快速检测致癌物乙醛：低工作温度花状MoS2催化发光传感器的制备及应用,Analytical Methods

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快速检测致癌物乙醛：低工作温度花状MoS2催化发光传感器的制备及应用
Analytical Methods ( IF 2.7 ) Pub Date : 2023-10-18 , DOI: 10.1039/d3ay01307c
Hongyan Wang ₁ , Ziyu Shao ₁ , Xiaoqi Shi ₁ , Zhuo Tang ₂ , Bai Sun _{2,

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Affiliation

本文开发了一种基于花状二硫化钼（MoS2）_{的催化发光（CTL）气体传感器。}实验结果表明，该方法对乙醛具有较高的灵敏度和选择性。CTL传感器具有响应速度快的优点；响应时间约为3秒，恢复时间约为40秒。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传感器的温度。在优化条件下，CTL信号强度在40-2000 ppm浓度范围内与乙醛浓度呈现良好的线性关系（R ^{2 = 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的响应，对乙酸响应极弱，对多种其他VOCs（乙醚、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）。经过8次为期4周的重复测量，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CTL传感器在乙醛检测方面具有广阔的前景。

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Rapidly detecting the carcinogen acetaldehyde: preparation and application of a flower-like MoS2 cataluminescence sensor at low working temperature

In this paper, a cataluminescence (CTL) gas sensor based on flower-like molybdenum disulfide (MoS₂) 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 (R² = 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.

更新日期：2023-10-19

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