Final published version
Research output: Contribution to Journal/Magazine › Journal article › peer-review
Research output: Contribution to Journal/Magazine › Journal article › peer-review
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TY - JOUR
T1 - Determination of nitrite on manganese dioxide doped reduced graphene oxide modified glassy carbon by differential pulse voltammetry
AU - Yılmaz-Alhan, Betül
AU - Çelik, Gamze
AU - Oguzhan Caglayan, M.
AU - Şahin, Samet
AU - Üstündağ, Zafer
PY - 2022/8/31
Y1 - 2022/8/31
N2 - A transition metal oxide, MnO2, doped reduced graphene oxide (rGO) was prepared to develop a 2D-carbon-metal oxide composite modified glassy carbon electrode (GC) for sensitive electrochemical determination of nitrite ion (NO2−). GO was first synthesized and reduced to rGO followed by a MnO2 doping process. The obtained MnO2-rGO composite was then characterized with Raman spectroscopy, infrared spectroscopy, and scanning electron microscopy techniques. The MnO2-rGO coated on GC electrodes were electrochemically characterized using cyclic voltammetry, electrochemical impedance spectroscopy and optimized for the determination of NO2− using differential pulse voltammetry. A linear calibration curve was obtained between 0.1 and 5.5 μM with LOD and LOQ values of 0.02 μM and 0.06 μM, respectively. The selectivity of the proposed sensor was tested in different substances and no significant interference was found. The sensor validation test showed that the precision (% RSD) and accuracy of the system were around 1.95–2.73% and (− 3.5)–2.5%, respectively. Finally, real sample tests with commercially available juice samples and tap water confirmed that the method could detect the spiked NO2− in real samples. As a result, the sensitive and easy determination of NO2− has been achieved using MnO2-rGO composite materials in real samples with good recovery values and minimum interference.
AB - A transition metal oxide, MnO2, doped reduced graphene oxide (rGO) was prepared to develop a 2D-carbon-metal oxide composite modified glassy carbon electrode (GC) for sensitive electrochemical determination of nitrite ion (NO2−). GO was first synthesized and reduced to rGO followed by a MnO2 doping process. The obtained MnO2-rGO composite was then characterized with Raman spectroscopy, infrared spectroscopy, and scanning electron microscopy techniques. The MnO2-rGO coated on GC electrodes were electrochemically characterized using cyclic voltammetry, electrochemical impedance spectroscopy and optimized for the determination of NO2− using differential pulse voltammetry. A linear calibration curve was obtained between 0.1 and 5.5 μM with LOD and LOQ values of 0.02 μM and 0.06 μM, respectively. The selectivity of the proposed sensor was tested in different substances and no significant interference was found. The sensor validation test showed that the precision (% RSD) and accuracy of the system were around 1.95–2.73% and (− 3.5)–2.5%, respectively. Finally, real sample tests with commercially available juice samples and tap water confirmed that the method could detect the spiked NO2− in real samples. As a result, the sensitive and easy determination of NO2− has been achieved using MnO2-rGO composite materials in real samples with good recovery values and minimum interference.
KW - Differential pulse voltammetry
KW - MnO doped reduced graphene oxide
KW - Nitrite analysis
KW - Sensors
U2 - 10.1007/s11696-022-02218-9
DO - 10.1007/s11696-022-02218-9
M3 - Journal article
AN - SCOPUS:85128678803
VL - 76
SP - 4919
EP - 4925
JO - Chemical Papers
JF - Chemical Papers
SN - 0366-6352
IS - 8
ER -