Self-passivated CuV2O6 as a universal photoelectrode material for reliable and accurate photoelectrochemical sensing

Abstract

Photoelectrochemical (PEC) detection has attracted intensive attention during the past decade. Currently, most research focuses on improving the sensitivity and selectivity of the PEC sensor, but the issue of the stability of the photoelectrode material under the testing environment is often ignored or lacks in-depth investigation. Herein, we develop a novel CuV₂O₆ photoelectrode exhibiting superior stability under the testing environment through self-passivation. CuV₂O₆-based PEC sensors are fabricated for the first time for highly selective carcinoembryonic antigen (CEA) and human serum alpha fetoprotein (AFP) detection. The CuV₂O₆ shows great potential as a universal photoelectrode material for reliable and accurate PEC detection of macromolecules.