使用 Fe 掺杂的 MoS2 纳米片构建的用于生物传感应用的分级微管,Dalton Transactions

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使用 Fe 掺杂的 MoS2 纳米片构建的用于生物传感应用的分级微管
Dalton Transactions ( IF 3.5 ) Pub Date : 2022-09-11 , DOI: 10.1039/d2dt02309a
Zhiwen Shen ₁ , Suping Han ₂ , Jingli Xu ₁ , Xue-Bo Yin ₁ , Min Zhang ₁

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多种功能组分的结构设计可以增强MoS ₂基复合材料在类酶催化中的协同催化性能。在此，设计了一维（1D）Fe-MoS ₂微管来制备管状Fe掺杂的MoS ₂复合材料，其中MoO ₃微棒作为自我牺牲前体。值得注意的是，结果表明，硫化过程中释放的氨导致MoO ₃核溶解并形成管状结构。Fe-MoS ₂复合材料整合了 Fe 掺杂 MoS _{2的协同效应}纳米片（NS）和一维管状结构。因此，在类过氧化物酶催化中观察到比在其他组分（例如 MoO ₃ @FeOOH、FeOOH 和 MoS ₂ NSs）中更高的催化活性。过氧化物酶样机制起源于˙OH自由基的产生。Fe-MoS ₂微管比色法用于检测H ₂ O ₂检测限 (LOD) 为 0.51 μM，线性范围为 1.25 至 50 μM。比色法简单、选择性、灵敏，可检测 0.25–125 μM 范围内的谷胱甘肽 (GSH)，检测限 (LOD) 为 0.12 μM。因此，我们提供了一种简便的合成策略，用于同时集成电子调制和结构设计，以开发高效的基于 MoS ₂的功能催化剂。

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Hierarchical microtubes constructed using Fe-doped MoS2 nanosheets for biosensing applications

The structural design of multiple functional components could enhance the synergistic catalytic performance of MoS₂-based composites in enzyme-like catalysis. Herein, one-dimensional (1D) Fe-MoS₂ microtubes were designed to prepare tubular Fe-doped MoS₂ composites with MoO₃ microrods as self-sacrificing precursors. Remarkably, the results indicated that the generated ammonia released from the sulfidation process led to the dissolution of MoO₃ cores and the generation of a tubular structure. The Fe-MoS₂ composites integrated the synergistic effects of Fe-doped MoS₂ nanosheets (NSs) and the 1D tubular structure. Thus, a higher catalytic activity was observed in peroxidase-like catalysis than in other components, such as MoO₃@FeOOH, FeOOH and MoS₂ NSs. The peroxidase-like mechanism originated from the generation of the ˙OH radical. The Fe-MoS₂ microtube-based colorimetric assay was used to detect H₂O₂ with a detection limit (LOD) of 0.51 μM in a linear range from 1.25 to 50 μM. The colorimetric method was simple, selective, and sensitive for glutathione (GSH) detection in the range of 0.25–125 μM with a detection limit (LOD) of 0.12 μM. Thus, we provide a facile synthetic strategy for simultaneously integrating electronic modulation and structural design to develop an efficient MoS₂-based functional catalyst.

更新日期：2022-09-11

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