Removal of Malachite Green Dye from Water Using MXene (Ti3C2) Nanosheets

Abstract

In the present study, new emerging 2D Mxene nanosheets (MXNSs) were synthesized from MAX phase powders of Ti3AlC2 and then characterized using a scanning electron microscope (SEM) and X-ray diffraction (XRD) to explore the chemical and physical properties of the prepared MXNS. The characterization of the synthesized MXNS indicated the formation of exfoliated 2D MXene nanosheets (Ti3C2) as a result of the HF treatment of the MAX phase, which was confirmed by XRD measurements, as the characteristic peaks of 2D MXene nanosheets were only observed. The synthesized MXNS was then used as a solid adsorbent for removing malachite green dye (MG) from water. The effects of different operational factors such as MXNS dose, solution temperature, time, MG concentration, solution pH, and ionic strength have also been evaluated. The adsorption results showed that the temperature of the solution, as well as its pH, significantly influenced MG removal when using MXNS. The optimum removal was obtained within 150 min, with 20 mg of MXNS at ambient temperature and a pH value of 6.0. The maximum removal capacity obtained was 4.6 mg MG per g of MXNS using 5 mg of MXNS with a removal efficacy of 46.0%, and the minimum removal capacity obtained was 2.5 mg MG per g of MXNS using 20 mg of MXNS with a removal efficacy of 99.1%. Finally, the results displayed that the MXNS solid adsorbent was able to absorb a high percentage of MG and maintained reasonable efficiency for four consecutive cycles, indicating that MXNS could be a promising adsorbent in wastewater remediation and environmental sustainability.

2D VS2@MXene Based Zinc Ion Batteries with SPANI‐Contained Electrolyte Enables Dendrite‐Free Anode for Stable Cycling

“…[ 30 ] Moreover, in the VS 2 @MXene samples, the characteristic peaks corresponding to both VS 2 and MXene are observed, indicating the crystalline structures of VS 2 and MXene were nearly undisturbed each other during the compositing process. [ 31,32 ] However, for the (002) and (200) crystal face of MXene at 2θ = 9.9° and 2θ = 42.1°, the diffraction peaks of VS 2 @MXene shifted to 2θ = 9.7° and 2θ = 41.9°, respectively, corresponding to 0.16 nm of interlayered enlargement. Therefore, strong interactions happen between MXene and VS 2 during the hydrothermal reaction, and VS 2 may be intercalated between the MXene layers to form VS 2 @MXene.…”

Removal of Patent Blue Dye Using Ananas comosus-Derived Biochar: Equilibrium, Kinetics, and Phytotoxicity Studies

“…Germination = lentil seeds germinated/lentil seeds used for germination × 100. (12) Vigor index (VI) = length (Radicle + plumule) × germination (%).…”

“…Hence, the development of novel adsorption technologies in wastewater treatment for the removal of contaminants is required for the safe release of wastewater and its reutilization in the current scenario of surging industrial activities. Various methods have been proposed for dye elimination from contaminated water, such as sedimentation, flocculation, coagulation, ultrasound irradiation, mineralization, ion exchange, photocatalysis, reverse osmosis, ozonation, and microbial degradation [12,13]. Various sorbents such as zeolite, chitosan, activated carbon, and polymeric materials are also available commercially, which can remove contaminants from wastewater [14,15].…”