The designed synthesis of a hydrophobic covalent polymer composite to expel toxic dyes and oil from wastewater: theoretical corroboration. (4th March 2021)

• Record Type: Journal Article
• Authors: Dey, Debanjan; Mondal, Amita; Nag, Somrita; Mondal, Udayan; Hirani, Harish; Banerjee, Priyabrata
• Is Part Of: New journal of chemistry. Volume 45:Number 11(2021)
• Page Start: 5165
• Page End: 5175
• Publication Date: 2021-03-04
• Subjects: Chemistry -- Periodicals; Chimie -- Périodiques; 540
• DOI: 10.1039/d0nj04949b
• Languages: English
• ISSNs: 1144-0546

Abstract

Abstract : In pursuit of addressing a global issue linked to the purification of contaminated water bodies, hydrophobic covalent organic framework (CPCMERI-2020 ) and its post-synthetically modified composites CPWCS and MS@CPWCS are reported herein. Abstract : In pursuit of addressing a global issue linked to the purification of contaminated water bodies, a hitherto less-explored hydrophobic melamine–terephthalaldehyde cross-linked covalent organic framework (COF) (named CPCMERI-2020 ) and its post-synthetically modified composites CPWCS (a composite of waste carbon soot particles (WCS) and CPCMERI-2020 ) and MS@CPWCS (CPWCS -coated melamine sponge (MS)) are reported herein. MS@CPWCS showed exceptional superhydrophobicity with a water contact angle of about 155.4 ± 0.3° owing to: (a) π–π stacking between the covalent framework and carbon soot; and (b) the presence of a high number of conjugated electron-rich organic entities. The hydrophobicity, together with the oleophilicity, made this composite, MS@CPWCS, an excellent contender to separate several toxic organic solvents and petroleum oil elements at an absorption capacity of 70-150 mg g −1 from adulterated water bodies. In addition to this, CPCMERI-2020 shows excellent absorptivity towards three cationic dyes: rhodamine-B (450 mg g −1 ), malachite green (350 mg g −1 ), and methylene blue (255 mg g −1 ), which makes this work unprecedented; furthermore, this work explores a new avenue of research in the multifaceted-materials-based field of water purification.