| Article ID | Journal | Published Year | Pages | File Type |
|---|---|---|---|---|
| 592192 | Colloids and Surfaces A: Physicochemical and Engineering Aspects | 2015 | 7 Pages |
•Tannic acid functionalized graphene (TA-G) was synthesized.•TA-G exhibited fine adsorption performance for RB.•Theoretical maximum adsorption capacity of RB on TA-G achieved 201 mg g−1.
A facile and green method was employed to synthesize the tannic acid functionalized graphene nanocomposite (TA-G) using tannic acid as reducing as well as capping reagent which could alter graphene surface physicochemical properties to improve the adsorption efficiency. Then the as-prepared TA-G was used as adsorbent to investigate the adsorption behavior for rhodamine B (RB). Due to the intensive π–π stacking interaction and electrostatic attraction, TA-G exhibited fine adsorption performance for RB. The adsorption isotherm fitted Langmuir model well and the theoretical maximum of adsorption capacity calculated by Langmuir model was 201 mg g−1 which was approximately in a close agreement with the experimental measured data. The kinetics of adsorption was consistent with the pseudo-second-order model perfectly and chemisorption was the speed limit step. Therefore, the as-prepared TA-G nanocomposite would be an ideal adsorbent for the removal of RB in aqueous solution and opened a new door to broaden the potential applications of graphene in environmental research.
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