| Literature DB >> 27702521 |
Long Chen1, Yanhui Li2, Qiuju Du1, Zonghua Wang1, Yanzhi Xia1, Emily Yedinak3, Jun Lou3, Lijie Ci4.
Abstract
A novel three-dimensional (3D) agar/graphene oxide (AGO) composite aerogel was prepared by a vacuum freeze drying method. The AGO aerogel was tested for its adsorption capacity of methylene blue (MB) and was found to have a maximum adsorption capacity of 578mg/g, as determined from the Langmuir isotherm. The adsorption kinetic studies revealed that adsorption followed pseudo-second-order model. The thermodynamic parameters calculated from the Van't Hoff equation indicate that the adsorption was an endothermic and spontaneous process. The adsorption mechanism may be attributed to electrostatic interaction between MB and AGO aerogel. Furthermore, the AGO aerogel can easily be recycled with a dilute NaOH solution wash, retaining over 91% of the adsorption capacity after recycling three times.Entities:
Keywords: Adsorption; Aerogel; Agar (PubChem CID: 76645041); Desorption; Graphene oxide; Graphite (PubChem CID: 5462310); Hydrochloric acid (PubChem CID: 313); Hydrogen bromide (PubChem CID: 784); Methylene blue; Methylene blue (PubChem CID: 6099); Nitric acid (PubChem CID: 944); Potassium permanganate (PubChem CID: 516875); Sodium hydroxide (PubChem CID: 14798); Sodium nitrate (PubChem CID: 24268); Sulphuric acid (PubChem CID: 1118)
Year: 2016 PMID： 27702521 DOI： 10.1016/j.carbpol.2016.08.047
Source DB: PubMed Journal: Carbohydr Polym ISSN： 0144-8617 Impact factor: 9.381