Jump to main content
Jump to site search


Graphene/waste-newspaper cellulose composite aerogels with selective adsorption of organic dyes: preparation, characterization, and adsorption mechanism

Author affiliations

Abstract

Eco-friendly graphene oxide (GO)/waste-newspaper cellulose (WCE) and graphene nanosheet (GNS)/WCE composite aerogels were facilely synthesized via the sol–gel and freeze-drying processes. Morphological analysis and structural characterization revealed that the prepared composite aerogels possessed the perfect foam structure. Due to the different interactions between the aerogel and dyes, namely, electrostatic attraction, charge repulsion, and π–π interaction, the composite aerogels exhibited significantly discrepant adsorption capacities for two dyes, namely, methylene blue (MB, cationic) and Congo red (CR, anionic). With the addition of 0.5 w/v% GO, the MB adsorption capacity of WCE obviously improved by 235.6% from 65.4 to 154.1 μmol g−1, while the CR adsorption only increased by 70.2%. On the contrary, the CR adsorption of GNS/WCE was distinctly superior to that of MB. Furthermore, the entire adsorption process was suitable to be modeled by Langmuir isotherm, pseudo-second-order kinetics model, and intraparticle diffusion mechanism. These findings provide guidance for the development of green and efficient adsorbents for the removal of dyes from wastewater.

Graphical abstract: Graphene/waste-newspaper cellulose composite aerogels with selective adsorption of organic dyes: preparation, characterization, and adsorption mechanism

Back to tab navigation

Supplementary files

Article information


Submitted
25 Oct 2019
Accepted
04 Jan 2020
First published
07 Jan 2020

New J. Chem., 2020, Advance Article
Article type
Paper

Graphene/waste-newspaper cellulose composite aerogels with selective adsorption of organic dyes: preparation, characterization, and adsorption mechanism

C. Feng, P. Ren, Z. Li, W. Tan, H. Zhang, Y. Jin and F. Ren, New J. Chem., 2020, Advance Article , DOI: 10.1039/C9NJ05346H

Social activity

Search articles by author

Spotlight

Advertisements