硫化钴薄膜对甲醛、乙醇和硫化氢的气敏特性

Gas-Sensing Properties of CoS Films Toward Formaldehyde, Ethanol, and Hydrogen Sulfide.

作者信息

Kim Myeong Gyu, Choi Yun-Hyuk

机构信息

Department of Advanced Materials and Chemical Engineering, Graduate School, Daegu Catholic University, Gyeongsan 38430, Gyeongbuk, Republic of Korea.

Department of Energy Materials, Daegu Catholic University, Gyeongsan 38430, Gyeongbuk, Republic of Korea.

出版信息

Materials (Basel). 2024 Nov 24;17(23):5743. doi: 10.3390/ma17235743.

DOI:10.3390/ma17235743

PMID:39685179

原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC11642285/

Abstract

The chemiresistive gas-sensing properties of pristine CoS film are little known despite its potential as a promising gas sensor material due to its intrinsic characteristics. In this study, a pristine polycrystalline CoS film (approximately 440 nm in thickness) is fabricated by depositing a CoO film followed by sulfidation to investigate its gas-sensing properties. The prepared CoS film sensor is found to exhibit high responsiveness towards formaldehyde (HCHO), ethanol (CHOH), and hydrogen sulfide (HS) at operating temperatures of 300 °C and 400 °C, with strong concentration dependence. On the other hand, the sensor shows very low or no responsiveness towards hydrogen (H), acetone (CHCOCH), and nitrogen dioxide (NO). These results enhance our understanding of the intrinsic gas-sensing properties of CoS, aiding in the design and fabrication of high-performance chemiresistive gas sensors based on CoS.

摘要

尽管原始CoS薄膜因其固有特性而具有成为有前景的气体传感器材料的潜力，但其化学电阻式气敏特性却鲜为人知。在本研究中，通过沉积CoO薄膜然后进行硫化制备了原始多晶CoS薄膜（厚度约为440 nm），以研究其气敏特性。发现制备的CoS薄膜传感器在300°C和400°C的工作温度下对甲醛（HCHO）、乙醇（CH₃OH）和硫化氢（H₂S）表现出高响应性，且具有很强的浓度依赖性。另一方面，该传感器对氢气（H₂）、丙酮（CH₃COCH₃）和二氧化氮（NO₂）的响应非常低或无响应。这些结果加深了我们对CoS固有气敏特性的理解，有助于基于CoS设计和制造高性能化学电阻式气体传感器。