Gold Nanoparticles/Zeolitic Imidazolate Framework-67 Modified Carbon Cloth Electrode for Determination of Nitrite
10.19756/j.issn.0253-3820.241217
- VernacularTitle:金纳米颗粒/沸石咪唑酯框架纳米复合材料修饰碳布的制备及电化学检测亚硝酸盐
- Author:
Li-Rong WU
1
;
Ran XIAO
;
Zhen-Jing ZHUANG
Author Information
1. 泉州医学高等专科学校药学院,泉州 362011;华侨大学医学院,泉州 362021
- Keywords:
Carbon cloth;
Gold nanoparticles;
Zeolitic imidazolate framework;
Electrochemistry;
Nitrite sensor
- From:
Chinese Journal of Analytical Chemistry
2024;52(12):1886-1895,中插14-中插17
- CountryChina
- Language:Chinese
-
Abstract:
Excessive nitrite can cause serious harm to human health.In this work,gold nanoparticles/zeolitic imidazolate framework-67(AuNPs/ZIF-67)nanocomposite with three-dimensional structure was designed and synthesized on carbon cloth(CC),and a AuNPs/ZIF-67 modified CC electrode was then prepared for detection of nitrite.The interleaved foliated ZIF-67 nanosheets were synthesized on CC,and then coral-like AuNPs were coated on ZIF-67 modified CC by electrodeposition.The morphology,composition and surface area of AuNPs/ZIF-67/CC were characterized by scanning electron microscopy(SEM),X-ray photoelectron spectroscopy(XPS),X-ray diffraction(XRD)and N2 adsorption-desorption test.The prepared electrode combined the high catalytic performance of AuNPs with the morphology of ZIF-67,significantly increasing the surface area and electrocatalytic activity of the electrode.The oxidation potential of NO2-on AuNPs/ZIF-67/CC electrode decreased significantly,and the oxidation current increased significantly,showing excellent response performance.Cyclic voltammetry(CV)was used to detect NO2-with linear ranges of 0.005-5.0 mmol/L and 5.0-24.0 mmol/L,and limit of detection(LOD,3σ/S)of 1.26 μmol/L.Chronoamperometry(i-t)was also used to detect NO2-,with linear ranges of 1-800 μmol/L and 800-1800 μmol/L,and LOD(3σ/S)of 0.08 μmol/L.In addition,AuNPs/ZIF-67/CC prepared here showed good anti-interference,repeatability and stability,and could be used to detect NO2-in real samples.
