Poly(sodium styrene sulfonate) functionalized graphene as a highly efficient adsorbent for cationic dye removal with a green regeneration strategy. (May 2021)

• Record Type: Journal Article
• Authors: Hong, Mengru; Wang, Yake; Wang, Rong; Sun, Yuanqiang; Yang, Ran; Qu, Lingbo; Li, Zhaohui
• Is Part Of: Journal of physics and chemistry of solids. Volume 152(2021)
• Publication Date: 2021-05
• Subjects: Graphene -- Poly(sodium styrene sulfonate) -- Adsorption -- Cationic dyes; Solids -- Periodicals; Solides -- Périodiques; Solids; Periodicals; 530.41
• DOI: 10.1016/j.jpcs.2021.109973
• Languages: English
• ISSNs: 0022-3697

Abstract

Abstract: In this work, a simple and highly efficient adsorbent for cationic dyes based on poly(sodium styrene sulfonate) functionalized graphene (PSS-rGO) was reported. PSS-rGO showed an extraordinary adsorption capacity for methylene blue (MB) with a broadened pH range, from 1085 mg g −1 at pH 3.0–1300 mg g −1 at pH 11.0. Remarkably, the PSS-rGO adsorbent could be easily recovered and regenerated after dye adsorption by simply heating at 200 °C for 20 min and intermittent further PSS modification by ultra-sonication for 10 min, offering a facile recovery/regeneration strategy with no secondary pollution. The experimental results of adsorption kinetics and isotherms indicate a multilayer and heterogeneous adsorption process with possibly multiple interaction mechanism. A simple survival experiment of guppy fish (Poecilia reticulata) confirmed a good bio-compatibility of PSS-rGO. These results promise the potential of PSS-rGO for efficient removal of cationic dye with zero secondary pollution. Graphical abstract: Image 1 Highlights: A novel graphene based absdorbents: poly(sodium styrene sulfonate) functionalized graphene (PSS-rGO) was developed. A facile recovery/regeneration strategy with no secondary pollution by simple heating and ultrasonication was developed. The contradictory for the difference of the adsorption capacities of GO and rGO was explored. The obtained results promise the potential of PSS-rGO for efficient removal of cationic dyes and supplied helpful reference for design excellent graphene absorbents.