A portable sensor for glucose detection in Huangshui based on blossom-shaped bimetallic organic framework loaded with silver nanoparticles combined with machine learning

In this work, we propose a blossom-like Ni, Co bimetallic metal-organic framework (NiCo-MOF) synthesized hydrothermally and decorated with silver nanoparticles (AgNPs) via chemical reduction for electrochemical enzyme-free glucose sensing. The NiCo-MOF nanostructures had large specific surface area and good sensing performance. The AgNPs enhanced the electrochemical performance of the MOF, resulting in excellent electrochemical activity. The sensor exhibited sensitivities of 1191.84 and 271.19 μA mM-1 cm-2 in the linear ranges of 0.005-1.125 and 1.525-5.325 mM, respectively, with a detection limit of 2.3 μM. The sensor was successfully applied for glucose determination in Huangshui (HS) using an artificial neural network as machine learning (ML) model. The R2 value near 1, low RMSE, and high RPD values of the proposed ML model demonstrate its excellent fitting and prediction performance. This will provide a fast and portable intelligent sensing analysis technology for the detection of glucose in HS.

NiCo-MOF Nanospheres Created by the Ultra-Fast Microwave Method for Use in High-Performance Supercapacitors

Metal-organic frameworks-through the use of creative synthetic designs-could produce MOF materials with excellent porosity, stability, particle microstructures, and conductivity, and their inherent characteristics-including their porosity and controllable structure-may result in an immense number of prospects for energy storage. In this paper, a nanosphere-like NiCo-MOF was effectively manufactured via an ultra-fast microwave technique. Additionally, the ideal synthesis conditions of the NiCo-MOF were investigated by adjusting the microwave output power and microwave reaction time. Under the reaction conditions of a 600 W microwave and a 210 s microwave reaction time, the NiCo-MOF exhibited an excellent capacitance of 1348 F/g at a current density of 1 A/g and an 86.1% capacity retention rate at 10 A/g. In addition, self-assembled NiCo-MOF/AC asymmetric capacitors showed a splendid energy density of 46.6 Wh/kg and a power density of 8000 W/kg.

3D Porous Ti3C2 MXene/NiCo-MOF Composites for Enhanced Lithium Storage

To improve Li storage capacity and the structural stability of Ti₃C₂ MXene-based electrode materials for lithium-ion batteries (LIBs), a facile strategy is developed to construct three-dimensional (3D) hierarchical porous Ti₃C₂/bimetal-organic framework (NiCo-MOF) nanoarchitectures as anodes for high-performance LIBs. 2D Ti₃C₂ nanosheets are coupled with NiCo-MOF nanoflakes induced by hydrogen bonds to form 3D Ti₃C₂/NiCo-MOF composite films through vacuum-assisted filtration technology. The morphology and electrochemical properties of Ti₃C₂/NiCo-MOF are influenced by the mass ratio of MOF to Ti₃C₂. Owing to the interconnected porous structures with a high specific surface area, rapid charge transfer process, and Li⁺ diffusion rate, the Ti₃C₂/NiCo-MOF-0.4 electrode delivers a high reversible capacity of 402 mAh g⁻¹ at 0.1 A g⁻¹ after 300 cycles; excellent rate performance (256 mAh g⁻¹ at 1 A g⁻¹); and long-term stability with a capacity retention of 85.7% even after 400 cycles at a high current density, much higher than pristine Ti₃C₂ MXene. The results highlight that Ti₃C₂/NiCo-MOF have great potential in the development of high-performance energy storage devices.