Loading control of metal-organic frameworks in Fe3O4@MOFs series composite adsorbents for optimizing dyes adsorption

This study enhanced the dye adsorption capacity and efficiency over Fe3O4@MOFs series composite adsorbents through enhancing the loading of MOFs. A multiple loading method was developed for controlling the loading percentage of MOFs in Fe3O4@ MOFs series composite adsorbents, the values of which were calculated by the analysis of results of thermogravimetric analysis, X-ray diffraction, Fourier transform infrared spectroscopy, X-ray photoelectron spectroscopy, inductively coupled plasma mass spectrometry, Brunauer-Emmett-Teller, and vibrating sample magnetometry measurements. Dye adsorption test presented that an optimized adsorbent with enhanced adsorption capacity and adsorption efficiency could be achieved through enhancing the MOF loading in Fe3O4@MOFs series composite adsorbents.