Ratiometric Cataluminescence for Rapid Recognition of Volatile Organic Compounds Based on Energy Transfer Process

Abstract

Recognition of volatile organic compounds (VOCs) is a hot topic full of challenge from the perspective of environmental protection and human security. Here, we developed a novel ratiometric cataluminescence (RCTL) method for fast identification and detection gas compounds at various concentrations based on the energy transfer process, by the means of introducing rare earth ions codoped metal oxide into cataluminescence (CTL) sensor system to work as sensing material. When the prepared stick-like Y2O3:Eu3+,Tb3+ is exposed to kinds of analytes, different energy transfer process take place to emit two new signals at the characteristic wavelength of Tb3+ (ITb) and Eu3+ (IEu), which is available for us to identify miscellaneous gaseous compounds rely on the ratio of ITb to IEu (ITb/IEu). To confirm the feasibility of the proposed method, seven kinds of gas compounds, including homologous series and even structural isomers, were investigated and successfully distinguished in a wide range of concentrations. Besides, further discussion of the CTL sensing and recognition mechanism in this paper has facilitating effects on exploring reactive intermediates and explaining the essential principle of catalytic oxidation process.

Recent advances in methodologies and applications of cataluminescence sensing

“…Using six linear regression F I G U R E 1 Schematic diagram of the whole procedure of catalytic oxidation reaction F I G U R E 2 Historical timeline of cataluminescence (CTL)-based sensing. [6,[10][11][12][13][14][15][16][17][18][19][20][21][22][23][24][25][26][27][28][29] Copyright American Chemical Society, Elsevier B.V and Royal Society of Chemistry equations and the CTL signal versus concentrations of three gases at two temperatures as calibration, artificial samples of mixtures containing three compounds could be detected and analyzed, extending the application to mixture monitoring. Furthermore, they designed a 3 × 3 CTL sensor array [13] Figure 3(a).…”

Optimization of Working Conditions by Response Surface Methodology of Sulfur Dioxide Gas Sensors Based on Au/CoO‐2La2WO6 Nanoparticles

“…Cataluminescence (CTL), a kind of luminescence emitted from heterogeneous catalytic oxidation reactions on gas‐solid interface, is a promising technology for making gas sensors . In recent years, a series of CTL analytical applications have been attempted to develop for sulfur dioxide and other molecules at different laboratories.…”

“…Our previous work has proposed that CTL baseline instability will occur in a small heat capacity system when the working temperature exceeds 200 °C . In some existing literatures, the working temperature of CTL‐based analytical methods was much higher than 200 °C. They are not suitable for making CTL gas sensors.…”

“…In the past, the working conditions of CTL method were simply determined by single factor experiment . We know that the premise of single factor experiment is to assume that there is no interaction between various factors.…”

Dendritic fibrous nano-silica & titania (DFNST) spheres as novel cataluminescence sensing materials for the detection of diethyl ether

“…Cataluminescence (CTL)-based sensors, as one type of gas sensors, possess further excellent detection advantages of rapid response, high signal/noise ratio (S/N), stable and durable intensity, etc. 2,3,7 In short, CTL-based sensors provide a versatile path for VOCs differentiation.…”