Combustion synthesized hierarchically porous WO3 for selective acetone sensing

Combustion synthesized hierarchically porous WO3 for selective acetone sensing
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燃烧合成分级多孔 WO3 用于选择性丙酮传感

DOI:
10.1016/j.matchemphys.2016.09.036
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发表时间:
2016-12
影响因子:
4.6
通讯作者:
Wang Yude
Wang Yude
中科院分区:
材料科学3区
文献类型:
--
作者:
Chen Gang;Xiao Xuechun;Igor Djerdj;Wang Yude

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设计了一种简单、廉价的燃烧路线来合成分级多孔 WO3。钨源是通过将钨粉溶解在过氧化氢中而得到的新鲜过氧钨酸。为了促进燃烧反应,使用甘氨酸和水合肼的组合燃料。微观结构是由亚基纳米颗粒组成的连通良好的孔。当暴露于丙酮气体时,多孔WO3基传感器在300°C的工作温度下表现出高气体响应、快速响应和恢复以及5-1000 ppm范围内的良好选择性。这种优异的传感性能似乎归因于多孔形态,因此为气体分子的反应提供了更多的活性位点。
An easy, inexpensive combustion route was designed to synthesize hierarchically porous WO3. The tungsten source was fresh peroxiotungstic acid by dissolving tungsten powder into hydrogen peroxide. To promote the combustion reaction, a combined fuel of both glycine and hydrazine hydrate was used. The microstructure was well-connected pores comprised of subunit nanoparticles. Upon exposing towards acetone gas, the porous WO3based sensor exhibits high gas response, rapid response and recovery, and good selectivity in the range of 5–1000 ppm under working temperature of 300 °C. This excellent sensing performance was plausibly attributed to the porous morphology, which hence provides more active sites for the gas molecules' reaction.
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