Hybridization of Nanoclay with a Chromium-Based Metal-Organic Framework for Boosting Adsorption of Organic Dyes from Wastewater

We demonstrate enhanced dye adsorption capacity of nanoclay by decoration with chromium-based MOF (MIL-101) nanostructure. The Clay/Cr-MOF composite exhibits a crystalline structure with high thermal stability. Moreover, it shows the superior specific surface area (4959 m(2)/g) and porosity which is beneficial for wastewater treatment. The developed Clay-MOF composite exhibits superb adsorption capacity toward various organic dyes as compared with existing materials. The adsorption experiments revealed high adsorption capacity and selective dye removal efficiency of MOF-modified nanoclay with reusability for multiple regeneration cycles. The adsorption kinetics was found to obey the pseudo-second-order kinetic model. These findings provide new insights into the application of such porous adsorbents for wastewater treatment applications.

Automated summary

In this study, nanoclay was decorated with chromium-based MOF (MIL-101) nanostructures to enhance its dye adsorption capacity. The modified Clay/Cr-MOF composite showed a crystalline structure with high thermal stability, as well as a large specific surface area and porosity, which are beneficial for wastewater treatment. The adsorption experiments demonstrated that the MOF-modified nanoclay had excellent adsorption capacity and selective dye removal efficiency, with the ability to be regenerated for multiple cycles.