Atom-level interaction design between amines and support for achieving efficient and stable CO2 capture.

Amine-functionalized adsorbents offer substantial potential for CO2 capture owing to their selectivity and diverse application scenarios. However, their effectiveness is hindered by low efficiency and unstable cyclic performance. Here we introduce an amine-support system designed to achieve efficient and stable CO2 capture. Through atom-level design, each polyethyleneimine (PEI) molecule is precisely impregnated into the cage-like pore of MIL-101(Cr), forming stable composites via strong coordination with unsaturated Cr acid sites within the crystal lattice. The resulting adsorbent demonstrates a low regeneration energy (39.6 kJ/molCO2), excellent cyclic stability (0.18% decay per cycle under dry CO2 regeneration), high CO2 adsorption capacity (4.0 mmol/g), and rapid adsorption kinetics (15 min for saturation at 30 °C). These properties stem from the unique electron-level interaction between the amine and the support, effectively preventing carbamate products' dehydration. This work presents a feasible and promising cost-effective and sustainable CO2 capture strategy.

Design of a Scalable Dendritic Copper@Ni2+, Zn2+ Cation-Substituted Cobalt Carbonate Hydroxide Electrode for Efficient Energy Storage.

Design and fabrication of novel electrode materials with excellent specific capacitance and cycle stability are urgent for advanced energy storage devices, and the combinability of multiple modification methods is still insufficient. Herein, Ni2+, Zn2+ double-cation-substitution Co carbonate hydroxide (NiZnCo-CH) nanosheets arrays were established on 3D copper with controllable morphology (3DCu@NiZnCo-CH). The self-standing scalable dendritic copper offers a large surface area and promotes fast electron transport. The 3DCu@NiZnCo-CH electrode shows a markedly improved electrochemical performance with a high specific capacity of ∼1008 C g-1 at 1 A g-1 (3.2, 2.83, and 1.26 times larger than Co-CH, ZnCo-CH, and NiCo-CH, respectively) and outstanding rate capability (828.8 C g-1 at 20 A g-1) due to its compositional and structural advantages. Density functional theory (DFT) calculation results illustrate that cation doping adjusts the adsorption process and optimizes the charge transfer kinetics. Moreover, an aqueous hybrid supercapacitor based on 3DCu@NiZnCo-CH and rGO demonstrates a high energy density of 42.29 Wh kg-1 at a power density of 376.37 W kg-1, along with superior cycling performance (retained 86.7% of the initial specific capacitance after 10,000 cycles). Impressively, these optimized 3DCu@NiZnCo-CH//rGO devices with ionic liquid can be operated stably in a large potential range of 4 V with greatly enhanced energy density and power capability (110.12 Wh kg-1 at a power density of 71.69 W kg-1). These findings may shed some light on the rational design of transition-metal compounds with tunable architectures by multiple modification methods for efficient energy storage.

Luteolin alleviates ochratoxin A induced oxidative stress by regulating Nrf2 and HIF-1α pathways in NRK-52E rat kidney cells.

Ochratoxin A (OTA) is a ubiquitous food contaminant and a critical food safety concern due to its nephron toxic effects, which impacts all parts of the world. Luteolin (LUT) had gained increasing interest as a health-promoting food antioxidant component. However, the preventative effect of LUT against OTA induced oxidative stress was not yet clear and the elucidation of which would provide critical information to develop dietary LUT as a control strategy for OTA. In the current study, the cytoprotective effect of LUT against OTA induced oxidative stress and the mechanism(s) behind was examined in NRK-52E rat kidney cells. The results showed that LUT exerted its preventative effect via restoring cell viability and preventing LDH release. It alleviated the OTA-induced oxidative stress and lipid peroxidation by reducing ROS accumulation, ameliorating the mitochondrial membrane potential reduction and reversing the activities of antioxidant enzymes to the control levels. The regulating roles of Nrf2 and HIF-1α in this process were evaluated by cell immunofluorescence assay, reporter plasmids transfection assay and qRT-PCR analysis. The results showed that LUT activated Nrf2 pathway and increased the antioxidant defense capacities of OTA treated cells. Additionally, LUT also modulated HIF-1α pathway to initiate the angiogenesis and epithelial restitution process.