Electrochemical Determination of Nitrite by Au Nanoparticle/Graphene-Chitosan Modified Electrode
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 th...
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MDPI AG
2018-06-01
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| Series: | Sensors |
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| Online Access: | http://www.mdpi.com/1424-8220/18/7/1986 |
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| author | Rijian Mo Xuehua Wang Qiong Yuan Xiemin Yan Tiantian Su Yanting Feng Lulu Lv Chunxia Zhou Pengzhi Hong Shengli Sun Zhe Wang Chengyong Li |
| author_facet | Rijian Mo Xuehua Wang Qiong Yuan Xiemin Yan Tiantian Su Yanting Feng Lulu Lv Chunxia Zhou Pengzhi Hong Shengli Sun Zhe Wang Chengyong Li |
| author_sort | Rijian Mo |
| collection | DOAJ |
| description | 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−. |
| first_indexed | 2024-04-13T07:18:53Z |
| format | Article |
| id | doaj.art-5ac4980a41514b919b42c18eebd770dd |
| institution | Directory Open Access Journal |
| issn | 1424-8220 |
| language | English |
| last_indexed | 2024-04-13T07:18:53Z |
| publishDate | 2018-06-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Sensors |
| spelling | doaj.art-5ac4980a41514b919b42c18eebd770dd2022-12-22T02:56:41ZengMDPI AGSensors1424-82202018-06-01187198610.3390/s18071986s18071986Electrochemical Determination of Nitrite by Au Nanoparticle/Graphene-Chitosan Modified ElectrodeRijian Mo0Xuehua Wang1Qiong Yuan2Xiemin Yan3Tiantian Su4Yanting Feng5Lulu Lv6Chunxia Zhou7Pengzhi Hong8Shengli Sun9Zhe Wang10Chengyong Li11College of Food Science and Technology, Guangdong Ocean University, Zhanjiang 524088, ChinaSchool of Materials Science and Engineering, Wuhan Institute of Technology, Wuhan 430073, ChinaCollege of Food Science and Technology, Guangdong Ocean University, Zhanjiang 524088, ChinaCollege of Food Science and Technology, Guangdong Ocean University, Zhanjiang 524088, ChinaCollege of Food Science and Technology, Guangdong Ocean University, Zhanjiang 524088, ChinaCollege of Food Science and Technology, Guangdong Ocean University, Zhanjiang 524088, ChinaSchool of Chemistry and Environment, Guangdong Ocean University, Zhanjiang 524088, ChinaCollege of Food Science and Technology, Guangdong Ocean University, Zhanjiang 524088, ChinaCollege of Food Science and Technology, Guangdong Ocean University, Zhanjiang 524088, ChinaSchool of Chemistry and Environment, Guangdong Ocean University, Zhanjiang 524088, ChinaCenter for Biomedical Materials and Interfaces, Shenzhen Institutes of Advanced Technology, Chinese Academy of Sciences, Shenzhen 518055, ChinaCollege of Food Science and Technology, Guangdong Ocean University, Zhanjiang 524088, ChinaA 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−.http://www.mdpi.com/1424-8220/18/7/1986nitriteelectrochemical sensorglassy carbon electrodegraphenechitosanAu nanoparticles |
| spellingShingle | Rijian Mo Xuehua Wang Qiong Yuan Xiemin Yan Tiantian Su Yanting Feng Lulu Lv Chunxia Zhou Pengzhi Hong Shengli Sun Zhe Wang Chengyong Li Electrochemical Determination of Nitrite by Au Nanoparticle/Graphene-Chitosan Modified Electrode Sensors nitrite electrochemical sensor glassy carbon electrode graphene chitosan Au nanoparticles |
| title | Electrochemical Determination of Nitrite by Au Nanoparticle/Graphene-Chitosan Modified Electrode |
| title_full | Electrochemical Determination of Nitrite by Au Nanoparticle/Graphene-Chitosan Modified Electrode |
| title_fullStr | Electrochemical Determination of Nitrite by Au Nanoparticle/Graphene-Chitosan Modified Electrode |
| title_full_unstemmed | Electrochemical Determination of Nitrite by Au Nanoparticle/Graphene-Chitosan Modified Electrode |
| title_short | Electrochemical Determination of Nitrite by Au Nanoparticle/Graphene-Chitosan Modified Electrode |
| title_sort | electrochemical determination of nitrite by au nanoparticle graphene chitosan modified electrode |
| topic | nitrite electrochemical sensor glassy carbon electrode graphene chitosan Au nanoparticles |
| url | http://www.mdpi.com/1424-8220/18/7/1986 |
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