Qihua Liang,Yunjia Guo,Hui Chen,MeiHong Fan,Ni Bai,Xiaoxin Zou,Guo-Dong Li
Although hydrogen sensors with high-response have been extensively studied and developed, it is still a great challenge to achieve ultra-fast response and recovery, high sensitivity and excellent selectivity towards hydrogen (H 2 ) for a gas sensor. Herein, porous Ga-In bimetallic oxide with atomically thin pore wall was synthesized by electrospinning and followed calcination . The sensor based on this sensing material (Ga 1.2 In 0.8 O 3 ) showed ultra-short response and recovery time (≈1 s and 3 s), high response (R a /R g ≈15–500 ppm H 2 ), good reproducibility, remarkable stability, low detection limit (2 ppm) and excellent selectivity (without cross-response to carbon monoxide). The enhanced hydrogen gas sensing performance of this material can be attributed to its novel atomically thin wall, optimal Fermi level and abundant chemisorbed oxygen.
Qian Gao,Saren Ao,Hui Chen,Xiaoxin Zou,Cundi Wei,Guo-Dong Li
IrO 2 -loaded porous foam-like Ga 1.4 In 0.6 O 3 nanofibers with ultrathin pore walls were synthesized via a simple electrospinning and impregnation method for the detection of formaldehyde. This gas sensor based on IrO 2 -loaded Ga 1.4 In 0.6 O 3 nanofibers showed excellent sensitivity and selectivity towards trace formaldehyde. Especially, the response of the gas sensor based on 1% IrO 2 -Ga 1.4 In 0.6 O 3 nanofibers is as high as 46 towards 10 ppm formaldehyde, while it is only 7 for the gas sensor based on Ga 1.4 In 0.6 O 3 . Moreover, the gas sensor based on 1% IrO 2 -Ga 1.4 In 0.6 O 3 exhibited remarkable selectivity towards formaldehyde. The high sensitivity and good selectivity of IrO 2 -loaded porous Ga 1.4 In 0.6 O 3 nanofibers could be attributed to the specific catalytic activity of IrO 2 , the unique composition and the ultrathin structure of Ga 1.4 In 0.6 O 3 .
危险品化学品经营许可证（带存储）