海南师范大学学报（自然科学版）2026，Vol.39Issue(1)：20-26,7.DOI:10.12051/j.issn.1674-4942.2026.01.003
基于空心花球状Co3O4的二甲苯气体传感器
Xylene Gas Sensor Based on Hollow Flower-like Co3O4
摘要
Abstract
This study developed a high-performance gas sensor based on hollow flower-like Co3O4 for the detection of xylene.To overcome limitations of conventional p-type metal oxide semiconductors in terms of selectivity,sensitivity,and operating temperatures,this study synthesized a hierarchically porous hollow flower-like Co3O4 gas-sensitive material via a one-step hydrothermal approach,and systematically explored the correlation between its microstructure and gas-sensing performance.Gas-sensing evaluation revealed that the response value of this sensor to 10 mg/L xylene was 1.9 at an optimal operating temperature of 200℃,with a low baseline resistance of 4.4 kΩ.The device exhibited a favorable linear response in the range of 10-100 mg/L,with a detection limit of 10 mg/L.Moreover,the sensor demonstrated excellent repeatability and long-term stability,showing less than 5%response fluctuation over five consecutive testing cycles.Selectivity tests indicated a markedly higher response to xylene compared to common interfering gases such as benzene,toluene,and ethanol,confirming its superior discriminative capability.The superior gas-sensing performance is attributed to its unique hollow flower-like architecture.Its hierarchical porosity provides a large specific surface area for gas interaction,facilitates efficient diffusion,and enhances both surface charge distribution and gas-solid interactions.This work not only provides a structurally controllable and easily fabricated sensor for high-performance xylene detection,but also provides valuable design principles for developing advanced gas-sensitive materials suited for complex environmental monitoring applications.关键词
空心花球状/多孔结构/Co3O4/二甲苯/气体传感器Key words
hollow flower-like/porous structure/Co3O4/xylene/gas sensor分类
化学化工引用本文复制引用
陶永宏,杨浩宇,王庆吉..基于空心花球状Co3O4的二甲苯气体传感器[J].海南师范大学学报（自然科学版）,2026,39(1):20-26,7.基金项目
国家自然科学基金项目(62463003) （62463003）
