Journal
SMALL
Volume 9, Issue 2, Pages 273-283Publisher
WILEY-V C H VERLAG GMBH
DOI: 10.1002/smll.201201125
Keywords
first-principles calculations; graphene; pesticides; density functional theory
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Funding
- Nano Mission of Department of Science and Technology (DST), Government of India
- AOARD [FA2386-10-1-4062, FA2386-10-1-4150]
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Unprecedented adsorption of chlorpyrifos (CP), endosulfan (ES), and malathion (ML) onto graphene oxide (GO) and reduced graphene oxide (RGO) from water is reported. The observed adsorption capacities of CP, ES, and ML are as high as similar to 1200, 1100, and 800 mg g(-1), respectively. Adsorption is found to be insensitive to pH or background ions. The adsorbent is reusable and can be applied in the field with suitable modifications. A first-principles pseudopotential-based density functional analysis of graphenewaterpesticide interactions showed that the adsorption is mediated through water, while direct interactions between graphene and the pesticides is rather weak or unlikely.
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