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Cataluminescence sensor for highly sensitive and selective detection of iso-butanol
摘要： In this paper, a gaseous sensor was described for detection of iso-butanol on the basis of its strong cataluminescence (CTL) emission on nano-MgO surface. The sensor showed high sensitivity and specificity to iso-butanol with response time less than 1 s and recovery time less than 18 s. A good linearly relationship between CTL intensity and the concentration of iso-butanol was observed in the range of 7.6 to 3350 mg/m3 (r = 0.9992), the limit of detection was 2.5 mg/m3. The proposed CTL sensor exhibits good specificity to iso-butanol against other compounds including common alcohols. The possible reaction paths of iso-butanol on the MgO surface were investigated in detail. Results shows that the hydrogen atom abstraction of iso-butanol to form β-Riso following consumption via Waddington mechanism possible is a major reaction channel for CTL emission. The sensor was applied to analyze iso-butanol in spiked samples, satisfactory recoveries were obtained in the range of 96.6 to 112.8% and the RSDs were 5.0 to 10.1%, indicating that the proposed sensor is a promising candidate for rapid analysis of iso-butanol.
关键词： Cataluminescence,Nanosized MgO,Chemiluminescence,Iso-butanol,Sensor
更新于2025-09-23 15:21:21
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Cataluminescence coupled with photo-assisted technology: a highly efficient metal-free gas sensor for carbon monoxide
摘要： With the development of green chemistry, metal-free nano-catalysts have gradually substituted metal-based materials, causing widespread concern among researchers in many fields, especially in cataluminescence sensing, because of their long-term stability, environmental friendliness as well as low costs. Besides the catalysts, the innovations of assistant technologies for cataluminescence are needed to enhance the oxidation reactivity of the gas molecules or catalytic efficiency of sensing materials. Although, there are some groups enhancing the cataluminescence reaction via various assistant technologies, the development of assistant technologies in cataluminescence sensors are still in their infancy, the design, effect mechanism and application are still stimulating challenges. Herein, with photodynamic assistant, fluorinated nanoscale hexagonal boron nitride is first employed as a metal-free catalyst to establish a novel cataluminescence method for detecting CO gases, and the cataluminescence reaction mechanism of CO is also investigated in details. Under the best conditions, the detection limit (3σ) of the CO concentration is 0.005 μg mL-1, which has been largely improved in cataluminescence methods. The realization of detection of CO from theory to practice thorough the method of cataluminescence is beneficial of the practical application of metal-free catalysts to detect CO rather than stay at the possibility to detect CO by the means of theoretical calculation only.
关键词： metal-free gas sensor,carbon monoxide,Cataluminescence,fluorinated hexagonal boron nitride,photo-assisted technology
更新于2025-09-11 14:15:04