Co-deposition of catechol/polyethyleneimine on porous membranes for efficient decolorization of dye water. Issue 27 (22nd June 2015)

• Record Type: Journal Article
• Authors: Qiu, Wen-Ze; Yang, Hao-Cheng; Wan, Ling-Shu; Xu, Zhi-Kang
• Is Part Of: Journal of materials chemistry. Volume 3:Issue 27(2015)
• Page Start: 14438
• Page End: 14444
• Publication Date: 2015-06-22
• Subjects: Materials -- Research -- Periodicals; Chemistry, Analytic -- Periodicals; Environmental sciences -- Research -- Periodicals; 543.0284
• DOI: 10.1039/c5ta02590g
• Languages: English
• ISSNs: 2050-7488

Abstract

Abstract : Porous membranes via the co-deposition of catechol and polyethyleneimine were fabricated with excellent hydrophilicity and distinguished surface charges for decolorizing anionic dye solutions. Abstract : Mussel-inspired chemistry has been broadly exploited for multifunctional coatings in the surface modification of applied materials. Polyphenols are ubiquitous in plant tissues and far less expensive than polydopamine for mussel-inspired chemistry. Herein, we report a facile and effective method to modify porous membranes via the co-deposition of catechol (CCh) and polyethyleneimine (PEI). The membrane structures and properties were investigated by ATR/FTIR, XPS, FESEM, zeta potential, water contact angle and pure water flux measurements. The results reveal that the membranes deposited with a CCh–PEI mass ratio of 1 : 0.25 show excellent hydrophilicity, ultrahigh water permeation flux and distinguished surface charges. These membranes were used to decolorize anionic dye solutions during filtration with superior removal efficiencies of over 99%. Moreover, they have good reusability over repeated operations with a simple regeneration process.