My watch list
my.chemeurope.com  
Login  

Sensors, Vol. 18, Pages 1986: Electrochemical Determination of Nitrite by Au Nanoparticle/Graphene-Chitosan Modified Electrode

Sensors, Vol. 18, Pages 1986: Electrochemical Determination of Nitrite by Au Nanoparticle/Graphene-Chitosan Modified Electrode

Sensors doi: 10.3390/s18071986

Authors: Rijian Mo Xuehua Wang Qiong Yuan Xiemin Yan Tiantian Su Yanting Feng Lulu Lv Chunxia Zhou Pengzhi Hong Shengli Sun Zhe Wang Chengyong Li

A highly sensitive nitrite (NO2−) electrochemical sensor is fabricated using glassy carbon electrode modified with Au nanoparticle and grapheme oxide. Briefly, this electrochemical sensor was prepared by drop-coating graphene oxide-chitosan mixed film on the surface of the electrode and then electrodepositing a layer of Au nanoparticle using cyclic voltammetry. The electrochemical behavior of NO2− on the sensor was investigated by cyclic voltammetry and amperometric i-t curve. The results showed that the sensor exhibited better electrocatalytic activity for NO2− in 0.1 mol/L phosphate buffer solution (PBS) (pH 5.0). The oxidation peak current was positively correlated with NO2− concentration in the ranges of 0.9 µM to 18.9 µM. The detection limit was estimated to be 0.3 µM. In addition, the interference of some common ions (e.g., NO3−, CO32−, SO42−, Cl−, Ca2+ and Mg2+) and oxidizable compound including sodium sulfite and ascorbic acid in the detection of nitrite was also studied. The results show that this sensor is more sensitive and selective to NO2−. Therefore, this electrochemical sensor provided an effective tool for the detection of NO2−.

Authors:   Mo, Rijian ; Wang, Xuehua ; Yuan, Qiong ; Yan, Xiemin ; Su, Tiantian ; Feng, Yanting ; Lv, Lulu ; Zhou, Chunxia ; Hong, Pengzhi ; Sun, Shengli ; Wang, Zhe ; Li, Chengyong
Journal:   Sensors
Volume:   18
edition:   7
Year:   2018
Pages:   1986
DOI:   10.3390/s18071986
Publication date:   21-Jun-2018
Facts, background information, dossiers
More about Molecular Diversity Preservation International
Your browser is not current. Microsoft Internet Explorer 6.0 does not support some functions on Chemie.DE