The development of humidity sensors with excellent sensing performance is a great challenge in the field of material chemistry. Here, we synthesized 3DOM WO₃ nanomaterials through a poly(methyl methacrylate) template method, and first, we applied it to humidity measurement. For the goal of better sensing performance, the structural modification of Li/K-codoping was adopted, and the test results showed that Li/K-codoped 3DOM WO₃ possessed highly improved humidity sensing performances, such as high response, low-humidity hysteresis, good long-term stability, great repeatability, decent response, and recovery properties. To deeply understand the great effect of Li/K-codoping on sensing performance, the pure, Li-monodoped, and Li/K-codoped 3DOM WO₃-based humidity sensors were compared, and we found that the structure defects and adsorbed oxygen as well as the co-effect of Li/K dopants were key factors for the improved sensing performance. Additionally, a possible humidity sensitive mechanism was proposed to further study the promotion effect of Li/K-codoping on humidity sensing process.

中文翻译：

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具有可控结构修改的3DOM WO _3的湿度感测性能

具有出色传感性能的湿度传感器的发展是材料化学领域的巨大挑战。在这里，我们通过聚甲基丙烯酸甲酯模板方法合成了3DOM WO ₃纳米材料，首先将其应用于湿度测量。为了达到更好的感测性能，采用了Li / K共掺杂的结构改性，测试结果表明，Li / K共掺杂的3DOM WO ₃具有高响应性，低湿度滞后等高感度性能。 ，良好的长期稳定性，出色的可重复性，出色的响应能力和恢复性能。为了深入了解Li / K掺杂对传感性能的巨大影响，纯，Li-单掺杂和Li / K掺杂的3DOM WO ₃比较了基于湿度的湿度传感器，我们发现结构缺陷和吸附的氧气以及Li / K掺杂剂的协同效应是改善传感性能的关键因素。此外，提出了一种可能的湿度敏感机制，以进一步研究Li / K掺杂对湿度感测过程的促进作用。