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首页> 外文期刊>Nanotechnology >Novel porous single-crystalline ZnO nanosheets fabricated by annealing ZnS(en)_(0,5) (en = ethylenediamine)precursor. Application in a gas sensor for indoor air contaminant detection
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Novel porous single-crystalline ZnO nanosheets fabricated by annealing ZnS(en)_(0,5) (en = ethylenediamine)precursor. Application in a gas sensor for indoor air contaminant detection

机译：通过退火ZnS（en）_（0,5）（en =乙二胺）前体制成的新型多孔单晶ZnO纳米片。在气体传感器中用于室内空气污染物检测的应用

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摘要

Novel single-crystalline ZnO nanosheets with porous structure have been fabricated by annealing ZnS(en)~(0.5) (en = ethylenediamine) complex precursor. The morphology and structure observations performed by field emission scanning electronic microscopy (FESEM) and high-resolution transmission electron microscopy (HRTEM) indicate that numerous mesopores with a diameter of about 26.1 nm distribute all through each nanosheet with a high density. The transformation of structure and composition of samples obtained during thermal treatment processes were investigated by x-ray diffraction (XRD), x-ray photoelectron spectrometry (XPS), thermogravimetric analysis (TGA), and Fourier transform infrared (FTIR) absorption spectroscopy. The formation mechanism of the porous structure is proposed. For indoor air contaminant detection in which formaldehyde and ammonia are employed as target gases, the as-prepared ZnO nanosheets were applied for the fabrication of gas sensors. It was found that the as-fabricated sensors not only exhibit highly sensitive performance, e.g., high gas-sensing responses, short response and recovery time, but also possess significant long-term stability. It is indicated that these ZnO nanostructures could promisingly be applied in electronic devices for environmental evaluation.
机译：通过退火ZnS（en）〜（0.5）（en =乙二胺）配合物前体，制备了具有多孔结构的新型单晶ZnO纳米片。通过场发射扫描电子显微镜（FESEM）和高分辨率透射电子显微镜（HRTEM）进行的形貌和结构观察表明，直径约26.1 nm的大量中孔以高密度分布在每个纳米片中。通过X射线衍射（XRD），X射线光电子能谱（XPS），热重分析（TGA）和傅里叶变换红外（FTIR）吸收光谱研究了在热处理过程中获得的样品的结构和组成的转变。提出了多孔结构的形成机理。对于以甲醛和氨气为目标气体的室内空气污染物检测，将所制备的ZnO纳米片用于气体传感器的制造。已经发现，所制造的传感器不仅表现出高度灵敏的性能，例如高的气敏响应，短的响应和恢复时间，而且还具有显着的长期稳定性。结果表明，这些ZnO纳米结构有望在电子器件中用于环境评估。

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