Sensitive and selective determination of hydrazine using glassy carbon electrode modified with Pd nanoparticles decorated multiwalled carbon nanotubes

Abstract

A glassy carbon electrode modified with palladium nanoparticles decorated multiwalled carbon nanotubes (GCE/nanoPd-MWCNTs) was fabricated. Incorporation of palladium nanoparticles onto the carbon nantube surface by thermal decomposition of palladium acetate led to the fabrication of a sensor with a significant decrease in hydrazine electrooxidation potential. The sensor exhibited low detection limits, high sensitivity and selectivity, rapid response, and good stability toward hydrazine detection.

Enhanced electrochemiluminescence from luminol at multi-walled carbon nanotubes decorated with palladium nanoparticles: A novel route for the fabrication of an oxygen sensor and a glucose biosensor

“…Cyclic voltammograms of a GCE, GCE/MWCNTs and GCE/nanoPd-MWCNTs were recorded in 0.5 M H 2 SO 4 solution at a scan rate of 50 mV s −1 . Cyclic voltammogram of the GCE/nanoPd-MWCNTs showed the characteristic current features of Pd reduction (0.38 V) and Pd oxide formation (0.65 V) [41,42]. Also, the appearance of two peaks at −0.092 and 0.036 V during the scan of potential in positive direction and two peaks at −0.09 and −0.28 V during the scan of potential in negative direction was attributed to the adsorption and desorption of hydrogen atoms at and from the electrode surface, respectively [43].…”

“…Luminol, palladium (II) acetate (47% Pd), sodium hydroxide, dimethylformamide (DMF) were obtained from Merck (Darmstadt, Germany). Multi-walled carbon nanotubes (95% purity, OD = 10-30 nm, ID = 5-10 nm and length = 0.5-500 m) was purchased from Aldrich (Steinheim, Germany Pd-NPs decorated MWCNTs were prepared according to the method reported previously [34] with some modifications [41]. In brief, the treatment of MWCNTs was conducted by refluxing with 70% HNO 3 for 16 h, followed by filtering and thorough washing of the material with deionized water until pH of 7.…”

Voltammetric sensor based on ordered mesoporous carbon for folic acid determination

“…Based on these properties, some applications of OMC have been developed, such as catalyst [4], sensing [5], energy storage, capacitors [6] and so on. Consider that other carbon materials, such as carbon nanotubes [7,8], C 60 [9] and graphene [10], have been used in the electrochemical sensing applications, it is rational for people to consider applying OMC in the design of electrochemical sensors [11,12]. The electrochemical sensors based on OMC have been reported in the determination of various important molecules, such as L-cysteine [5], hydrogen peroxide [13], NADH [3], uric acid [14], morphine [15].…”

A low-cost and label-free assay for hydrazine using MnO2 nanosheets as colorimetric probes

“…Up to now, several methods have been developed for the detection of hydrazine, including chromatography, electrochemistry, chemiluminescence, titrimetry, and colorimetry [4][5][6]. Among these techniques, colorimetric methods are particularly attractive due to their advantages in terms of simplicity, rapidity, reliability, and no requirement of any sophisticated instrumentation.…”