Preparation of electrochemical sensor for detection of cancer medicine doxorubicin based on multi-walled carbon nanotube composites modified electrode

In order to create an electrochemical sensor for doxorubicin (DXB), an effective cancer treatment, multi-walled carbon nanotubes—a modified glassy carbon electrode made of mesoporous silica nanocomposite—were created in this work. Examining the mSiO2@MWCNTs nanocomposite's structure and composition using FTIR, XPS, and SEM revealed the combination of mSiO2 and MWCNTs nanostructure on the modified electrode surface. Studies on the electrochemical determination of DXB utilizing cyclic voltammetry (CV) and differential pulse voltammetry (DPV) methodologies showed that mSiO2@MWCNTs/GCE exhibited excellent sensitivity, selectivity, and precision. MWCNTs and mesoporous silica in the improved electrode work together to improve the sensor's overall performance by enhancing stability and sensitivity in the electrochemical oxidation of DXB. The sensor's linear range was found to be 30–750 μM, with a sensitivity of 0.05123 μA/μM and a detection limit of 14 nM, according to the results. The mSiO2@MWCNTs/GCE shows properties suitable for real sample analysis. The creation of this sensor represents a significant advancement in the field of electrochemical sensors and may open the door to the development of more precise and focused drug detection techniques.