材料科学
黑磷
双酚A
纳米复合材料
石墨烯
纳米材料
表面改性
化学工程
纳米技术
共价键
化学
有机化学
环氧树脂
复合材料
光电子学
工程类
作者
Jian Shen,Lingbo Liu,Kangbing Wu,Nianjun Yang
标识
DOI:10.1016/j.snb.2022.131623
摘要
The synthesis processes of black phosphorus (BP) nanosheets are generally complicated and expensive. More seriously, these BP nanosheets suffer from poor stability at ambient conditions as well as low conductivities, hindering their photoelectrochemical (PEC) sensing applications. In this work, a facile and cost-effective solvothermal method is developed for the in-situ growth of BP nanosheets on the surface of graphene (Gr) nanosheets (Gr@BP), where a cheap, stable and industry-available red phosphorus is used as the precursor. Characterization results of different Gr@BP nanocomposites reveal the formation of C-P and C-O-P covalent bonds between the BP nanosheets and Gr nanosheets, resulting in significantly improved stability, electrical conductivity and PEC properties of the BP nanosheets. After functionalization of an amino-rich Gr@BP nanocomposite with aminated bisphenol A (BPA) aptamer with aid of glutaraldehyde as the cross-linker, a sensitive, selective and stable PEC aptasensor that is driven by visible light is assembled toward the monitoring of a typical environmental pollutant - BPA. This work provides a facile and cheap strategy to synthesize and explore novel PEC applications of different and stable BP nanomaterials. • Stable BP nanosheets were in-situ grown on the Gr surface using solvothermal method. • The stability and PEC properties of BP nanosheets were significantly improved. • Construction of a stable and sensitivity PEC aptasensor for BPA.
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