The Effect of Monolayer Graphene on the UV Assisted NO2 Sensing and Recovery at Room Temperature

Proceedings

Chen, Tsung-Cheng¹ 

关键词: graphene;    gas sensor;    recovery;    nitrogen dioxide;    ultraviolet;   

DOI  :  10.3390/proceedings1040461

学科分类：社会科学、人文和艺术（综合）

来源: mdpi

【 摘 要 】

In the present study, UV light induced desorption of nitrogen dioxide (NO2) on pristine graphene based gas sensor is used to improve the sensing performance. Compared to the sample without UV light exposure, the response is 12%, 18% and 21% for NO2 concentrations of 1, 3 and 5 ppm. In addition, the recovery could be speeded up by UV irradiation. The sensor shows good behavior of repeatability when tested for 1 ppm of NO2 in 3 cycles. The graphene sensor with UV irradiation has a higher sensitivity to NO2 than to other gases under higher concentrations.

【 授权许可】

CC BY