The fabrication and testing of hierarchical architecture based Zinc Ferrite-Zinc oxide (ZnFe ₂ O ₄ -ZnO) magnetic semiconductor (MS) sensor, for the detection of Hydrogen (H ₂ ) down to 50 parts per million (ppm) at room temperature, are reported in this study. The synthesis of ZnFe2O4-ZnO heterostructure has been carried out using a simple hydrothermal route. The MS sensor shows good sensitivity, quick response, and remarkably good recovery to H ₂ at room temperature. A rise in the magnetic movement is verified in ZnFe ₂ O ₄ -ZnO heterostructure with the interaction of reducing H ₂ gas. The sensor exhibits a detection limit of 8.9 ppm with the highest sensitivity of 20% for the detection of 900 ppm of H ₂ , with a response time of 35–55 s. The sensitivity of the MS sensor towards some of the breath volatile organic compounds (VOCs) and cross-sensitivity of H ₂ and carbon dioxide (CO ₂ ) are analysed. The work is aimed to provide a straightforward approach for the H ₂ breath test using magnetic particles that have the potential to become a portable device for diagnostics.

中文翻译：

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氢检测用磁半导体电阻器

基于分层架构的锌铁氧体-氧化锌（ZnFe ₂ O ₄ -ZnO）磁性半导体（MS）传感器的制造和测试 ，用于 在室温下检测低至百万分之50的氢气（H ₂），在这项研究中有所报道。ZnFe2O4-ZnO异质结构的合成已使用简单的水热路线进行。MS传感器显示出良好的灵敏度，快速的响应以及在室温下对H _2的显着良好的回收率 。在ZnFe ₂ O ₄ -ZnO异质结构中通过还原H ₂的相互作用 证实了磁运动的上升 气体。该传感器的检出限为8.9 ppm，对于检测900 ppm H ₂的最高灵敏度为20％， 响应时间为35-55 s。分析了MS传感器对某些呼吸性挥发性有机化合物（VOC）的敏感性以及H ₂和二氧化碳（CO ₂ ）的交叉敏感性 。这项工作旨在为使用磁性粒子的H ₂呼气测试提供一种简单的方法，这种 磁性粒子有可能成为诊断的便携式设备。