The use of large amounts of deleterious solvents in the synthesis of metal–organic frameworks (MOFs) is one of the important factors limiting their application in industry.

In this paper, graphite and Fe2O3 are introduced into MgH2 powder by the method of hydrogenation after magnetic grinding. Hydrogen storage materials which composite of MgH2–5 wt.% C and MgH2–5 wt.% C–5 wt.% Fe2O3 are successfully prepared. The physical structure of these materials was analyzed and characterized by XRD, SEM, etc. Furthermore, the influence of graphite and Fe2O3 on the hydrolysis of MgH2 was systematically investigated. The results show that MgH2–C–Fe2O3 composite powder has the fastest hydrogen release rate in municipal drinking water and the highest conversion rate. Graphite and Fe2O3 can effectively reduce the activation energy of the hydrolysis reaction of MgH2 and improve the hydrolysis kinetics of MgH2. The synergistic effect of the coaddition of graphite and Fe2O3 can significantly increase the hydrolysis conversion rate of MgH2 and improve the hydrolysis kinetics.

In this study, novel supramolecular ionogels with ultrahigh efficient gelation and robust mechanical properties were prepared by mixing 4′-para-phenylcarboxyl-2,2′:6′,2″-terpyridine (PPCT) and zinc ions (Zn2+) in ethylammonium nitrate (EAN). The microstructure of the ionogels was determined to be three-dimensional networks of fibrous aggregates. X-ray diffraction and Fourier-transform infrared spectroscopy measurements demonstrated that ionogel formation involve the following steps: the terpyridine rings of PPCT form an assembled unit via π–π interaction, the unit further aggregates to form fibers using Zn2+ via hydrogen bonding and Zn2+ coordination, and the fibers stretch and intertwine to form a cross-linked network to immobilize EAN by solvophobic interactions, electrostatic interactions, and van der Waals forces. Rheological results revealed that ionogels exhibited high mechanical strength with an elastic modulus and a yield stress of 50 000 and 900 Pa, respectively. The ionogels of PPCT and Zn2+ mixtures served as the precursors to produce zinc sulfide (ZnS) nanoparticles (NPs). The uniform 10 nm-sized ZnS exhibited higher surface area and higher peroxidase-like activity that can be used for sulfide ion (S2–) colorimetric sensing to detect S2– at a lower limit detection of 5.27 nmol·L–1. Furthermore, an innovative, green, and convenient approach has been developed to produce ZnS NPs, which are an environmentally friendly and sustainable candidate material in bioengineering technology, environmental protection, and food industries.

Trifluoromethane (CHF3) is a ubiquitous by-product of chlorodifluoromethane synthesis (CHClF2) and is regarded as one of the most potent greenhouse emissions. Despite the adverse effects on the environment, CHF3 is the general method of exhaust gas incineration and is used for other purposes, for example, as a coolant and in plasma etching. This project establishes a flexible and efficient two-stage vacuum pressure swing adsorption (VPSA) process to generate pure CHF3 and CHClF2 simultaneously, improving the product’s recovery rate. The first-stage VPSA unit loading activated carbon is developed to obtain CHF3 with the purity of 99%. CHClF2 of 99.5% purity is obtained from the second-stage VPSA unit with NaX zeolite. The process simulation predicts that the two-stage coupled VPSA separation system can obtain CHF3 and CHClF2 simultaneously. Under the best process parameters, the purity of CHF3, the recovery rate of CHF3, the purity of CHClF2, and the recovery rate of CHClF2 are 99, 77.71, 99.5, and 72.13%, respectively. In all, our research demonstrates that the two-stage VPSA system is a practicable and worthy prospect for research and development. In addition, it can recover and purify CHF3 and CHClF2 through an efficient and cost-effective method.

Metal‐organic frameworks with high surface areas are currently being widely used for in‐depth studies on hydrogen storage with the aim of discussing the difficulties created by environmental degradation caused by the burning of fossil fuels. Understanding the effect of varied metal ion doping on adsorption position and energy is crucial to understanding the adsorption process. The adsorption behavior of NU‐1501‐Al and NU‐1501‐Fe was investigated using a combination of Grand Canonical Monte Carlo and Density Functional Theory in this study. The calculations reveal that aluminum has a larger charge than iron and higher adsorption energy. As the loading increases, hydrogen is primarily adsorbed by metal atoms and the carbon atoms of the metal‐benzene ring are connected to metal‐oxygen atoms. The research hopes to provide molecular‐level insights into the adsorption behavior of porous materials doped with different metals, which could be used to screen materials that improve gas adsorption, separation, and other expansion characteristics.