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Highly Efficient Method for Preparing Homogeneous and Stable Colloids Containing Graphene Oxide

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ABSTRACT

Phase transfer method has been developed for preparing homogeneous and stable graphene oxide colloids. Graphene oxide nanosheets (GONs) were successfully transferred from water to n-octane after modification by oleylamine. Corrugation and scrolling exist dominantly in the modified GONs. GONs were single layered with the maximum solubility in n-octane up to 3.82 mg mL-1. Oleylamine molecules chemically attach onto the GONs. Compared with traditional strategies, the phase transfer method has the features of simplicity and high efficiency.

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Schematic illustration of the phase transfer process.
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C2: Schematic illustration of the phase transfer process.

Mentions: Oleylamine is a typical surface modification agent, and it is often used to prepare enhanced hydrophobic nanomaterials [23]. Graphene oxide with rich oxygen-containing groups is expected to be surface-modified by oleylamine easily, and the experimental results validate the idea. The synthesis process of suspensions containing GONs in organic solvents was presented in Scheme 1. At first, the aqueous solution containing GONs was prepared, and then the GONs modified by oleylamine (GONs-OA) in water would be transferred to the organic phase n-octane. The phase transfer process of preparing organosol was simple. The GONs modified by oleylamine could be transferred from aqueous solution to organic solvent easily with high efficiency. Almost all the GONs could be transferred to octane (Scheme 2). The prepared colloids were homogeneous, and they remained stable for more than 6 months without any sediment.


Highly Efficient Method for Preparing Homogeneous and Stable Colloids Containing Graphene Oxide
Schematic illustration of the phase transfer process.
© Copyright Policy - open-access
Related In: Results  -  Collection

License
Show All Figures
getmorefigures.php?uid=PMC3211982&req=5

C2: Schematic illustration of the phase transfer process.
Mentions: Oleylamine is a typical surface modification agent, and it is often used to prepare enhanced hydrophobic nanomaterials [23]. Graphene oxide with rich oxygen-containing groups is expected to be surface-modified by oleylamine easily, and the experimental results validate the idea. The synthesis process of suspensions containing GONs in organic solvents was presented in Scheme 1. At first, the aqueous solution containing GONs was prepared, and then the GONs modified by oleylamine (GONs-OA) in water would be transferred to the organic phase n-octane. The phase transfer process of preparing organosol was simple. The GONs modified by oleylamine could be transferred from aqueous solution to organic solvent easily with high efficiency. Almost all the GONs could be transferred to octane (Scheme 2). The prepared colloids were homogeneous, and they remained stable for more than 6 months without any sediment.

View Article: PubMed Central - HTML - PubMed

ABSTRACT

Phase transfer method has been developed for preparing homogeneous and stable graphene oxide colloids. Graphene oxide nanosheets (GONs) were successfully transferred from water to n-octane after modification by oleylamine. Corrugation and scrolling exist dominantly in the modified GONs. GONs were single layered with the maximum solubility in n-octane up to 3.82 mg mL-1. Oleylamine molecules chemically attach onto the GONs. Compared with traditional strategies, the phase transfer method has the features of simplicity and high efficiency.

No MeSH data available.