Application of acid-promoted UiO-66-NH2 MOFs in the treatment of wastewater containing methylene blue
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A series of Zr-based MOFs were successfully prepared by conventional solvothermal method and microwave irradiation method. The effects of synthesis methods and acid modifiers on the morphology and thermal stability of the materials were investigated. The samples were characterized by powder X-ray diffraction, scanning electron microscopy, thermogravimetric analysis, N2 adsorption–desorption, Fourier transform infrared, and diffuse reflectance spectra. The results showed that the products synthesized by microwave irradiation possessed a better dispersibility and a lager specific surface area than those synthesized by solvothermal method. As a potential adsorbent for wastewater treatment, the adsorption and removal of cationic dye methylene blue (MB) by the synthetic materials was studied. The addition of acid as a regulator could increase the specific surface area of the materials, thereby improving the adsorption efficiency of MB. After repeated adsorption and desorption, the adsorption capacity of the samples could be regenerated by photocatalytic degradation. The photodegradation and regeneration experiments showed that the samples had good stability and reusability. All these indicated that this type of materials had great potential in the field of wastewater treatment and resource utilization.
KeywordsSynthesis method Acid regulator Adsorption Resource utilization Regeneration and reusability
This project was granted financial support from the Henan Province program for science and technology development (16210221247) and the Program of Henan Province Department of Education (15A430053).
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