A chitosan/amido-graphene oxide-based self-powered humidity sensor enabled by triboelectric effect

• 作者: Bo-Hao Liu Guang-Zhong Xie Cheng-Zhen Li Si Wang Zhen Yuan Zai-Hua Duan Ya-Dong Jiang Hui-Ling Tai
• 来源期刊: 稀有金属（英文版）
• 年，卷（期）: 2021,（8）
• 所属期刊栏目: ORIGINAL ARTICLES
• 页码范围: 1995-2003
• 页数: 9页
• 语种: 英文

摘要

In this work,amido-graphene oxide (GO-NH2)loaded chitosan (CTS) composite material (CTS/GO-NH2)that acts as both the triboelectric and sensing film was prepared on rotary fan-shaped triboelectric nanogenerator for humidity detection.Compared with the pristine CTS-based triboelectric humidity sensor (CTS-THS) and GO-NH2-THS,the CTS/GO-NH2-based humidity sensor exhibited higher humidity response and better linearity in the relative humidity (RH) range of 18.7％RH-91.5％RH.The above results can be explained by the massive exposed and less concealed hydrophilic functional groups of CTS with the help of the wrinkle structure of GO-NH2.Mean-while,the CTS/GO-NH2-THS possessed good repeatability and acceptable hysteresis (～ 6.2％RH).Finally,a humid-ity sensing mechanism coupling triboelectric contact charging effect with electrons transfer principle under moisture environment was established to interpret the enhanced humidity sensing performance of the composite film-based THS.This work demonstrates that CTS/GO-NH2 composite film can be utilized to fabricate humidity sensors based on the triboelectric effect.