Ultra-Sensitive Amperometric Hydrazine Sensing via Dimethyl Glyoxomat Derived NiO Nanostructures

5 years ago

Ultra-Sensitive Amperometric Hydrazine Sensing via Dimethyl Glyoxomat Derived NiO Nanostructures

Zafar Hussain Ibupoto, Munazza Arain, Syed Tufail Hussain Sherazi, Ayman Nafady, Manzoor Iqbal Khattak, Muhammad Ishaque Abro, Raj Kumar, Syeda Sara Hassan, Tayyaba Shaikh, Abdullah M. Al-Enizi, Sirajuddin

Here we report the synthesis of NiO nanostructures via glyoxomat assisted precipitation protocol using hydrothermal route under the influence of ammonia followed by annealing at 450 oC. These nanostructures were characterized via Scanning Electron Microscopy (SEM) and X-ray Diffraction (XRD) method. The morphological investigation of the finally prepared NiO revealed foam-like porous nanostructures. These NiO nanostructures were immobilized onto glassy carbon electrode (GCE) with nafion as binding material and used as highly sensitive and selective sensor for determining hydrazine in the range of 100–500 nM and 600–1600 nM with a calculated limit of detection (LOD) equal to 5 nM. The as prepared sensor was tested for the presence of various interfering species such as Na+, Cu2+, uric acid, hydrogen peroxide and glucose in the presence of equimolar concentration of hydrazine and negligible interference was noticed. The sensor was further tested for hydrazine detection using square wave voltammetry (SWV) however it only worked in the range of 50–1200 μM. Finally the sensor was successfully implemented for hydrazine determination in real water samples using amperometric protocol.

Publisher URL: http://onlinelibrary.wiley.com/resolve/doi

DOI: 10.1002/elan.201700293