Wang Hongyan, Shao Ziyu, Shi Xiaoqi, Tang Zhuo, Sun Bai
Department of Radiation Oncology, The First Affiliated Hospital of Anhui Medical University, Hefei 230022, China.
Engineering Research Center of Building Energy Efficiency Control and Evaluation of the Ministry of Education, College of Environment and Energy Engineering, Anhui Jianzhu University, Hefei 230601, China.
Anal Methods. 2023 Nov 2;15(42):5620-5629. doi: 10.1039/d3ay01307c.
In this paper, a cataluminescence (CTL) gas sensor based on flower-like molybdenum disulfide (MoS) is developed. The experimental results show that it has high sensitivity and selectivity to acetaldehyde. The CTL sensor has the advantage of fast response; the response time is about 3 s and the recovery time is about 40 s. The optimal working temperature of this sensor is 174 °C, which is lower than that of the CTL sensors used for acetaldehyde detection in many other reports. Under the optimized conditions, the CTL signal intensity shows a good linear relationship with acetaldehyde concentration ( = 0.9991) within the concentration range of 40-2000 ppm, and the detection limit (LOD) is 3.75 ppm. The selectivity experiment results show that the sensor has an obvious response to acetaldehyde and a very weak response to acetic acid, and has no response to many other VOCs (ether, cyclohexane, butyl ether, carbon tetrachloride, ethanol, toluene, formaldehyde, glycerol, trichloromethane and xylene). After 8 repeated measurements for four weeks, the relative standard deviation (RSD) of the CTL sensor is 1.03%, indicating that it has good reproducibility and stability, which shows that the CTL sensor has a promising prospect for the detection of acetaldehyde.
本文研制了一种基于花状二硫化钼（MoS）的催化发光（CTL）气体传感器。实验结果表明，该传感器对乙醛具有高灵敏度和高选择性。该CTL传感器具有响应速度快的优点；响应时间约为3 s，恢复时间约为40 s。该传感器的最佳工作温度为174℃，低于许多其他报道中用于乙醛检测的CTL传感器的工作温度。在优化条件下，在40 - 2000 ppm浓度范围内，CTL信号强度与乙醛浓度呈现良好的线性关系（ = 0.9991），检测限（LOD）为3.75 ppm。选择性实验结果表明，该传感器对乙醛有明显响应，对乙酸响应较弱，对许多其他挥发性有机化合物（醚、环己烷、丁醚、四氯化碳、乙醇、甲苯、甲醛、甘油、三氯甲烷和二甲苯）无响应。经过四周8次重复测量，该CTL传感器的相对标准偏差（RSD）为1.03%，表明其具有良好的重现性和稳定性，这表明该CTL传感器在乙醛检测方面具有广阔的应用前景。
