基于 NiO 纳米粒子的 Cataluminescence 传感器用于灵敏检测乙醛。

A Cataluminescence Sensor Based on NiO Nanoparticles for Sensitive Detection of Acetaldehyde.

机构信息

School of Public Health, Guangdong Pharmaceutical University, Guangzhou 510310, China.

出版信息

Molecules. 2020 Mar 1;25(5):1097. doi: 10.3390/molecules25051097.

DOI:10.3390/molecules25051097

PMID:32121474

原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC7179132/

Abstract

Sensitive and selective detection of harmful gas is an important task in environmental monitoring. In this work, a gas sensor based on cataluminescence (CTL) for detection of acetaldehyde was designed by using nano-NiO as the sensing material. The sensor shows sensitive response to acetaldehyde at a relatively low working temperature of 200 °C. The linear range of CTL intensity versus acetaldehyde concentration is 0.02-2.5 mg/L, with a limit of detection of 0.006 mg/L at a signal-to-noise ratio of three. Mechanism study shows that electronically excited CO is the excited intermediate for CTL emission during the catalytic oxidation of acetaldehyde on the NiO surface. The proposed sensor has promising application in monitoring acetaldehyde in residential buildings and in the workplace.

摘要

敏感和选择性地检测有害气体是环境监测中的一项重要任务。在这项工作中，设计了一种基于气敏发光（CTL）的气体传感器，用于检测乙醛，其传感材料为纳米 NiO。该传感器在相对较低的工作温度 200°C 下对乙醛表现出敏感的响应。CTL 强度与乙醛浓度的线性范围为 0.02-2.5 mg/L，信噪比为 3 时，检测限为 0.006 mg/L。机理研究表明，在 NiO 表面催化氧化乙醛过程中，电子激发态的 CO 是 CTL 发射的激发中间体。所提出的传感器有望应用于监测住宅和工作场所中的乙醛。