Functional Protection of Exfoliated Black Phosphorus by Noncovalent Modification with Anthraquinone,ACS Nano

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Functional Protection of Exfoliated Black Phosphorus by Noncovalent Modification with Anthraquinone
ACS Nano ( IF 15.8 ) Pub Date : 2018-06-15 00:00:00 , DOI: 10.1021/acsnano.8b01474
Rui Gusmão ₁ , Zdeněk Sofer ₁ , Martin Pumera ₁

Affiliation

Few and monolayer black phosphorus (phosphorene) is currently an intensively researched material. Shear exfoliated black phosphorus (BP_SE) nanosheets were functionalized with the redox active antraquinone (AQ) that can provide additional charge storage capacity. The noncovalent interaction of BP with AQ occurs due to van der Waals interactions. X-ray photoelectron spectroscopy results show that AQ coverage of BP_SE nanosheets led to a stabilization against BP_SE degradation. Electrochemistry of the BP_SE-AQ shows that AQ is stably anchored onto BP_SE and exhibits redox peaks stable for more than 100 cycles. The surface coverage by AQ on BP_SE is estimated to be 1.25 nmol AQ/mg BP and electron-transfer rate constant (k_ET) of 33 s^–1. Furthermore, the proposed modification greatly increases the gravimetric capacitance of BP_SE-AQ with respect to the starting BP_bulk. Such coating of BP not only protects BP from degradation but also brings electroactive functionality to this two-dimensionally layered material.

中文翻译：

蒽醌非共价修饰对脱落黑磷的功能保护

目前很少有单层的黑磷（磷化氢）被广泛研究。剪切剥落的黑磷（BP _SE）纳米片被氧化还原活性蒽醌（AQ）官能化，可以提供额外的电荷存储能力。BP与AQ的非共价相互作用是由于范德华相互作用引起的。X射线光电子能谱结果表明BP _SE纳米片的AQ覆盖导致了BP _SE降解的稳定性。BP _SE -AQ的电化学表明，AQ稳定地锚定在BP _SE上，并显示稳定的氧化还原峰超过100个循环。AQ在BP _SE上的表面覆盖率估计为1.25 nmol AQ / mg BP，电子传递速率常数（k _ET）为33 s ^–1。此外，相对于起始BP_体积，所提出的修改极大地增加了BP _SE -AQ的重量电容。这种BP涂层不仅可以保护BP免受降解，还可以为二维层状材料带来电活性功能。

更新日期：2018-06-15

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