Multifunctional CdS/MoS₂-GO nanocomposite for enhanced electrochemical dopamine sensing and photocatalytic remediation

This study investigates the development of a multifunctional CdS/MoS₂-GO nanocomposite for advanced water treatment and electrochemical sensing applications. The thorough analysis employing methods like XRD, FESEM, TEM, UV–Vis, EDX, and XPS validated the effective incorporation and cooperative interaction of the components within the nanomaterial. The composite exhibited superior electrochemical and photocatalytic performance, surpassing that of its components. The modified glassy carbon electrode, tailored for dopamine detection at neutral pH, demonstrated remarkable sensitivity, attaining a low detection limit of 0.003 μM through differential pulse voltammetry. In photocatalytic assessments, the composite demonstrated significant degradation of methyl orange and malachite green when exposed to visible light, which can be ascribed to enhanced charge separation and an advantageous band structure. The material demonstrated notable stability, selectivity, and compatibility with environmental standards. The findings highlight the promising capabilities of the CdS/MoS₂-GO composite for real-world applications in electrochemical sensing and wastewater remediation.