Metal–organic frameworks (MOFs) are superior sorbents for water adsorption‐based applications. The unique step‐like water isotherm at a MOF‐specific relative pressure allows easy loading and regeneration over a small range of temperature and pressure conditions. With good hydrothermal stability and cyclic durability, it stands out over classical sorbents used in applications for humidity control, water harvesting, and adsorption‐based heating and cooling. These are easily regenerated at moderate temperatures using “waste” heat or solar heating. The isotherm thermodynamics and adsorption mechanisms are described, and the presence of MOFs in the water–air system is explained. Based on six selection criteria ≈40 reported MOFs and one COF are identified for potential application. Trends and approaches in further synthesis optimization and production scale‐up are highlighted. No‐MOF‐fits‐all, each MOF has its own specific step location matching only with a certain application type. Most applications are technically feasible and demonstrated on the bench‐scale or small pilot. Their maturity is benchmarked by their technology readiness level. Retrofitting existing applications with MOFs replacing classical desiccants may lead to rapid demonstration. Studies on techno‐economic analysis and life cycle analysis are required for a rational evaluation of the feasibility of promising applications.

No abstract

A honeycomb-shaped LaMnO 3 supercapacitor material has been successfully fabricated by a sol−gel method utilizing an as-prepared carbon sphere material as a template to control the morphology. The as-prepared materials were characterized by Xray diffraction (XRD), scanning electron microscopy (SEM), transmission electron microscopy (TEM), and the N 2 adsorption− desorption isotherm method. Electrochemical tests including cyclic voltammetry (CV), galvanostatic charge and discharge (GCD) measurements, electrochemical impedance spectroscopy (EIS), and cycle life were also carried out to investigate the supercapacitor performance of the as-prepared materials. The experimental results reveal that when the calcination temperature of the dry gel is 600 °C, the performance of the honeycomb LaMnO 3 perovskites is better, and the specific capacitance (535 F g −1 ) of the honeycomb LaMnO 3 perovskites is higher than that of LaMnO 3 perovskites prepared by the sol−gel method without adding the carbon sphere as the template (247 F g −1 ). Therefore, as far as supercapacitor materials are concerned, the preparation method of honeycomb LaMnO 3 perovskites displays better application prospects.

No abstract

No abstract