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- Title
Enhanced Sensing Performance of Au-decorated Cellulose Nanofiber-SnO<sub>2</sub> for NO<sub>2</sub> Detection Under UV Light.
- Authors
Zhou, Xuebin; Ying, Zhihua; He, Xingxin; Zhang, Chenhan; Zheng, Xiaolong; Zheng, Peng
- Abstract
Cellulose nanofiber (CNF), a natural polymer material with a high specific surface area, is a potential candidate for gas sensors. Here, we report Au/SnO2 composites with excellent performance synthesized by a chemical precipitation method based on CNF-assisted synthesis, and a series of Au/SnO2 composites were prepared by adjusting the Au content. The sensitivity of the 1.5 wt.% Au/SnO2 sensor to a low concentration of 1 ppm NO2 was 53, nearly 17 times higher than that of pure SnO2 synthesized by CNF, under ultraviolet (UV) irradiation at a wavelength of 365 nm. The crystal structure of the composite was characterized by scanning electron microscopy (SEM) and transmission electron microscopy (TEM), revealing that the composites had high crystallinity and particles reaching the nanoscale. Further experimental data showed that the CNF-assisted synthesis Au/SnO2 sensors had good selectivity, repeatability, and stability. Additionally, the sensor is able to maintain its excellent gas sensing performance even under varying humidity conditions.
- Subjects
PRECIPITATION (Chemistry); CELLULOSE; GAS detectors; TRANSMISSION electron microscopy; SCANNING electron microscopy; GOLD clusters; BIOPOLYMERS; IRRADIATION
- Publication
Journal of Electronic Materials, 2023, Vol 52, Issue 9, p5964
- ISSN
0361-5235
- Publication type
Article
- DOI
10.1007/s11664-023-10531-6