Cataluminescence System Coupled with Vacuum Desorption–Sampling Methodology for Real-Time Ozone Sensing during the Self-Decomposition Process on Functional Boron Nitride

Abstract

The treatment and detection of ozone have been widely studied in recent decades with respect to toxicity and contamination, while the measurement method of ozone is relatively toneless. Fortunately, a new concept of the cataluminescence (CTL) sensor provides a scheme of real-time ozone sensing in a tiny system. Here, a novel CTL sensor system was specially developed with silica-hydroxyl functional boron nitride as the sensing material for rapid and sensitive ozone detection. Coupled with the construction of a pulse vacuum static sampling system, ozone on the surface of sensing material can be desorbed rapidly and can step into the next detection circulation in a few seconds. Based on the strong emission initiated by the transient of reactive oxygen species (ROS) including singlet oxygen, a trioxide group, and an oxygen radical, the detection limit of ozone could be optimized to be as low as 51.2 ppb. Besides, the sensor system exhibited remarkable anti-interference performance in which humidity changes and common VOCs do not disturb or weakly disturb ozone sensing, and the CTL mechanism of the multistep degradation process was further discussed on the basis of multiple pieces of experimental evidence and a DFT transient calculation. A real-time degradation–sensing module was further attached to the system to realize the functions of ozone decomposition and real-time monitoring.

Controllable Synthesis of Defective UiO-66 for Efficient Degradation and Detection of Ozone

“…Furthermore, direct adsorption solely by hydroxyl sites was found to possess higher energy and thus was disregarded (Δ G 2′ = 11.4 kcal/mol), as shown in Figure S12. Finally, two potential reaction pathways were proposed under dry and wet conditions (Figure S13), based on a combination of experiments, theoretical calculations, and previous literature reports. ,− The obtained results validated the role of the modulator in inducing ligand defects to facilitate the formation of reaction sites while also emphasizing the significance of humidity conditions, wherein both endogenous hydroxyl and exogenous water molecules could enhance the catalytic oxidation of ozone.…”

“…Ground-level ozone has emerged as a prominent air pollutant that demands attention due to the extensive release of ozone precursors, including nitrogen oxides (NOx: NO and NO 2 ) and volatile organic compounds (VOCs). , Therefore, precise monitoring and efficient degradation of ozone are crucial for addressing air pollution and improving living conditions. , Metal–organic frameworks (MOFs) have attracted considerable attention from researchers owing to their ability to maintain efficient ozone degradation even under high humidity conditions, setting them apart from commonly used catalysts such as zeolites, supported noble metals, and metal oxides . Various structures, such as Fe-MOF, 3D Mn-MOF, and the bimetallic MOF strategy (PCN-250­(Fe 2 Co)), have been developed for efficient ozone decomposition.…”

Recent trends in ozone sensing technology

“…The sensor also counteracted interference due to humidity variations and common VOCs. 107 This novel ozone sensor was employed to detect ozone gas produced by a commercial ozone-producing instrument. The LabVIEW software was employed to monitor the changes in the resistance of single-walled carbon nanotubes in the sensor through an automated process.…”

Instant Fingerprint Discrimination for Military Explosive Vapors by Dy3+ Doping a La2O3-Based Cataluminescence Sensor System

“…Cataluminescence (CTL) , has quickly become a vital sensing transduction principle for real-time monitoring of air pollutants with the advantages of simplicity, nonconsumption of catalysts, as well as rapid and reversible response, which is promising in fulfilling the aforementioned requirements. By capturing the luminescence emission generated from the excited active intermediates during the catalytic oxidation of gaseous molecules on the surface of catalysts, characteristic optical information, including emission intensity, − emission wavelength, − response/recovery time, and spectral shape, , can be obtained and used for various compounds’ detection and discrimination . Typically, the CTL sensor array that was first developed in 2005 by Cao and Zhang utilizing cross-reactive patterns has been applied for detecting and identifying chemical species, such as hydrocarbons, saccharides, xylene isomers, etc.…”