Simple and ultrasensitive self-supporting electrochemical sensor for nitrite based on cobalt oxide grafted carbon cloth
Jingwen Zhang, Bangning Sun, Xu Zhang, Jie Gao, Liang Zhang, Chun Zhao, Hui Suo, Chun Zhao, Hui Suo
Abstract
In this work, a simple and ultrasensitive self-supporting electrochemical sensor for nitrite based on Co 3 O 4 decorated carbon cloth has been efficiently fabricated by using a facile one-pot hydrothermal approach. Due to the benefits of high conductivity, large electroactive specific surface area , fast electron transfer kinetics and superior electrocatalytic activity , the Co 3 O 4 /CC electrode has exhibited outstanding nitrite sensing performance, including broad detection ranges 1–4000 μM in three divisions with a detection limit of 0.12 μM (S/N = 3), the fast response time of 0.7 s and high sensitivity. Additionally, nitrite in drinking water and pickled cabbage was successfully measured with high recoveries using the Co 3 O 4 /CC electrode.