Hierarchical porous MXene/amino carbon nanotubes-based molecular imprinting sensor for highly sensitive and selective sensing of fisetin.
Ma, Xue; Tu, Xiaolong; Gao, Feng; Xie, Yu; Huang, Xigen; Fernandez, Carlos; Qu, Fengli; Liu, Guangbin; Lu, Limin; Yu, Yongfang
In this work, a highly selective and sensitive electrochemical sensor based on hierarchical porous MXene/amino carbon nanotubes (MXene/NH2-CNTs) composite and molecularly imprinted polymer (MIP) was developed for fisetin detection. The porous MXene/NH2-CNTs films were fabricated by self-assembly of negatively charged Ti3C2Tx MXene flakes and positively charged NH2-CNTs. The utilization of conductive NH2-CNTs as interlayer spacers efficiently inhibited the aggregation of MXene flakes and formed a well-defined porous structure, as a result of increasing the effective surface area, an enhancement of the electrical conductivity and electrocatalytic activity was observed. This sensor takes advantages of molecularly imprinted technique and MXene/NH2-CNTs nanomaterials to achieve high selectivity and high sensitivity for the determination of fisetin. The factors that affect sensor response were studied and optimized. The as-prepared molecular imprinting sensor, under the optimized conditions, presented a good linear relationship with the fisetin concentration ranging from 0.003 μmol L-1 to 20.0 μmol L-1 with a limit of detection (LOD) of 1.0 nmol L-1. Besides, with favorable stability and selectivity, this newly developed sensor was utilized for the detection of fisetin in actual samples with satisfactory results.
|Journal Article Type||Article|
|Journal||Sensors and actuators B: chemical|
|Peer Reviewed||Peer Reviewed|
|Institution Citation||MA, X., TU, X., GAO, F., XIE, Y., HUANG, X., FERNANDEZ, C., QU, F., LIU, G., LU, L. and YU, Y. . Hierarchical porous MXene/amino carbon nanotubes-based molecular imprinting sensor for highly sensitive and selective sensing of fisetin. Sensors and actuators B: chemical [online], In Press. Available from: https://doi.org/10.1016/j.snb.2020.127815|
|Keywords||Molecular imprinting sensor; Electrochemical detection; MXene; NH2-CNTs; Fisetin|
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