The investigation of the catalytic performance of rhodium nanoparticles supported on uio-66 metal-organic framework in the hydrolysis of DMNP

Organophosphorus (OP)-based chemical warfare agents (CSA), such as Soman (GD), are one of the most harmful classes of CSA, which can disrupt signal transmission in many systems in the body, from the nervous system to the muscles, resulting in death even when exposed to concentrations as low as 0.01 ppm. For this reason, there has been great interest in the development of advanced technology materials to be used in personal protective clothing or equipment to capture and/or degrade the lethal OP compound in the structure of these gases. When we look at materials that can easily adsorb and effectively degrade these harmful KSAs, we see that the first studies were carried out using oxides of transition metals such as zirconium oxides, hydroxides or titanium oxides. However, an important disadvantage of these materials is their low surface area, low porosity, and poisoning of the active sites after the adsorption of KSA, which causes the catalyst to show low efficiency. Therefore, the use of zirconium-based metal-organic lattice structures (Zr-MOFs), as a class of crystalline organic porous materials with the high surface area and pores they provide, adds originality to the study. The development of MOF catalysts for the degradation of KSAs or simulants is very important, at least for laboratory-scale research. In this context; In this study, the catalytic hydrolysis efficiency for the degradation of dimethyl 4-nitrophenyl phosphate (DMNP), which is the simulant of Soman (GD) chemical warfare gas, was investigated. Catalytic hydrolysis activity kinetics for the degradation of dimethyl 4-nitrophenyl phosphate (DMNP), a KSA (GD (Soman)) simulant, were monitored by monitoring the formation of p-nitrophenoxide via UV–vis spectroscopy (λmax = 407 nm). As a result of the study, it was seen that DMNP degraded with a more effective reaction at increasing temperature values, thanks to the Rh/UiO-66 catalyst. In addition, it was observed that when the amount of Rh/UiO-66 catalyst was increased, it degraded DMNP at higher rates and eliminated its toxic effect. Finally, due to the positive results obtained, it is thought that the Rh/UiO-66 MOF material used will provide an opportunity for integration into personal protective clothing or equipment (mask, clothing, etc.).