Open AccessSustainable Synthesis of MOF-5@GO Nanocomposites for Efficient Removal of Rhodamine B from Water
Author(s) -
Gyanendra Kumar,
Dhanraj T. Masram
Publication year - 2021
Publication title -
acs omega
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.779
H-Index - 40
ISSN - 2470-1343
DOI - 10.1021/acsomega.1c00143
Subject(s) - rhodamine b , nanocomposite , adsorption , langmuir adsorption model , aqueous solution , oxide , chemical engineering , graphene , kinetics , chemistry , materials science , nuclear chemistry , nanotechnology , organic chemistry , photocatalysis , catalysis , physics , quantum mechanics , engineering
Herein, a metal-organic framework (MOF-5) is synthesized by a solvothermal process and graphene oxide (GO) is prepared from the improved Hummer's method. The synthesis of MOF-5@GO nanocomposites is one-pot process via a grinding method and employed for the removal of Rhodamine B (RhB) dye. The removal efficiency of RhB is found to be 60.64% (151.62 mg·g -1 ) at 500 ppm. About 98.88% of RhB is removed within 5 min of contact time and increased up to 99.68% up to 10 min. The removal rate of MOF-5@GO nanocomposites is much better than that of pristine MOF-5. Equilibrium adsorption capacity is determined by a series of different experimental conditions such as pH, time, and concentration of dye solution. Although the results also showed that dye removal on MOF-5@GO nanocomposites is well described by the Langmuir isotherm ( R 2 = 0.9703), the adsorption kinetics data reveals pseudo-second-order ( R 2 = 0.9908). The synthesized nanocomposite is efficient for removal of dye, cost-effective, and reusable. Additionally, stability and self-degradation studies of pure RhB are reported in aqueous solution for up to 120 days at different pH values (pH 1-12).