Stabilizing black phosphorus nanosheets via edge-selective bonding of sacrificial C60 molecules

Xianjun Zhu, Taiming Zhang, Daochuan Jiang, Hengli Duan, Zijun Sun, Mengmeng Zhang, Hongchang Jin, Runnan Guan, Yajuan Liu, Muqing Chen, Hengxing Ji, Pingwu Du, Wensheng Yan, Shiqiang Wei, Yalin Lu and Shangfeng Yang ()
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Xianjun Zhu: University of Science and Technology of China
Taiming Zhang: University of Science and Technology of China
Daochuan Jiang: University of Science and Technology of China
Hengli Duan: University of Science and Technology of China
Zijun Sun: University of Science and Technology of China
Mengmeng Zhang: University of Science and Technology of China
Hongchang Jin: University of Science and Technology of China
Runnan Guan: University of Science and Technology of China
Yajuan Liu: University of Science and Technology of China
Muqing Chen: University of Science and Technology of China
Hengxing Ji: University of Science and Technology of China
Pingwu Du: University of Science and Technology of China
Wensheng Yan: University of Science and Technology of China
Shiqiang Wei: University of Science and Technology of China
Yalin Lu: University of Science and Technology of China
Shangfeng Yang: University of Science and Technology of China

Nature Communications, 2018, vol. 9, issue 1, 1-9

Abstract: Abstract 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 C60 molecules leads to its significant stability improvement. Owing to the high stability of the hydrophobic C60 molecule, C60 functions as a sacrificial shield and effectively protects BP nanosheets from oxidation under ambient condition. C60 bonding leads to a rapid photoinduced electron transfer from BP to C60, affording enhanced photoelectrochemical and photocatalytic activities. The selective passivation of the reactive edge sites of BP nanosheets by sacrificial C60 molecules paves the way toward ambient processing and applications of BP.

Date: 2018
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DOI: 10.1038/s41467-018-06437-1

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