Capacitive Ammonia Sensor Based on Graphene Oxide/Polyaniline Nanocomposites

• DOI: 10.1002/admt.202101247
• Publication Date: 2021-12-16T12:36:17Z
• Authors: Chenggen Wu; Lei Han; Jichao Zhang; Yongqing Wang; Rui Wang; LiJun Chen
• Keywords: Enclosure

Abstract Toxic and irritant gases such as ammonia in enclosure space could destroy the respiratory system with an unobtrusive way. Monitoring high‐risk are imperative when humans expose a vulnerable environment unpredictable gases. Capacitive sensors supposed to be ideal choice applying contactless gas sensing enclosed space. This research develops innovative model based on barrier capacitance theory for capacitive sensor. A sensor graphene oxide/polyaniline (GO/PANI) nanocomposites, which can attached (pipes, storage tanks, etc.), is manufactured exhibits high sensitivity (49.3 × 10 –5 ppm) fast response (≈200 s) concentration range of 0–100 ppm. In particular, GO/PANI nanocomposites modeled capacitance. The described width variation charge region caused by electron injection from adsorbed molecule. Variation trend consistent experimental results. Maximum deviation limited 9.25% ppm between theoretical able accomplish accurate quantitative analysis provides exhilarating enlightenment other sensors.