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首页> 外文期刊>Physica, B. Condensed Matter >Sensing of LPG with nanostructured zinc oxide thin films grown by spray pyrolysis technique
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Sensing of LPG with nanostructured zinc oxide thin films grown by spray pyrolysis technique

机译：喷雾热解技术制备的纳米结构氧化锌薄膜对液化石油气的传感

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Nanostructured zinc oxide thin films were prepared by spray pyrolysis technique using Zn(NO_3)_2·6H_2O as the precursor solution. The resulting films were investigated by X-ray diffraction and scanning electron microscopy to know crystal structure, size of crystallites and surface morphology. The films have been found to be polycrystalline zinc oxide, possessing hexagonal wurtzite crystal structure and nanocrystallite with grain size of approximately 3035 nm. The LPG sensing performance of the films has been investigated at various concentrations of LPG in air at operating temperatures varying from 225 to 400°C. At 325°C the maximum responses of 46.3% and 48.9% have been observed, respectively, for concentrations of 0.8 and 1 vol% of LPG in air (1 vol% of LPG in air corresponds to 50% LEL of LPG in air). The recovery time has been found to be less than the response time for all concentrations of LPG. A possible reaction mechanism of LPG sensing has been proposed.
机译：以Zn（NO_3）_2·6H_2O为前驱体，采用喷雾热解法制备了纳米结构的氧化锌薄膜。通过X射线衍射和扫描电子显微镜研究所得膜，以了解晶体结构，微晶尺寸和表面形态。已经发现该膜是多晶氧化锌，具有六方纤锌矿晶体结构和纳米晶体，其晶粒尺寸约为3035nm。已经研究了在225至400°C的工作温度下，在空气中各种LPG浓度下薄膜的LPG传感性能。在325°C下，空气中LPG的浓度为0.8和1 vol％时，观察到的最大响应分别为46.3％和48.9％（空气中LPG的1vol％相当于空气中LPG的LEL的50％）。已经发现，对于所有浓度的LPG，恢复时间都小于响应时间。已经提出了LPG传感的可能的反应机理。

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