3D printed graphene electrodes modified with Prussian blue: Emerging electrochemical sensing platform for peroxide detection.

3D printing technologies have been considered an important technology due to the ease manufacturing of objects, freedom of design, waste minimization and fast prototyping. In chemistry, this technology potentializes the fabrication of conductive electrodes in large-scale for sensing applications. Herein, we reported the modification of 3D printed graphene electrode with Prussian blue. The modified electrode (3DGrE/PB) was characterized by microscopy (SEM and AFM), spectroscopic techniques and its electrochemical properties were compared to the traditional electrodes: glassy carbon, gold, and platinum. The 3DGrE/PB was used in the sensing of hydrogen peroxide in real-world samples of milk and mouthwash and the results obtained according to the technique of batch-injection analysis showed satisfactory for the concentration range typically found in such samples. Thus, 3DGrE/PB can be used as a new platform for sensing of molecular targets.

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