Ultrasonic-electrodeposition of hierarchical flower-like cobalt on petalage-like graphene hybrid microstructures for hydrazine sensing

Abstract

A facile, one-pot ultrasonic electrochemical method to synthesize hierarchical cobalt (Co)-nanoflowers on petalage-like graphene (GE) was developed. The hybrid microstructures were successfully evaluated as a new material for highly sensitive determination of hydrazine (N(2)H(4)). Scanning electron microscopic measurements displayed that the synthesized Co-GE exhibited a related hierarchical structure of a petalage-like GE homogeneous distribution as a matrix for the growth of smooth nanosheets-assembled Co nanoflowers. Co-GE was confirmed by energy dispersive X-ray spectrograms. Electrochemical methods were adopted to characterize the sensing properties of Co-GE towards the electrocatalytic oxidation of N(2)H(4) at 0.15 V in 0.1 M pH 7.0 sodium phosphate buffered saline. The sensor displayed a broad linearity of 0.25-370 μM and 370 μM to 2.2 mM with a relatively low detection limit of 0.1 μM (S/N = 3) and a response time of less than 3 s. Furthermore, the sensor showed outstanding sensitivity and reproducibility.

Synthesis of Cobalt hexacyanoferrate decorated graphene oxide/carbon nanotubes-COOH hybrid and their application for sensitive detection ofhydrazine

“…The linear ranges and detection limits shown in this work are superior to most of the reported [15,28,[31][32][33][34][35][36][37][38][39][40]. It can be seen that the present method has the comparable sensitivity and detection limit for the hydrazine detection.…”

An electrochemical synthesis strategy for composite based ZnO microspheres–Au nanoparticles on reduced graphene oxide for the sensitive detection of hydrazine in water samples

“…Table 1 shows a comparison of the sensitivity and LOD for the hydrazine sensors based on graphene nanocomposites [31][32][33][34][35][36][37][38] with the values obtained in the present work for RGO/ZnO-Au …”

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

“…Hydrazine standard solutions with different concentrations were added to diluted water samples. Afterwards, they were analyzed by the proposed approach and ultraviolet spectrophotometry method [13,14].…”

“…However, hydrazine is extremely toxic, which has been classified as a human carcinogen in group B2 by the U.S. Environmental Protection Agency [2]. Exposure to hydrazine may cause severe damage to lungs, kidneys, liver, and human central nervous system [3]. Accordingly, the development of a facile and sensitive method for the detection of hydrazine is of great importance.…”