Enhanced sensitivity of self-powered NO2 gas sensor to sub-ppb level using triboelectric effect based on surface-modified PDMS and 3D-graphene/CNT network

被引：41

作者：

Hoang Si Hong ^{[1
]}

Nguyen Hai Ha ^{[1
]}

Dao Duc Thinh ^{[1
]}

Nguyen Hoang Nam ^{[1
]}

Nguyen Thanh Huong ^{[1
]}

Nguyen Thi Hue ^{[1
]}

Tran Vinh Hoang ^{[2
]}

机构：

[1] Hanoi Univ Sci & Technol HUST, Sch Elect Engn, 1 Dai Co Viet Rd, Hanoi, Vietnam

[2] Hanoi Univ Sci & Technol HUST, Sch Chem Engn, 1 Dai Co Viet Rd, Hanoi, Vietnam

来源：

NANO ENERGY | 2021年 / 87卷

关键词：

Self-powered gas sensor; Triboelectric effect; Graphene; 3D-graphene; CNT; PDMS; Low detection limit; NANOGENERATORS;

D O I：

10.1016/j.nanoen.2021.106165

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

Self-powered contact electrification based flexible NO2 gas sensor has been investigated by a simple and cost-effective energy generation method at room temperature. After contact vertically surface-modified polydimethylsiloxane (PDMS) to graphene or 3D-graphene/CNT network; result mechanical energy converts into electrical energy. In relative humidity environment of 40-45%, the peak-to peak open circuit voltage were around 6.2 V and 25.4 V for graphene and 3D-graphene/CNT sample, respectively. Then a series of very-low NO2 gas concentration at ppb level systematically controlled generated-voltage at output of self-powered sensor. Thanks to larger area contact, high-efficient triboelectric effects between 3D-graphene/CNT and surface-modified PMDS, the self-powered NO2 gas sensor showed promising results in terms of high sensitivity, mechanical robust, stability and linearity. The output voltage and sensor response of 3D-graphene/CNT obtained approximately 23.1 V and 9.1% at 10 ppb NO2. The effects of humidity on sensor response and selectivity of fabricated sensor were also investigated. The works therefore stimulate practicability and innovative approach for triboelectric nanogenerator based self-powered system towards gas sensing applications.

引用

页数：8