Lanthanum oxycarbonate with nanosheet-like network structure for cataluminescence sensing of tetrahydrofuran

作者：Wu, Yanjun; Lin, Zhicong; Chen, Na; Wang, Jingxin^*; Zhang, Runkun^*

来源：Microchemical Journal, 2022, 181: 107710.

DOI：10.1016/j.microc.2022.107710

• Cataluminescence
• Lanthanum oxycarbonate
• Tetrahydrofuran
• Gas sensor

In the present work, Lanthanum oxycarbonate (La2O2CO3) nanosheets with network structure were synthesized by a simple precipitation method and their performances as cataluminescence (CTL) sensor for tetrahydrofuran (THF) were investigated. The structure, morphology and chemical states of as-prepared La2O2CO3 were characterized by X-ray diffraction, scanning electron microscopy, transmission electron microscopy and X-ray photoelectron spectroscopy. The sensing conditions include working temperature, detection wavelength and the flow rate of carrier gas were optimized. Under the optimal conditions, the sensor shows high sensitive and selective response to THF. The linear range of CTL intensity versus tetrahydrofuran concentration is 59-870 mg m(-3) (R-2 = 0.9933) with a limit of detection of 18 mg m(-3) (the signal to noise is 3). In order to demonstrate the potential application, the sensor was applied to measure real air samples contain THF, and the obtained results were consistent with those measured by gas chromatography method. The possible sensing mechanism was also discussed based on the reaction product from the catalytic oxidation of THF on La2O2CO3 surface. Compared with the previous CTL sensor for THF, the present senor shows better specificity, and has a lower working temperature. The present work provides a promising method for rapid detection of THF in concerning locations, such as in residential buildings and in the manufacturing plants.

• 单位
  广东药学院