Fabrication of potato-like silver molybdate microstructures for photocatalytic degradation of chronic toxicity ciprofloxacin and highly selective electrochemical detection of H2O2

In the present work, potato-like silver molybdate (Ag 2 MoO 4 ) microstructures were synthesized through a simple hydrothermal method. The microstructures of Ag 2 MoO 4 were characterized by various analytical and spectroscopic techniques such as XRD, FTIR, Raman, SEM, EDX and XPS. Interestingly, the as-prepared Ag 2 MoO 4 showed excellent photocatalytic and electrocatalytic activity for the degradation of ciprofloxacin (CIP) and electrochemical detection of hydrogen peroxide (H 2 O 2 ), respectively. The ultraviolet-visible (UV-Vis) spectroscopy results revealed that the potato-like Ag 2 MoO 4 microstructures could offer a high photocatalytic activity towards the degradation of CIP under UV-light illumination, leads to rapid degradation within 40 min with a degradation rate of above 98%. In addition, the cyclic voltammetry (CV) and amperometry studies were realized that the electrochemical performance of Ag 2 MoO 4 modified electrode toward H 2 O 2 detection. Our H 2 O 2 sensor shows a wide linear range and lower detection limit of 0.04–240 μM and 0.03 μM, respectively. The Ag 2 MoO 4 modified electrode exhibits a high selectivity towards the detection of H 2 O 2 in the presence of different biological interferences. These results suggested that the development of potato-like Ag 2 MoO 4 microstructure could be an efficient photocatalyst as well as electrocatalyst in the potential application of environmental, biomedical and pharmaceutical samples.