Detection of ethanol gas using In2O3 nanoparticle-decorated ZnS nanowires
Detection of ethanol gas using In2O3 nanoparticle-decorated ZnS nanowires
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DOI：
10.1016/j.snb.2017.03.120
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发表时间：
2017-09-01
影响因子：
8.4
通讯作者：
Park, Sunghoon
中科院分区：
文献类型：
--
作者：
Kim, Kyoung-Kook;Kim, Dongjun;Park, Sunghoon
采用三步工艺制备了一种由In2O3纳米颗粒修饰的ZnS纳米线气体传感器。以ZnS粉为前驱体，采用气-液-固机制制备了ZnS纳米线。采用水热法制备了In2O3纳米颗粒。将In2O3纳米粒子自旋涂覆在ZnS纳米线表面，并在500℃真空中退火1h。当乙醇浓度为500ppm时，这些纳米线的乙醇气体传感响应是原始ZnS纳米线的2.9倍。用纳米tio2修饰ZnS纳米线，提高了传感器对乙醇气体和其他挥发性有机气体的选择性。此外，由于ZnS和In2O3是已知的有效的乙醇气敏材料，它们的组合产生了乙醇气敏，选择性和灵敏度的协同效应。在这项研究中，我们合成了一种含有In2O3纳米粒子和ZnS纳米线的混合结构来制作高响应的乙醇气体传感器。我们还研究了该传感器的乙醇气体传感机理。(C) 2017 Elsevier B.V.版权所有
An In2O3 nanoparticle-decorated ZnS nanowire gas sensor was fabricated by following a three-step process. The ZnS nanowires were fabricated by the vapor-liquid-solid mechanism using ZnS powder as a precursor. The In2O3 nanoparticles were fabricated by a hydrothermal mechanism. The In2O3 nanoparticles were spin coated on the surface of the ZnS nanowires, and the resulting sample was annealed for 1 h at 500 degrees C in vacuum. The ethanol gas sensing response of these nanowires was 2.9 times higher than that of pristine ZnS nanowires when these sensors were exposed to 500 ppm ethanol. The selectivity of the resulting sensor to ethanol gas among the other volatile organic compounds gases also improved by the decoration of ZnS nanowires with In2O3 nanoparticles. Furthermore, since ZnS and In2O3 are known as effective ethanol gas sensing materials, their combination creates a synergistic effect for ethanol gas sensing, selectivity, and sensitivity. In this study, we synthesized a hybrid structure containing In2O3 nanoparticles and ZnS nanowires to fabricate a high-response ethanol gas sensor. We also investigated the ethanol gas sensing mechanism of the resulting sensor. (C) 2017 Elsevier B.V. All rights reserved.