Cadmium sulfide activated zinc oxide coatings deposited by liquid plasma spray for room temperature nitrogen dioxide detection under visible light illumination
Cadmium sulfide activated zinc oxide coatings deposited by liquid plasma spray for room temperature nitrogen dioxide detection under visible light illumination
复制标题
液体等离子喷涂沉积的硫化镉活化氧化锌涂层用于可见光照射下室温二氧化氮检测
DOI：
10.1016/j.ceramint.2015.11.170
复制
发表时间：
2016-03-01
影响因子：
5.2
通讯作者：
Debliquy, Marc
中科院分区：
文献类型：
--
作者：
Geng, Xin;Zhang, Chao;Debliquy, Marc
众所周知，氧化锌（ZnO）被用作气敏材料。然而，由于其较高的工作温度，ZnO基气体传感器的化学和热稳定性相对较低。近年来，一些研究者采用光照作为激活源，以取代加热，在低温下获得高的气敏性能。接下来的研究是尝试使用硫化镉（CdS）作为敏化剂，在室温下，在可见光照明的帮助下激活氧化锌。以醋酸锌和硫化镉为前驱体，采用液相等离子喷涂技术制备了CdS-ZnO涂层。采用X射线衍射仪（XRD）和场发射扫描电子显微镜（FE-SEM）对CdS-ZnO涂层的晶体结构进行了表征。基于CdS-ZnO涂层的传感器的感测性能在室温下在各种可见光照射下以1 ppm的二氧化氮（NO2）进行测试。结果表明，LPS工艺是一种简单的方法，用于沉积高性能的CdS-ZnO敏感层，所获得的传感器在室温下显示出高的响应NO2。(C)2015 Elsevier Ltd和Techna Group S.r.l. All rights reserved.
Zinc oxide (ZnO) is well-known to be used as a gas sensing material. However, due to its high operation temperature, the chemical and thermal stability of ZnO based gas sensors are relatively low. In recent years, some researchers adopt light illumination as activated source to replace heating and obtain high gas sensing performance at low temperature. The study that follows is an attempt to use cadmium sulfide (CdS) as sensitizer to activate ZnO at room temperature with assistance of visible-light illumination. CdS-ZnO coatings were deposited by liquid plasma spray with aqueous solution containing zinc acetate and cadmium sulfide as precursors. The crystal structure of as-sprayed CdS-ZnO coatings was characterized by X-ray diffractometer (XRD) and field-emission scanning electron microscopy (FE-SEM). The sensing performance of sensors based on CdS-ZnO coatings were tested with 1 ppm nitrogen dioxide (NO2) at room temperature illuminated under various visible lights. The results demonstrated that the LPS process was a straightforward method for deposition of high performance CdS-ZnO sensitive layers and the obtained sensors showed high responses to NO2 at room temperature. (C) 2015 Elsevier Ltd and Techna Group S.r.l. All rights reserved.