Two-dimensional Ti3C2Tx MXene/SnO nanocomposites: towards enhanced response and selective ammonia vapor sensor at room temperature
Two-dimensional Ti3C2Tx MXene/SnO nanocomposites: towards enhanced response and selective ammonia vapor sensor at room temperature
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DOI：
10.1016/j.snb.2022.131501
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发表时间：
2022-01
期刊：
影响因子：
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通讯作者：
Lijia Yao;Xu Tian;Xiuxiu Cui;Rongjun Zhao;Mingjing Xiao;Bingsen Wang;X. Xiao;Yude Wang
中科院分区：
文献类型：
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作者：
Lijia Yao;Xu Tian;Xiuxiu Cui;Rongjun Zhao;Mingjing Xiao;Bingsen Wang;X. Xiao;Yude Wang
氨检测在日常生活中对人体健康具有重要意义。人体呼出的氨在诊断疾病中起着重要作用，而环境空气中的氨会伤害我们的身体。本文采用一步水热法合成了Ti 3C 2 TxMXene/SnO复合材料。通过XRD、SEM、TEM、XPS等分析表明，成功制备了Ti 3C 2 TxMXene/SnO复合材料。此外，SnO和Ti 3C 2 TxMXene之间形成的特殊键合抑制了SnO的氧化。在室温（23 ± 2 °C）的工作温度下，该Ti 3C 2 TxMXene/SnO传感器对200 ppm氨蒸气具有7.8的高传感性能，并具有良好的选择性、重复性、防潮性和长期稳定性。此外，它显示出相对较短的响应时间和恢复时间，分别为61 s和119 s。由于Ti 3C 2 TxMXene和SnO的功函数不同，在SnO纳米片和Ti 3C 2 Tx多层膜之间形成肖特基势垒。p-n结使Ti 3C 2 TxMXene/SnO表面的电子富集，增强了响应。希望这种具有出色选择性和低氨检测的材料将有助于未来诊断肾脏疾病。
Ammonia detection is significant for human health in our daily life. Ammonia exhaled from people plays a role in diagnosing diseases, and ammonia from ambient air can harm our bodies. In this work, Ti3C2TxMXene/SnO is synthesized by the one-step hydrothermal method. From the XRD, SEM, TEM, XPS analysis results, it is concluded that Ti3C2TxMXene/SnO is successfully prepared. Moreover, a special bonding formed between SnO and Ti3C2TxMXene inhibits the oxidation of SnO. At room temperature (23 ± 2 °C) of operating temperature, this Ti3C2TxMXene/SnO sensor exhibits high sensing performances of 7.8 for 200 ppm ammonia vapor and good selectivity, repeatability, moisture resistance, and long-term stability. Moreover, it shows a relatively short response time and recovery time of 61 s and 119 s. Due to the different work functions of Ti3C2TxMXene and SnO, a Schottky barrier is formed between the SnO nanosheets and the Ti3C2Txmulti-layers. The p-n junction enriches the electron on the surface of Ti3C2TxMXene/SnO that enhancing the response. It’s hoped this material with such excellent selectivity and low ammonia detection will help diagnose kidney diseases in the future.