Search

Your search keyword '"Qian, Libing"' showing total 123 results
Start Over Author "Qian, Libing"
123 results on '"Qian, Libing"'

30. A heterojunction composite of Bi2Se3 nanosheets and MoO3 nanobelts for a high-performance triethylamine sensor.

Author

Tan, Xiangyun, Wang, Li, Chen, Xi, Zhang, Haoliang, Chen, Si, Qian, Libing, Chen, Zhiyuan, and He, Chunqing

Abstract

The combination of metal oxides and 2D nanomaterials demonstrated remarkable enhancement in gas sensing performance. In this work, a heterojunction composite of 2D Bi2Se3 nanosheets and 1D MoO3 nanobelts was first synthesized by a simple and low-cost strategy. Significantly, the Bi2Se3/MoO3-2 composite with a mass ratio of 2 : 1 for MoO3 to Bi2Se3 exhibited a pronounced response of 151 to 10 ppm TEA at 240 °C, which was five times higher than that of MoO3. Moreover, the sensor showed excellent selectivity to triethylamine (TEA), long-term stability (96% response retention after 30 days), and a low detection limit of ∼5.5 ppb. The enhanced TEA sensing performance can be attributed to the formation of the n–n heterojunction between Bi2Se3 and MoO3, which provides more active sites for the reaction of TEA molecules and improves the electron carrier transfer from Bi2Se3 to MoO3. This work demonstrates the potential of the Bi2Se3 nanosheet and MoO3 nanobelt composite as an ultrasensitive sensor for TEA detection. [ABSTRACT FROM AUTHOR]

Published
2023
Full Text
View/download PDF

31. Designing novel monolayer and multilayer h-CSe crystals with tunable photoelectric properties.

Author

Dong, Xiumei, Mao, Caixia, Qian, Libing, Hu, Yonghong, Xue, Li, and Huang, Haiming

Abstract

Using the first-principles method, a new structure of monolayer h-CSe was predicted, exhibiting good dynamical and thermal stability. The geometrical, electronic and optical properties of monolayer h-CSe are examined at the HSE level. Furthermore, the influences of the in-plane strain and layer number on the electric properties of the two dimensional h-CSe material are studied. The results indicate that it possesses an indirect band gap, which exhibits a rich variety of behaviors depending on the small in-plane biaxial strain. The band gap of monolayer h-CSe could be easily tuned in the energy range from 0.82 eV to 2.61 eV under small in-plane biaxial strain (from −3% to 3%). Also, a band gap transition between direct and indirect types is not found. The band gap of the h-CSe materials decreases with the increase of their layer number. In addition, it was found that these h-CSe materials show excellent optical properties, including strong light harvesting ability for the ultra-violet light range of the solar spectrum. The results obtained here indicate that monolayer h-CSe may have significant potential applications in future nanoelectronic fields. [ABSTRACT FROM AUTHOR]

Published
2023
Full Text
View/download PDF

Catalog

Books, media, physical & digital resources
See catalog results