Zhang Wenjuan, Yang Fuxiu, Liu Baining, Zhou Kaowen
Biochemical Engineering College, Beijing Union University, Beijing 100023, China.
Beijing Key Laboratory of Biomass Waste Resource Utilization, Beijing 100023, China.
ACS Omega. 2021 Jun 29;6(27):17576-17583. doi: 10.1021/acsomega.1c02098. eCollection 2021 Jul 13.
A sensitive diethyl ether gas sensor based on cataluminescence on nano-Pd/ZnNiAlO at a temperature lower than 150 °C was reported. The composition of the sensitive material was determined by energy-dispersive spectrometry, and a particle size of less than 50 nm was shown by transmission electron microscopy. When the atomic percentage of Pd in the sensing material is 0.8-1.3%, it is beneficial to the low-temperature and high-selective cataluminescence of diethyl ether. The signal response and recovery of diethyl ether on the sensitive material can be completed quickly in 0.5 s, and the relative standard deviation of the signal within 500 h of continuous operation is not more than 2.5%. There is good linear relationship between the luminescence intensity and the concentration of diethyl ether in the range of 0.08-75 mg/m. The detection limit (3σ) is 0.04 mg/m. The working conditions optimized by the response surface methodology were an analytical wavelength of 548.86 nm, a reaction temperature of 109.18 °C, and a carrier gas velocity of 125.88 mL/min. The sensitivity of the method can be increased by 4.5% under the optimized working conditions. The optimization method is universal for many multi-parameter processes.
报道了一种基于纳米 Pd/ZnNiAlO 上的催化发光在低于 150℃温度下的灵敏的二乙醚气体传感器。通过能量色散光谱法确定了敏感材料的组成，透射电子显微镜显示其粒径小于 50nm。当传感材料中 Pd 的原子百分比为 0.8 - 1.3%时，有利于二乙醚的低温高选择性催化发光。二乙醚在敏感材料上的信号响应和恢复可在 0.5s 内快速完成，连续运行 500h 内信号的相对标准偏差不超过 2.5%。在 0.08 - 75mg/m 的范围内，发光强度与二乙醚浓度之间存在良好的线性关系。检测限（3σ）为 0.04mg/m。通过响应面法优化的工作条件为分析波长 548.86nm、反应温度 109.18℃和载气速度 125.88mL/min。在优化的工作条件下，该方法的灵敏度可提高 4.5%。该优化方法对许多多参数过程具有通用性。
