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首页> 外文会议>TMS Annual Meeting Exhibition >2-D Nanosheets and Rod-Like WO_3 Obtained via Chemical Precipitation Method for Detecting Formaldehyde
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2-D Nanosheets and Rod-Like WO_3 Obtained via Chemical Precipitation Method for Detecting Formaldehyde

机译：通过化学沉淀法得到2-D纳米片和棒状WO_3，用于检测甲醛的化学沉淀方法

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In this paper, WO_3 nanosheets and rod-like were successfully prepared via chemical precipitation method for efficient sensing of formaldehyde gas at low working temperature. The structure and morphology of the precursors and the calcined products in air were characterized X-ray diffraction (XRD) and scanning electron microscopy (SEM). XRD analyses confirmed that the precursors were compound of monoclinic structure WO_3 and orthorhombic structure WO_3·0.33H_2O, whereas monoclinic structure WO_3 were obtained by calcining at 450°C for 2 h. Sensors fabricated by calcined WO_3 exhibited a quick response (5 s)/recovery (15 s) characteristic. The gas sensing texts showed the response value (Ra/Rg = 16.5) to 100 ppm HCHO at the optimum temperature of 300°C. The possible oxidation-reduction reaction mechanism of HCHO molecule on the sensor surface were researched and discussed too. WO_3 could be a promising sensing materials for detecting organic pollutants.
机译：在本文中，通过化学沉淀法成功制备了WO_3纳米片和棒状，以便在低工作温度下有效地感测甲醛气体。前体和空气中煅烧产物的结构和形态被表征为X射线衍射（XRD）和扫描电子显微镜（SEM）。 XRD分析证实，前体是单斜斜肌结构WO_3和正交结构WO_3·0.33H_2O的化合物，而通过在450℃下煅烧2小时，获得单斜斜肌结构WO_3。由煅烧WO_3制造的传感器表现出快速响应（5秒）/恢复（15秒）特征。气体传感文本在最佳温度为300℃下显示响应值（Ra / Rg = 16.5）至100ppm Hcho。研究和讨论了HCHO分子在传感器表面上的可能氧化还原反应机理。 WO_3可以是用于检测有机污染物的有前途的传感材料。

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