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SnO2 recycled from tin slime for enhanced SO2 sensing properties by NiO surface decoration
Materials Science in Semiconductor Processing ( IF 4.1 ) Pub Date : 2020-08-01 , DOI: 10.1016/j.mssp.2020.105073
Yu Fu , Jianzhong Li , Haoyuan Xu

Abstract Tin slime is a byproduct of the electroplating tin production line. Tin slime is an important secondary resource, the main component of which is SnO2. In this paper, we discussed an environmentally friendly method to recover SnO2 from tin slime. The recovered SnO2 decorated by NiO has an excellent sensing response to SO2. The morphology, structure and surface state of the prepared materials were characterized by X-ray diffraction (XRD), N2 adsorption-desorption, scanning electron microscopy (SEM), transmission electron microscopy (TEM), X-ray phoyoelectron spectroscopy (XPS), and Raman spectroscopy. The SnO2 dispersed by PEG-400 exhibits smaller and more dispersed nanoparticles, which show responses of 6.5–100 ppm SO2 at 300 °C. Compared to the SnO2 sensor, the NiO surface decorated SnO2 sensor has significantly enhanced SO2 sensing performance, with a higher gas response, lower operating temperature and better selectivity. The sensing response of the NiO surface decorated SnO2 material to 100 ppm SO2 at 240 °C is as high as 10.38. This result likely occurs due to the increased oxygen vacancies and the formation of the p-n heterojunction between n-type SnO2 and p-type NiO. Importantly, this research has developed a simple and efficient method to recover SnO2 from the secondary resource tin.

中文翻译:

从锡泥中回收的 SnO2 通过 NiO 表面装饰增强 SO2 传感性能

摘要 锡泥是电镀锡生产线的副产品。锡泥是一种重要的次生资源,其主要成分是二氧化锡。在本文中,我们讨论了一种从锡泥中回收 SnO2 的环保方法。由 NiO 修饰的回收 SnO2 对 SO2 具有出色的传感响应。通过X射线衍射(XRD)、N2吸附-解吸、扫描电子显微镜(SEM)、透射电子显微镜(TEM)、X射线光电子能谱(XPS)、和拉曼光谱。由 PEG-400 分散的 SnO2 表现出更小、更分散的纳米粒子,在 300°C 下显示出 6.5-100 ppm SO2 的响应。与 SnO2 传感器相比,NiO 表面装饰的 SnO2 传感器显着增强了 SO2 传感性能,具有更高的气体响应、更低的工作温度和更好的选择性。NiO 表面装饰的 SnO2 材料在 240 °C 下对 100 ppm SO2 的传感响应高达 10.38。这种结果可能是由于氧空位增加以及 n 型 SnO2 和 p 型 NiO 之间形成 pn 异质结所致。重要的是,这项研究开发了一种简单有效的方法来从二次资源锡中回收 SnO2。这种结果可能是由于氧空位增加以及 n 型 SnO2 和 p 型 NiO 之间形成 pn 异质结所致。重要的是,这项研究开发了一种简单有效的方法来从二次资源锡中回收 SnO2。这种结果可能是由于氧空位增加以及 n 型 SnO2 和 p 型 NiO 之间形成 pn 异质结所致。重要的是,这项研究开发了一种简单有效的方法来从二次资源锡中回收 SnO2。
更新日期:2020-08-01
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