Tailoring of 2D MoS2 microspheres on 3D low-cost DE for the efficient removal of hazardous cationic dyes

• Published in: Advanced powder technology : the international journal of the Society of Powder Technology, Japan Japan, 2022-11, Vol.33 (11), p.103800, Article 103800
• Main Authors: Uthappa, U.T., Bhat, Shrinath, Soo Han, Sung, Jeong, Heon-Ho, Altalhi, Tariq, Jung, Ho-Young, Kurkuri, Mahaveer D.
• Format: Article
• Language: English
• Subjects: Adsorbents; Cationic dyes; Environmental applications; Low-cost; Membrane filter; Rapid adsorptions
• ISSN: 0921-8831; 1568-5527
• DOI: 10.1016/j.apt.2022.103800

[Display omitted] •2D MoS2 −3D DE hybrid materials were synthesized by a facile hydrothermal route.•Efficient 99.9% removal of MG dye from aqueous solutions.•The maximum adsorption capacity of 110 mg/g for MG dye.•MB dye removed using vacuum assisted membrane-based filter & showed 100% rejections.•The hybrid materials substantiated with better recyclability performances. The primary challenge involved in the water treatment field is to treat/clean the contaminated waste dye solutions before it releases into the environment. Industrial contaminant such as dyes are released into water streams, rendering the water unfit for further use. Treatment of such dye contaminants is still a challenging tasks that has evolved as one of the leading issues in environmental remediation. Some of the significant limitations in dye adsorption include time-consuming, synthetic routes, expensive adsorbents, more contact time, less adsorption performances and use of more adsorbents. To address such problems, herein in this work, 2D MoS2 molybdenum disulfide)-3D DE (diatomaceous earth) hybrid materials were synthesized by a facile and efficient hydrothermal route. The prepared innovative combination of 2D & 3D porous hybrid materials demonstrated to be efficient adsorbents for the efficient removal of malachite green (MG) dye from aqueous solution with superior 97 % removal efficiency within 5 mins and with an extended 60 mins of contact time possible to achieve 99.9 % of removal efficiency. Furthermore, the maximum adsorption capacity for DE was only 0.78 mg/g and developed 2D MoS2-3D DE exhibited an outstanding 110 mg/g for MB dye which is a significant improvement when compared to pristine DE. On the other hand, the 2D MoS2-3D DE was explored as a membrane-based filter for the removal of other important cationic pollutant methylene blue (MB) dye which showed 100 % rejection for varied MB volumes from 50 to 200 mL with average flux rate of 2200 L.m−2.h−1. Additionally, the 2D-3D hybrid adsorbents substantiated with better recyclability with up to 5 cycle performances which could be an excellent candidate for the removal of industrially important cationic dyes in the future.