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Stabilizing black phosphorus nanosheets via edge-selective bonding of sacrificial C60 molecules
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Journal Article
Stabilizing black phosphorus nanosheets via edge-selective bonding of sacrificial C60 molecules
2018
Overview
Few-layer black phosphorus (BP) with an anisotropic two-dimensional (2D)-layered structure shows potential applications in photoelectric conversion and photocatalysis, but is easily oxidized under ambient condition preferentially at its edge sites. Improving the ambient stability of BP nanosheets has been fulfilled by chemical functionalization, however this functionalization is typically non-selective. Here we show that edge-selective functionalization of BP nanosheets by covalently bonding stable C
60
molecules leads to its significant stability improvement. Owing to the high stability of the hydrophobic C
60
molecule, C
60
functions as a sacrificial shield and effectively protects BP nanosheets from oxidation under ambient condition. C
60
bonding leads to a rapid photoinduced electron transfer from BP to C
60
, affording enhanced photoelectrochemical and photocatalytic activities. The selective passivation of the reactive edge sites of BP nanosheets by sacrificial C
60
molecules paves the way toward ambient processing and applications of BP.
Few-layered black phosphorus has unique and appealing electronic properties but is easily oxidized in air. Here, the authors covalently functionalize black phosphorus nanosheets with C
60
at their edges, providing improved stability and enhanced photoelectrochemical and photocatalytic activities.
Publisher
Nature Publishing Group UK,Nature Publishing Group,Nature Portfolio
Subject
