文献类型：期刊文献

英文题名：Electrochemical Determination of Nitrite by Au Nanoparticle/Graphene-Chitosan Modified Electrode

作者：Mo, Rijian[1];Wang, Xuehua[2];Yuan, Qiong[1];Yan, Xiemin[1];Su, Tiantian[1];Feng, Yanting[1];Lv, Lulu[3];Zhou, Chunxia[1,4];Hong, Pengzhi[1,4];Sun, Shengli[3,5];Wang, Zhe[6];Li, Chengyong[1,3,4,5]

机构：[1]Guangdong Ocean Univ, Coll Food Sci & Technol, Zhanjiang 524088, Peoples R China;[2]Wuhan Inst Technol, Sch Mat Sci & Engn, Wuhan 430073, Hubei, Peoples R China;[3]Guangdong Ocean Univ, Sch Chem & Environm, Zhanjiang 524088, Peoples R China;[4]Guangdong Ocean Univ, Shenzhen Inst, Shenzhen 518108, Peoples R China;[5]Guangdong Ocean Univ, Coastal Ecol Engn Technol Res Ctr Zhanjiang City, Zhanjiang 524088, Peoples R China;[6]Chinese Acad Sci, Shenzhen Inst Adv Technol, Ctr Biomed Mat & Interfaces, Shenzhen 518055, Peoples R China

年份：2018

卷号：18

期号：7

外文期刊名：SENSORS

收录：SCI-EXPANDED(收录号：WOS:000441334300008)、、EI(收录号：20182605372783)、Scopus(收录号：2-s2.0-85048976777)、WOS

基金：This work was supported by the National Natural Science Foundation of China (21405024), Science and Technology Planning Project of Guangdong Province (2016A020210114), Science and Technology Planning Project of Zhanjiang City (2016C01002), Science and Technology Planning Project of Shenzhen City (JCYJ20170818111719650) and Industrial Development Special Funds of Dapeng New Area (KY20170209).

语种：英文

外文关键词：nitrite; electrochemical sensor; glassy carbon electrode; graphene; chitosan; Au nanoparticles

外文摘要：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 mu M to 18.9 mu M. The detection limit was estimated to be 0.3 mu M. 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-.