Acetone gas sensor based on NiO/ZnO hollow spheres: Fast response and recovery, and low (ppb) detection limit
Acetone gas sensor based on NiO/ZnO hollow spheres: Fast response and recovery, and low (ppb) detection limit
复制标题
基于 NiO/ZnO 空心球的丙酮气体传感器：快速响应和恢复，检测限低 (ppb)
DOI：
10.1016/j.jcis.2017.01.106
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发表时间：
2017-06-01
影响因子：
9.9
通讯作者：
Lu, Geyu
中科院分区：
文献类型：
--
作者：
Liu, Chang;Zhao, Liupeng;Lu, Geyu
采用溶剂热法在分散良好的ZnO空心球表面修饰大量NiO纳米粒子，制备了NiO/ZnO复合材料。利用各种表征方法对杂化材料的结构和形貌进行了研究。结果表明，NiO纳米粒子以分散的方式成功地分布在ZnO空心球表面，粒径约为10 nm。正如预期的那样，NiO/ZnO复合材料表现出显着的改善，在传感性能相比，纯ZnO空心球。例如，NiO/ZnO复合材料对100 ppm丙酮的响应类似于29.8，这比275 ℃下的原始ZnO高近4.6倍，并且响应/恢复时间分别为1/20 s。同时，检测限可达ppb级。提出了气敏性能提高的可能原因。(C)2017爱思唯尔公司All rights reserved.
NiO/ZnO composites were synthesized by decorating numerous Nio nanoparticles on the surfaces of well dispersed ZnO hollow spheres using a facile solvothermal method. Various kinds of characterization methods were utilized to investigate the structures and morphologies of the hybrid materials. The results revealed that the NiO nanoparticles with a size of similar to 10 nm were successfully distributed on the surfaces of ZnO hollow spheres in a discrete manner. As expected, the NiO/ZnO composites demonstrated dramatic improvements in sensing performances compared with pure ZnO hollow spheres. For example, the response of NiO/ZnO composites to 100 ppm acetone was similar to 29.8, which was nearly 4.6 times higher than that of primary ZnO at 275 degrees C, and the response/recovery time were 1/20 s, respectively. Meanwhile, the detection limit could extend down to ppb level. The likely reason for the improved gas sensing properties was also proposed. (C) 2017 Elsevier Inc. All rights reserved.