TY - JOUR
T1 - Green Synthesis of 3D Chemically Functionalized Graphene Hydrogel for High-Performance NH3 and NO2 Detection at Room Temperature
AU - Wu, Jin
AU - Wei, Yaoming
AU - Ding, Haojun
AU - Wu, Zixuan
AU - Yang, Xing
AU - Li, Zhenyi
AU - Huang, Wenxi
AU - Xie, Xi
AU - Tao, Kai
AU - Wang, Xiaotian
N1 - Publisher Copyright:
© 2020 American Chemical Society.
PY - 2020/5/6
Y1 - 2020/5/6
N2 - To address the low gas sensitivity of pristine graphene (Gr), chemical modification of Gr has been proved as a promising route. However, the existing chemical functionalization method imposes the utilization of toxic chemicals, increasing the safety risk. Herein, vitamin C (VC)-modified reduced graphene hydrogel (V-RGOH) is synthesized via a green and facile self-assembly process with the assistance of biocompatible VC molecules for high-performance NH3 and NO2 detection. The three-dimensional (3D) structured V-RGOH is highly sensitive to low-concentration NH3 and NO2 at room temperature. In comparison with those of the unmodified RGOH, the V-RGOH gas sensors display an order of magnitude higher sensitivity and much lower limit of detection, resulting from the enhanced interaction between VC and analytes. NH3 and NO2 with extremely low concentrations of 500 and 100 ppb are detected experimentally. Notably, imbedded microheaters are exploited to explore the temperature-dependent gas sensing properties, revealing the negative and positive impacts of temperature on the sensitivity and recovery speed, respectively. Notably, the V-RGOH sensor exhibits remarkable selectivity and linearity and a wide detection range. This work reveals the remarkable effects of chemical modification with biodegradable molecules and 3D structure design on improving the gas sensing performance of the Gr material.
AB - To address the low gas sensitivity of pristine graphene (Gr), chemical modification of Gr has been proved as a promising route. However, the existing chemical functionalization method imposes the utilization of toxic chemicals, increasing the safety risk. Herein, vitamin C (VC)-modified reduced graphene hydrogel (V-RGOH) is synthesized via a green and facile self-assembly process with the assistance of biocompatible VC molecules for high-performance NH3 and NO2 detection. The three-dimensional (3D) structured V-RGOH is highly sensitive to low-concentration NH3 and NO2 at room temperature. In comparison with those of the unmodified RGOH, the V-RGOH gas sensors display an order of magnitude higher sensitivity and much lower limit of detection, resulting from the enhanced interaction between VC and analytes. NH3 and NO2 with extremely low concentrations of 500 and 100 ppb are detected experimentally. Notably, imbedded microheaters are exploited to explore the temperature-dependent gas sensing properties, revealing the negative and positive impacts of temperature on the sensitivity and recovery speed, respectively. Notably, the V-RGOH sensor exhibits remarkable selectivity and linearity and a wide detection range. This work reveals the remarkable effects of chemical modification with biodegradable molecules and 3D structure design on improving the gas sensing performance of the Gr material.
KW - 3D structure
KW - ammonia sensing
KW - chemical modified graphene hydrogel
KW - green synthesis
KW - NO sensing
UR - http://www.scopus.com/inward/record.url?scp=85083744306&partnerID=8YFLogxK
U2 - 10.1021/acsami.0c00578
DO - 10.1021/acsami.0c00578
M3 - 文章
C2 - 32297738
AN - SCOPUS:85083744306
SN - 1944-8244
VL - 12
SP - 20623
EP - 20632
JO - ACS Applied Materials and Interfaces
JF - ACS Applied Materials and Interfaces
IS - 18
ER -