Hydrogen peroxide, a vital component in oxidative reactions during biosynthesis, serves as a crucial defense against bacteria, particularly in urine. Nevertheless, its presence can also indicate severe diseases and disorders, such as asthma or lung cancer. Consequently, the demand for more precise and sensitive materials and techniques to detect hydrogen peroxide is rapidly growing. This study aim to explore the electrochemical sensing capabilities of newly developed copper selenide nanobelts.

Copper selenide was choose an electrocatalyst for the detection of hydrogen peroxide, based on copper study for H₂O₂ detection even in its gaseous form. To synthesize the copper selenide nanobelts, a straightforward solvothermal method was employed, utilizing DETA (Diethylenetriamine) as both a reaction medium and a morphology-directing agent. The reaction was conducted at 180°C for 16 hours to obtain the final product.

Characterization techniques including SEM, TEM, and XRD were employed to confirm the nanobelts' morphology, crystallinity, and purity. Encouragingly, the copper selenide nanobelts exhibited excellent sensitivity in detecting hydrogen peroxide in an electrolyte solution consisting of 0.1M KOH and 0.25% PAA. The sensing application of copper selenide was studied across a range of hydrogen peroxide concentrations, from 0.03 to 1 mmol, demonstrating a highly linear response with impressively low limits of detection (LOD) and quantification (LOQ) values.

This research sheds light on the significant role of copper selenide nanobelts for precise and sensitive detection, paving the way for advancements in diagnosing and monitoring various diseases and disorders associated with hydrogen peroxide levels.