基于WO3/Pd复合纳米线材料的室温氢气可视化比色检测
Room-Temperature Visual Colorimetric Detection of Hydrogen Gas Based on WO3/Pd Composite Nanowires
摘要: 为了实现室温下对H2的可视化比色检测，本文通过水热法和化学还原法相结合，制备得到了具有一维纳米线形貌的WO3/Pd复合纳米线材料，通过SEM、TEM和XRD对敏感材料进行形貌表征和组分表征，表明我们的敏感材料已经成功制备。通过对30,000 ppm H2进行测试可知，WO3/Pd复合纳米线材料具有肉眼可见的由灰白色变为蓝色的颜色变化，而纯WO3材料几乎没有颜色变化。我们也对WO3/Pd复合纳米线进行了不同H2浓度测试、确定了2000 ppm H2为比色检测限，20,000 ppm H2为饱和点。同时也具有出色的选择性和循环稳定性。综合以上结果表明，WO3/Pd复合纳米线材料具有非常大的性能提升可归因于Pd对H2具有非常好的催化作用。因此本研究内容为氢能储运、工业生产及燃料电池系统等场景提供安全、便捷的监测方案。
Abstract: To realize the visual colorimetric detection of hydrogen (H2) at room temperature, this work combines the hydrothermal method with chemical reduction to fabricate WO3/Pd composite nanowires with a one-dimensional nanowire morphology. The sensitive materials were characterized by SEM, TEM, and XRD for morphology and composition analysis, confirming the successful preparation of the target material. Testing against 30,000 ppm H2 reveals that the WO3/Pd composite nanowires exhibit a distinct naked-eye visible color change from grayish-white to blue, whereas pure WO3 shows negligible color variation. Furthermore, we performed H2 concentration-dependent tests on the WO3/Pd composite nanowires, determining a colorimetric detection limit of 2000 ppm H2 and a response saturation point at 20,000 ppm H2. The material also demonstrates excellent gas selectivity and cyclic stability. Collectively, these results indicate that the significantly enhanced performance of the WO3/Pd composite nanowires can be attributed to the excellent catalytic effect of Pd toward H2. Therefore, this study provides a safe and convenient monitoring scheme for scenarios such as hydrogen energy storage and transportation, industrial production, and fuel cell systems.
文章引用：闫伯涵, 吕甜甜, 聂宗昊, 李秀玉, 祝孝栋. 基于WO3/Pd复合纳米线材料的室温氢气可视化比色检测[J]. 应用物理, 2026, 16(4): 349-359. https://doi.org/10.12677/app.2026.164032

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