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Porous and Homogeneous Nanoheterojunction-Accumulating PdO@ZnO Structure for Exhaled Breath Ammonia Sensing
Inorganic Chemistry ( IF 4.3 ) Pub Date : 2024-11-13 , DOI: 10.1021/acs.inorgchem.4c04094 Lifei Yin, Yutao Liu, Zhengxuan Song, Yuxin Wang, Yang Chen, Jinping Li, Libo Li, Jia Yao
Inorganic Chemistry ( IF 4.3 ) Pub Date : 2024-11-13 , DOI: 10.1021/acs.inorgchem.4c04094 Lifei Yin, Yutao Liu, Zhengxuan Song, Yuxin Wang, Yang Chen, Jinping Li, Libo Li, Jia Yao
The functional gas sensor device plays a pivotal role in intelligent medical treatment, among which metal oxide semiconductors are widely studied because of their inexpensiveness and ease of fabrication. However, the metal oxide sensors present a significant challenge in detecting NH3 at ppm levels within complex exhaled gases. Herein, the ZnO/PdO-x series were prepared by in situ loading palladium particles and calcining using nano-ZIF-8 as a precursor, which not only provided more transport path for ammonia adsorption but also achieved homogeneous nanoheterojunction accumulation structure. The tailor-made ZnO/PdO-2 sensor exhibits the optimum gas sensitivity, with a response value of 5.56 for 100 ppm of NH3 at 160 °C and a lower detection limit of 0.75 ppm. Particularly, it has a clear quantitative response to the actual exhaled gas of liver and kidney patients. By elucidating the intrinsic link between the in situ loading of MOF templates and the sensing mechanism, it is expected to broaden the rational design of metal-oxide sensors and thus provide an effective method for clinical detection.
中文翻译:
用于呼气氨传感的多孔和均相纳米异质结累积PdO@ZnO结构
功能性气体传感器器件在智能医疗中起着举足轻重的作用,其中金属氧化物半导体因其价格低廉、易于制造而被广泛研究。然而,金属氧化物传感器在检测复杂呼出气体中 ppm 级的 NH3 方面存在重大挑战。本文以纳米 ZIF-8 为前驱体,通过原位负载钯颗粒和煅烧制备了 ZnO/PdO-x 系列,不仅为氨吸附提供了更多的传输路径,还实现了均匀的纳米异质结积累结构。定制的 ZnO/PdO-2 传感器表现出最佳的气体灵敏度,在 160 °C 下对 100 ppm NH3 的响应值为 5.56,检测下限为 0.75 ppm。特别是,它对肝肾患者实际呼出的气体有明确的定量反应。通过阐明 MOF 模板的原位加载与传感机制之间的内在联系,有望拓宽金属氧化物传感器的合理设计,从而为临床检测提供一种有效的方法。
更新日期:2024-11-14
中文翻译:
用于呼气氨传感的多孔和均相纳米异质结累积PdO@ZnO结构
功能性气体传感器器件在智能医疗中起着举足轻重的作用,其中金属氧化物半导体因其价格低廉、易于制造而被广泛研究。然而,金属氧化物传感器在检测复杂呼出气体中 ppm 级的 NH3 方面存在重大挑战。本文以纳米 ZIF-8 为前驱体,通过原位负载钯颗粒和煅烧制备了 ZnO/PdO-x 系列,不仅为氨吸附提供了更多的传输路径,还实现了均匀的纳米异质结积累结构。定制的 ZnO/PdO-2 传感器表现出最佳的气体灵敏度,在 160 °C 下对 100 ppm NH3 的响应值为 5.56,检测下限为 0.75 ppm。特别是,它对肝肾患者实际呼出的气体有明确的定量反应。通过阐明 MOF 模板的原位加载与传感机制之间的内在联系,有望拓宽金属氧化物传感器的合理设计,从而为临床检测提供一种有效的方法。