Zr/Fe-MOFs and Zr/Fe-MOFs/GO composites were prepared by solvothermal methods. They were characterized by SEM, FTIR, TGA and used for efficient removal of organic contaminants from aqueous solutions.

In this study, we prepared Zn-MOFs as an ordinary, low-cost, and efficiency method taking advantage of zinc(ii) acetate monohydrate and 1,3,5-benzenetricarboxylic acid in microwave-assisted ball milling. The Zn-MOFs were measured via scanning electron microscopy, infrared spectrometry, X-ray diffraction, and thermogravimetry. We explored its use as a photocatalyst for the degradation of tetracycline hydrochloride and Congo red from aqueous solutions. The results demonstrate that the kinetic model was appropriate for the removal of organic pollutants. In general, it is feasible, inexpensive, and effective to use metal organic framework (MOF) to treat waste liquid. Therefore, our findings indicate that Zn-MOFs have broad application vista in wastewater purification.

Graphene oxide/metal-organic frameworks (GO/MOFs) have been prepared via solvothermal synthesis with ferrous sulfate heptahydrate, zirconium acetate and terephthalic acid for the purpose of removing organic pollutants from wastewater. The composites were analyzed using scanning electron microscopy, infrared spectrometry, and XRD. Tetracycline hydrochloride and orange II were implemented as model pollutants to evaluate the efficacy of the GO/MOFs in water purification, in which 50 mg of Zr/Fe-MOFs/GO was mixed with 100 mL of 10 mg/L, 20 mg/L, 30 mg/L, or 50 mg/L tetracycline hydrochloride solution and 25 mg/L, 35 mg/L, 45 mg/L, or 60 mg/L orange II solution, respectively. The removal efficacy after 4 hours was determined to be 96.1%, 75.8%, 55.4%, and 30.1%, and 98.8%, 91.9%, 71.1%, and 66.2%, respectively. The kinetics of pollutant removal was investigated for both tetracycline hydrochloride and orange II and excellent correlation coefficients of greater than 0.99 were obtained. The high efficacy of these MOFs in pollutant removal, coupled with their inexpensive preparation indicates the feasibility of their implementation in strategies for treating waste liquid. As such, it is anticipated that Zr/Fe-MOFs/GO composites will be widely applied in wastewater purification.

In‐based metal‐organic frameworks (In–MOFs) and graphene oxide (GO)/ In–MOFs composite materials were obtained by trimesic acid (or 2‐aminoterephthalic acid), GO, and Indium chloride tetrahydrate milled microwave‐assisted ball milling. Scanning electron microscopy (SEM), thermogravimetric analysis (TGA), and X‐ray diffraction (XRD) were applied to characterize the structure and thermostability of the synthesized composite materials. In addition, In–MOFs and GO/ In–MOFs were used for removal of organic dyes in water solutions. The adsorption and removal of Congo red (CR) in aqueous solution were studied. The adsorption capacity and behavior of GO/ In–MOFs towards CR were verified By studying the adsorption kinetics. The results showed that 55 mg/L of CR in a 200 mL solution was removed 90.83%, 90.40% and 96.27%, 95.02% by In–MOFs‐1, In–MOFs‐2, GO/In–MOFs‐1 and GO/In–MOFs‐2 within 240 min of treatment with natural light.

Fe-MOFs were prepared using a solvothermal method, and were characterized by scanning electron microscopy. We explored the application of Fe-MOFs as an adsorbing material for the removal of Rhodamine B (RhB) from aqueous solutions. The experimental data were simulated by dynamics and the results showed that the pseudo–second-order kinetics model was appropriate for analysis of RhB removal. We studied the adsorption capacity of MOF materials under different masses, concentrations, and pH conditions. When the pH was 6, the maximum adsorption capacity within 4 h was 135 mg/g. In summation, the removal of RhB from wastewater using MOFs is feasible, inexpensive, and effective. Hence, our findings indicate that MOFs have a broad application in the purification of wastewater.