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Novel and Reusable Graphene Oxide-Coated Reticulated Open-Cell Mullite Foams for Methylene Blue Dye Adsorption
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Document Title
Novel and Reusable Graphene Oxide-Coated Reticulated Open-Cell Mullite Foams for Methylene Blue Dye Adsorption
Author
Singhapong W. Jaroenworaluck A. Manpetch P.
Affiliations
National Metal and Materials Technology Center (MTEC) National Science and Technology Development Agency (NSTDA) 111 Thailand Science Park Phahonyothin Road Pathum Thani Khlong Luang 12120 Thailand
Type
Article
Source Title
ACS Omega
ISSN
24701343
Year
2024
Volume
9
Issue
5
Page
5541-5547
Open Access
All Open Access Gold
Publisher
American Chemical Society
DOI
10.1021/acsomega.3c07569
Abstract
Reticulated open-cell mullite (ROM) foams coated with graphene oxide (GO) multilayers as novel and reusable composites (ROM/GO) were first fabricated and functionalized to remove methylene blue (MB) dye from aqueous solutions. In this study the ROM foams were produced via a replica technique utilizing rice husk as a starting raw material of silica (SiO2) mixed with commercially available alumina (Al2O3) in the step of slurry preparation. GO was synthesized by a modification of Hummer抯 method and dispersed in a fixed weight ratio in an aqueous solution. The HCl-pretreated ROM foams were dip-coated for up to 5 cycles using a fixed weight ratio of GO in an aqueous solution. The experimental results revealed that the ROM/GO foams provided 100% adsorption efficiency for MB within 30 min. The adsorption kinetics of the ROM/GO foams followed the first-order model. Based on the microstructural investigations on the surfaces of the ROM foams compared with the ROM/GO foams the adsorption performance was related to the unique porous structure of the ROM foams incorporating the physicochemical properties of the GO-multilayered coating. Finally the ROM/GO foams are considered as sustainable and cost-effective adsorbents due to their reusable functionality for at least 5 cycles of MB removal. ? 2024 The Authors. Published by American Chemical Society.
License
CC BY
Rights
Authors
Publication Source
WOS