School of Physical Sciences, Solapur University, Solapur - 413255, Maharashtra, India.
Dalton Trans. 2018 Dec 4;47(47):16840-16845. doi: 10.1039/c8dt03667e.
We report a facile synthesis of Ru-loaded WO3 marigold structures through a hydrothermal route and their bidirectional applications as enhanced H2S gas sensors and efficient sunlight-driven photocatalysts. The developed hierarchical marigold structures provide effective gas diffusion channels via a well-aligned mesoporous framework, resulting in remarkable enhancement in the sensing response to H2S. The temperature and gas concentration dependence on the sensing properties reveals that Ru loading not only improves the sensing response, but also lowers the operating temperature of the sensor from 275 to 200 °C. The 0.5 wt% Ru-loaded WO3 shows selective response towards H2S, which is 45 times higher (142) than that of pristine WO3 (3.16) sensor, whereas the 0.25 wt% Ru-loaded WO3 exhibits the highest photocatalytic activity, as shown by the degradation of rhodamine B (RhB) under natural sunlight. The gas sensing and photocatalytic properties are explained through the role of Ru and the structural and morphological properties of the developed material.
我们通过水热法报告了 Ru 负载 WO3 万寿菊结构的简便合成及其作为增强 H2S 气体传感器和高效阳光驱动光催化剂的双向应用。所开发的分级万寿菊结构通过良好排列的介孔框架提供了有效的气体扩散通道，从而显著提高了对 H2S 的传感响应。对传感性能的温度和气体浓度依赖性表明，Ru 负载不仅提高了传感响应，而且将传感器的工作温度从 275°C 降低到 200°C。负载 0.5wt% Ru 的 WO3 对 H2S 表现出选择性响应，比原始 WO3（3.16）传感器高 45 倍（142），而负载 0.25wt% Ru 的 WO3 表现出最高的光催化活性，如天然阳光下罗丹明 B（RhB）的降解所示。通过 Ru 的作用以及所开发材料的结构和形态特性解释了气体传感和光催化性能。
