 (CuFe) nanoparticles, a Prussian blue analog (PBA), which can not only efficiently sequester Cs but also exhibit resistance against radiation damage. The results of the adsorption studies demonstrate that CuFe outperforms PB in terms of adsorption performance. Further mechanistic investigations indicate that the increased adsorption capacity of CuFe may be attributed to the presence of additional defects resulting from the [Fe(CN)6] missing linkers. Moreover, CuFe mimics the functions of catalase (CAT) and superoxide dismutase (SOD) by effectively eliminating O2˙− and H2O2 while scavenging ˙OH, thereby mitigating ROS induced by radiative Cs. Importantly, in vivo study confirms the efficient Cs decorporation capability of CuFe. The fecal cumulative excretion rate of CuFe reaches 69.5%, which is 1.45 times higher than that of PB (48.8%). These findings demonstrate that CuFe exhibits excellent Cs removal performance and ROS scavenging ability, making it an attractive candidate for the treatment of Cs contamination.
Prussian blue analogues (PBAs) have recently attracted extensive interests as a new class of cathode materials for rechargeable batteries. Copper hexacyanoferrate, a typical Prussian blue analogue with the chemical formula Cu 3 [Fe(CN) 6 ] 2 , has been synthesized by solution precipitation method and investigated as a cathode material for sodium-ion batteries. The galvanostatic cycling tests show a specific capacity of 44 mA h g −1 at a current density of 20 mA g −1 , and the capacity retention can be 57.1% after 50 cycles. The material can also deliver a specific capacity of 37 mA h g −1 and 25 mA h g −1 at a rate of 50 mA g −1 and 100 mA g −1 , respectively. Furthermore, the material exhibits a high reduction peak at 3.32 V vs. Na + /Na, which brings more power to sodium-ion batteries. The data indicate the as-prepared material is capable of realizing the single electron redox capacity due to the reduction of Fe 3+ /Fe 2+ . All of the findings suggest a possible use of Cu 3 [Fe(CN) 6 ] 2 nanoparticles as environmental friendly and cost-effective cathode material, which also open new perspectives to develop cathode materials for sodium-ion batteries.
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