  Adsorption is one important way applied to water decontamination, where
carbon is commonly used as highly effective absorbent. Carbon of different
morphologies and structures normally demonstrate distinct capabilities to
adsorption-typed decontaminations. Graphene oxide is regarded as the oxidative
derivative of graphene, maintaining its 2D morphology-featuring structure while
location-dependently immobilized with a large amount of various
oxygen-involving functional moieties on both sides. Free-standing graphene
oxide tends to fully unfold in water and behave in macromolecular-like Brownian
motion. Therefore, high-performance adsorption occurs during the process of
interacting with large amount of sorbates, during which an unevenness of
effective adsorptive site distribution turns out for targeted matter due to
functional group-to-sorbate interaction mechanism differentiation as well as
groups'inherent location specifications. Thus, oriented manipulation of
surficial functional moieties and their site distribution is potentially a way
to further enhance the adsorptive performances, and this could go even better
if considering combining adsorption and an in-situ manipulation at the same
time.
