A kind of novel n–n combined ordered mesoporous WO₃/ZnO (OM‐WO₃/ZnO) sensor are successfully fabricated in this study. A soft‐template method is used to synthesize the ordered mesoporous ZnO matrix. Surfaces of the ZnO matrix are innovatively modified using silane coupling agent (mark as: OM‐ZnO‐Si), and then a layer of WO₃ film is assembled on the surfaces of the OM‐ZnO‐Si by chemical plating method for the first time, and the OM‐WO₃/ZnO material is obtained. The prepared OM‐WO₃/ZnO sample shows a kind of regular hexagon‐sheet structure. The prepared OM‐WO₃/ZnO sensor shows the much better response, much shorter response time, much lower detection limit, and the more excellent selectivity toward NO_x gas. When oxynitride (NO_x) gas concentration is 100 ppm, the response reaches to 82.64%, the response time is only 6 s at room temperature. The detection limit is only 0.01 ppm. The unique loose porous structure and the synergistic effect of the n–n heterojunction structure endow the prepared OM‐WO₃/ZnO material with the superior gas sensing properties. The n–n combined OM‐WO₃/ZnO material shows the vast development potential in gas sensor field.

中文翻译：

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化学镀制备的有序介孔WO3 / ZnO的增强的NOx气敏特性

在这项研究中成功地制造了一种新颖的n–n组合有序介孔WO ₃ / ZnO（OM‐WO ₃ / ZnO）传感器。使用软模板方法合成有序的介孔ZnO基质。首先使用硅烷偶联剂（标记为：OM-ZnO-Si）对ZnO基体表面进行创新性修饰，然后通过化学镀方法在OM-ZnO-Si的表面上组装一层WO ₃膜。时间，并获得OM-WO ₃ / ZnO材料。制备的OM-WO ₃ / ZnO样品显示出一种规则的六边形薄片结构。准备好的OM‐WO ₃/ ZnO传感器显示出更好的响应，更短的响应时间，更低的检测限以及对NO _x气体的更出色的选择性。当氮氧化物（NO _x）气体浓度为100 ppm时，响应达到82.64％，在室温下响应时间仅为6 s。检出限仅为0.01 ppm。独特的疏松多孔结构和n–n异质结结构的协同效应使所制备的OM‐WO ₃ / ZnO材料具有出色的气敏特性。n–n组合的OM‐WO ₃ / ZnO材料显示出在气体传感器领域的巨大发展潜力。