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A novel non-enzyme hydrogen peroxide sensor based on an electrode modified with carbon nanotube-wired CuO nanoflowers |
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| Authors: | Keying Zhang Na Zhang Hong Cai Cong Wang |
| Institution: | 1. Anhui Key Laboratory of Spin Electron and Nanomaterials (Cultivating Base); Department of Chemistry-Biology, Suzhou University, Suzhou, Anhui, 234000, People’s Republic of China 2. Department of Physical Education, Suzhou University, Suzhou, Anhui, 234000, People’s Republic of China |
| Abstract: | We have prepared a novel sensor for hydrogen peroxide that is based on a glassy carbon electrode modified with a film containing multi-walled carbon nanotubes wired to CuO nanoflowers. The nanoflowers were characterized by X-ray powder diffraction, and the electrode was characterized by cyclic voltammetry (CV) and scanning electron microscopy. The response of the modified electrode towards hydrogen peroxide was investigated by CV and chronoamperometry and showed it to exhibit high electrocatalytic activity, with a linear range from 0.5?μM to 82?μM and a detection limit of 0.16?μM. The sensor also displays excellent selectivity and stability. We have prepared a novel sensor for hydrogen peroxide (H2O2) that is based on a glassy carbon electrode modified with a film containing multi-walled carbon nanotubes (MWCNTs) wired to CuO nanoflowers. The scheme shows the construction of the MWCNTs-wired CuO nanoflowers modified electrode and electrocatalytic activity towards H2O2. When H2O2 was added, the cathodic peak current of the CuO-MWCNTs/GCE remarkably increased while its anodic peak current obviously decreased. By increasing the concentration of H2O2, the cathodic peak current further increased while its anodic peak current further decreased. Indicating CuO-MWCNTs/GCE has a remarkable electrocatalytic activity for H2O2. The scheme. The construction of the MWCNTs-wired CuO nanoflowers modified electrode and electrocatalytic activity towards H2O2 |
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