Achieving bi-function of enhanced CO2 gas sensing and orange-red light emission of La2O2CO3 1D nanostructures via Eu3+ doping

• Published in: Journal of alloys and compounds Vol. 1010; p. 177641
• Main Authors: Liu, Xiaohan, Shao, Hong, Li, Ning, Li, Dan, Li, Feng, Dong, Xiangting, Zhang, Hongbo
• Format: Journal Article
• Language: English
• Published: Elsevier B.V 05.01.2025
• Subjects: CO2 gas sensor; Electrospinning; Europium; La2O2CO3; Luminescence; One-dimensional nanostructure; Electrospinning; One-dimensional nanostructure; Europium; La2O2CO3; CO2 gas sensor; Luminescence
• ISSN: 0925-8388
• DOI: 10.1016/j.jallcom.2024.177641

Bi-functional nanomaterials with gas sensing and luminescence are more attractive and promising compared with the counterpart single functional nanomaterials, and have become a hotspot subject. Herein, La2O2CO3 and La2O2CO3:Eu3+ one-dimensional (1D) nanostructures including nanofibers, hollow nanofibers and nanobelts are rationally designed and are synthesized by a facile electrospinning via regulating spinning parameters. Excellent bi-functionalities of enhanced CO2 gas sensing and intense orange-red light emission are achieved via Eu3+ doping in 1D La2O2CO3 nanostructures. CO2 sensors based on La2O2CO3:Eu3+ 1D nanostructures display superior selectivity, high response, short response/recovery time and good reproducibility. With respect to response time (2 s) and recovery time (9 s), the La2O2CO3:Eu3+ hollow nanofibers sensor is the best of the presently reported La2O2CO3-based CO2 sensors. The enhanced CO2 sensing mechanism of La2O2CO3:Eu3+ 1D nanostructures can be contributed to the lattice distortion and increase of OH- groups due to Eu3+ doping. Meanwhile, La2O2CO3:Eu3+ 1D nanostructures emit bright orange-red light under 274-nm UV light excitation. The luminescent characteristics are easily adjusted by varying the doping concentrations of Eu3+ ions and changing the morphology of 1D nanostructures. Rationally devised and prepared La2O2CO3:Eu3+ 1D nanostructures with different morphologies can better meet the applications in CO2 gas sensing and rare earth luminescence fields. The preparation strategy of 1D nanostructures is established and the formation mechanism is advanced. The design concepts and fabrication methods established in this work can be extended to prepare other 1D nanostructured materials, promoting the developments of 1D bi-functional nanostructures in the fields of gas sensing and luminescence. [Display omitted] •La2O2CO3 and La2O2CO3:Eu3+ 1D nanostructures are rationally designed and prepared.•CO2 sensing of La2O2CO3 can be enhanced by doping Eu3+ and changing the morphologies.•The enhanced CO2 sensing mechanism of La2O2CO3:Eu3+ 1D nanostructures is advanced.•La2O2CO3:Eu3+ 1D nanostructures emit intense orange-red light upon UV excitation.•Emitting colors of 1D La2O2CO3:Eu3+ are tuned by varying morphology and Eu3+ content.