Construction of a 3D Metal-Organic Framework and Its Composite for Water Remediation via Selective Adsorption and Photocatalytic Degradation of Hazardous Dye.

In this work, a new bimetallic Na(I)-Zn(II) metal-organic framework (MOF), formulated as [Na 2 Zn 3 (btc) 2 (μ-HCOO) 2 (μ-H 2 O) 8 ] n ( 1 ) (H 3 btc = benzene tricarboxylic acid), and its composite (ZnO@ 1 ) have been successfully synthesized using solvothermal and mechanochemical solid grinding methods. 1 and ZnO@ 1 were characterized by diffraction [single-crystal X-ray diffraction (XRD) and powder XRD], spectroscopic (ultraviolet-visible diffuse reflectance spectroscopy and Fourier transform infrared spectroscopy), microscopic (transmission electron microscopy), and thermal (thermogravimetric analysis) methods. The surface area and porosity of 1 were determined using a Brunauer-Emmett-Teller analyzer. Single-crystal diffraction of 1 confirms that Na1 and Zn2 have octahedral coordination environments, whereas Zn1 has a tetrahedral coordination geometry. Topological simplification of 1 shows a 3,6-connected kgd net. Na(I)-Zn(II) MOF ( 1 ) is crystallized with slight porosity and exhibits good tendency toward the encapsulation of zinc oxide nanoparticles (ZnO NPs). The photocatalytic behaviors of 1 and its composite (ZnO@ 1 ) were investigated over MB dye under sunlight illumination with promising degradation efficiencies of 93.69% for 1 and 97.53% for ZnO@ 1 in 80 min.