Multilayer Graphene Oxide Supported ZIF-8 for Efficient Removal of Copper Ions

Abstract

To address the performance deterioration of ZIF-8 for the adsorption of copper ions caused by powder volume pressure and particle aggregation, we employed multilayer graphene oxide (MGO) as a support to prepare composite adsorbents (MGO@ZIF-8) by using the in situ growth of ZIF-8 on MGO. Due to a good interfacial compatibility and affinity between ZIF-8 and graphene nanosheets, the MGO@ZIF-8 was successfully prepared. The optimal Cu2+ adsorption conditions of MGO@ZIF-8 were obtained through single factor experiments and orthogonal experiments. Surprisingly, the Cu2+ adsorption capacity was significantly improved by the integration of MGO and ZIF-8, and the maximum Cu2+ adsorption capacity of MGO@ZIF-8 reached 431.63 mg/g under the optimal adsorption conditions. Furthermore, the kinetic fitting and isotherm curve fitting confirmed that the adsorption law of Cu2+ by MGO@ZIF-8 was the pseudo-second-order kinetic model and the Langmuir isotherm model, which indicated that the process of Cu2+ adsorption was monolayer chemisorption. This work provides a new approach for designing and constructing ZIF-8 composites, and also offers an efficient means for the removal of heavy metals.

rGO/ZIF-8 Aerogel for Effective Removal of Malachite Green from Wastewater

“…The absorption peaks at 1429, 1147, and 997 cm –1 are associated with the stretching of the C–N bond. The characteristic peaks at 756 and 424 cm –1 are attributed to the out-of-plane bending vibration of the CN ring and the stretching of Zn–N bonds, , respectively, indicating successful composite formation between the ZIF-8 crystals and DGA.…”

Recent Progress on the Adsorption of Heavy Metal Ions Pb(II) and Cu(II) from Wastewater

“…Lead (Pb) is a highly toxic heavy metal, and it has become a significant health risk for humans and animals. Pb(II) may exist in the forms of Pb 2+ and PbOH + in water at acid and neutral conditions, Pb 2 OH 3+ and Pb(OH) 4 2at higher pH conditions, or organic complexes with various organic compounds. Pb(II) enters the human body and circulates mainly in the form of a glycerophosphate protein complex and lead ion.…”

“…The wastewater from industrial production is the main source of heavy metal ions. During the past half-century, people realized that the accumulation of PPb levels of heavy metal ions can cause serious diseases in the human body and the amount of heavy metal is gradually enriched in the biological body along the food chain with irrigation, drinking water and other ways [ 4 , 5 , 6 ].…”

Zinc Imidazole Framework‐8 Nanoparticles Disperse MRSA Biofilm by Inhibiting Arginine Biosynthesis and Down‐Regulating Adhesion‐Related Proteins

“…It has been discovered that ZIF-8 NPs has many application, such as antibacterial agent, nano-drug delivery system, [29,30] electrochemical sensor, [31] and adsorption agent. [32] In previous studies, we have successfully synthesized ZIF-8 NPs and demonstrated that it has antibacterial effect as well as can promote the healing of infected wounds, and we analyzed its mechanism utilizing transcriptomics and metabolomics. [33] Several studies have proved that some nanoparticles, including MOFs, are promising of inhibiting biofilm formation or dispersing established biofilm.…”