Nanohybrids of a MXene and transition metal dichalcogenide for selective detection of volatile organic compounds
Nanohybrids of a MXene and transition metal dichalcogenide for selective detection of volatile organic compounds
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DOI：
10.1038/s41467-020-15092-4
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发表时间：
2020-03-10
影响因子：
16.6
通讯作者：
Stanciu, Lia
中科院分区：
文献类型：
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作者：
Chen, Winston Yenyu;Jiang, Xiaofan;Stanciu, Lia
二维过渡金属碳化物/氮化物，称为MXenes，最近已经受到关注的气体传感。然而，关于MXene和2D过渡金属二硫属化合物的杂化作为气敏材料的研究目前相对较少。在此，选择Ti 3C 2 Tx和WSe 2作为用于杂化的模型材料，并实现对各种挥发性有机化合物的检测。Ti（3）C（2）Tx/WSe 2混合传感器具有低噪声水平、超快的响应/恢复时间以及对各种挥发性有机化合物的良好灵活性。与原始Ti 3C 2 Tx相比，混合传感器对乙醇的灵敏度提高了12倍以上。此外，杂交过程通过限制来自Ti 3C 2 Tx边缘的水分子的相互作用提供了对抗MXene氧化的有效策略。提出了Ti 3C 2 Tx/WSe 2异质结构材料对含氧挥发性有机化合物的高灵敏度和高选择性检测的增强机理。这项工作的科学发现可以指导未来对下一代现场部署传感器的探索。
Two-dimensional transition metal carbides/nitrides, known as MXenes, have been recently receiving attention for gas sensing. However, studies on hybridization of MXenes and 2D transition metal dichalcogenides as gas-sensing materials are relatively rare at this time. Herein, Ti3C2Tx and WSe2 are selected as model materials for hybridization and implemented toward detection of various volatile organic compounds. The Ti(3)C(2)Tx/WSe2 hybrid sensor exhibits low noise level, ultrafast response/recovery times, and good flexibility for various volatile organic compounds. The sensitivity of the hybrid sensor to ethanol is improved by over 12-fold in comparison with pristine Ti3C2Tx. Moreover, the hybridization process provides an effective strategy against MXene oxidation by restricting the interaction of water molecules from the edges of Ti3C2Tx. An enhancement mechanism for Ti3C2Tx/WSe2 heterostructured materials is proposed for highly sensitive and selective detection of oxygencontaining volatile organic compounds. The scientific findings of this work could guide future exploration of next-generation field-deployable sensors.