Abstract Two novel hierarchical WO3/NiO microspheres with porous and rough surface have been prepared through a simple one-stop hydrothermal method. Interestingly, it is a surprise that the introduction of different amounts of WO3 plays a critical role in the growth and self-assembly of nanosheets and then the morphology of microsphere. Further gas sensing experiment demonstrates that the sensor based on porous microsphere possesses prominent performance towards 100 ppm ethanol at the optimal working temperature of 300 °C compared with that of rough microsphere. It is believed that the enhanced gas sensing properties benefit from the porous structure on the surface with abundant active sites and gas passages for sufficient gas adsorption and diffusion.

中文翻译：

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水热合成具有增强气敏性能的分层WO3/NiO多孔微球

摘要 通过简单的一站式水热法制备了两种具有多孔粗糙表面的新型分层WO3/NiO微球。有趣的是，令人惊讶的是，不同量 WO3 的引入在纳米片的生长和自组装以及微球的形态中起着关键作用。进一步的气敏实验表明，与粗糙微球相比，基于多孔微球的传感器在300°C的最佳工作温度下对100 ppm乙醇具有突出的性能。据信，增强的气敏特性得益于表面的多孔结构，该结构具有丰富的活性位点和气体通道，用于充分的气体吸附和扩散。