Graphene oxide caged in cellulose microbeads for removal of malachite green dye from aqueous solution

• Published in: Journal of colloid and interface science 2015-01, Vol.437, p.277-282
• Main Authors: Zhang, Xiaomei, Yu, Hongwen, Yang, Hongjun, Wan, Yuchun, Hu, Hong, Zhai, Zhuang, Qin, Jieming
• Format: Article
• Language: English
• Subjects: Adsorption; Beads; Cellulose; Dyes; Filtration; Graphene; Graphene oxide; Malachite green; Oxides; Sol gel process
• ISSN: 0021-9797; 1095-7103
• DOI: 10.1016/j.jcis.2014.09.048

[Display omitted] •Graphene oxide/cellulose beads (GOCB) are prepared by a simple sol–gel method.•GOCB is a facile, effective and economic adsorbent for removal of malachite green.•GOCB shows good performance at ambient temperature and neutral aqueous.•The new adsorbent of GOCB can be separated and reused from aqueous solution by filtration.•GOCB has extensive applicability in the removal of dye from wastewater. A simple sol–gel method using non-toxic and cost-effective precursors has been developed to prepare graphene oxide (GO)/cellulose bead (GOCB) composites for removal of dye pollutants. Taking advantage of the combined benefits of GO and cellulose, the prepared GOCB composites exhibit excellent removal efficiency towards malachite green (>96%) and can be reused for over 5 times through simple filtration method. The high-decontamination performance of the GOCB system is strongly dependent on encapsulation amount of GO, temperature and pH value. In addition, the adsorption behavior of this new adsorbent fits well with the Langmuir isotherm and pseudo-second-order kinetic model.