Facile synthesis and high formaldehyde-sensing performance of NiO–SnO2 hybrid nanospheres
Facile synthesis and high formaldehyde-sensing performance of NiO–SnO2 hybrid nanospheres
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DOI：
10.1039/c5ra21063a
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发表时间：
2016-01
期刊：
影响因子：
3.9
通讯作者：
Guochen Zhang;Xue Han;W. Bian;J. Zhan;Xicheng Ma
中科院分区：
文献类型：
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作者：
Guochen Zhang;Xue Han;W. Bian;J. Zhan;Xicheng Ma
利用 NiO-SnO2 杂化纳米球成功制备了具有高灵敏度和优异选择性的甲醛气体传感器，该纳米球由 n 型多孔 SnO2 纳米球和 p 型 NiO 掺杂剂组成。通过 X 射线衍射 (XRD)、高分辨率电子显微镜 (HRTEM)、扫描电子显微镜 (SEM)、X 射线光电子能谱 (XPS)、Brunauer-Emmett-Teller (BET) 和能量色散 X 射线能谱 (EDS) 对其进行了表征。与纯 SnO2 相比，NiO 掺杂 SnO2 纳米球传感器表现出显着增强的甲醛传感性能，包括较低的最佳传感温度（约 100 °C）、较低的可检测阈值（0.5 ppm）、更高的灵敏度（响应 = 26.03 至 50 ppm HCHO）和卓越的选择性。根据我们的实验结果，还讨论了添加 NiO 的作用和可能的传感机制。
A formaldehyde gas sensor with high sensitivity and superior selectivity has been fabricated successfully with NiO–SnO2 hybrid nanospheres, which consisted of n-type porous SnO2 nanospheres and p-type NiO dopants. It has been characterized by X-ray diffraction (XRD), high-resolution electron microscopy (HRTEM), Scanning Electron Microscopy (SEM), X-ray photoelectron spectroscopy (XPS), Brunauer–Emmett–Teller (BET) and energy-dispersive X-ray spectroscopy (EDS). Compared with pure SnO2, the NiO-doped SnO2 nanospheres sensor exhibited significantly enhanced formaldehyde-sensing performances, including lower optimum sensing temperature (about 100 °C), lower detectable threshold (0.5 ppm), higher sensitivity (response = 26.03 to 50 ppm HCHO) and superior selectivity. Based on our experimental results, the role of the addition of NiO and a possible sensing mechanism has also been discussed.