Limits...
Fabrication of potato-like silver molybdate microstructures for photocatalytic degradation of chronic toxicity ciprofloxacin and highly selective electrochemical detection of H 2 O 2

View Article: PubMed Central - PubMed

ABSTRACT

In the present work, potato-like silver molybdate (Ag2MoO4) microstructures were synthesized through a simple hydrothermal method. The microstructures of Ag2MoO4 were characterized by various analytical and spectroscopic techniques such as XRD, FTIR, Raman, SEM, EDX and XPS. Interestingly, the as-prepared Ag2MoO4 showed excellent photocatalytic and electrocatalytic activity for the degradation of ciprofloxacin (CIP) and electrochemical detection of hydrogen peroxide (H2O2), respectively. The ultraviolet-visible (UV-Vis) spectroscopy results revealed that the potato-like Ag2MoO4 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 Ag2MoO4 modified electrode toward H2O2 detection. Our H2O2 sensor shows a wide linear range and lower detection limit of 0.04–240 μM and 0.03 μM, respectively. The Ag2MoO4 modified electrode exhibits a high selectivity towards the detection of H2O2 in the presence of different biological interferences. These results suggested that the development of potato-like Ag2MoO4 microstructure could be an efficient photocatalyst as well as electrocatalyst in the potential application of environmental, biomedical and pharmaceutical samples.

No MeSH data available.


(A) Cyclic voltammograms of Ag2MoO4 modified electrode in 200 μM H2O2 containing N2 saturated 0.05 M PBS (pH 7) at different scan rates from 20 to 200 mV/s (a–j) and (B) Corresponding calibration plot of scan rate vs. Ipc of H2O2.
© Copyright Policy - open-access
Related In: Results  -  Collection

License
getmorefigures.php?uid=PMC5037444&req=5

f9: (A) Cyclic voltammograms of Ag2MoO4 modified electrode in 200 μM H2O2 containing N2 saturated 0.05 M PBS (pH 7) at different scan rates from 20 to 200 mV/s (a–j) and (B) Corresponding calibration plot of scan rate vs. Ipc of H2O2.

Mentions: Furthermore, the electrocatalytic behavior of the Ag2MoO4 modified GCE towards H2O2 was studied with the change of scan rate. Figure 9A reveals the CVs responses of 200 μM of H2O2 detection at Ag2MoO4/GCE with different scan rate ranges from 20 to 200 mV/s and its denoted (a–j). When increasing the scan rate from 20 to 200 mV/s, the reduction peak current of H2O2 was increased and the peak potential was shifted towards the more negative side. The peak current of H2O2 reduction is directly proportional to the scan rate (Fig. 9B) (Correlation co-efficient R2 = 0.998), indicating that the electrode process is surface controlled process61.


Fabrication of potato-like silver molybdate microstructures for photocatalytic degradation of chronic toxicity ciprofloxacin and highly selective electrochemical detection of H 2 O 2
(A) Cyclic voltammograms of Ag2MoO4 modified electrode in 200 μM H2O2 containing N2 saturated 0.05 M PBS (pH 7) at different scan rates from 20 to 200 mV/s (a–j) and (B) Corresponding calibration plot of scan rate vs. Ipc of H2O2.
© Copyright Policy - open-access
Related In: Results  -  Collection

License
Show All Figures
getmorefigures.php?uid=PMC5037444&req=5

f9: (A) Cyclic voltammograms of Ag2MoO4 modified electrode in 200 μM H2O2 containing N2 saturated 0.05 M PBS (pH 7) at different scan rates from 20 to 200 mV/s (a–j) and (B) Corresponding calibration plot of scan rate vs. Ipc of H2O2.
Mentions: Furthermore, the electrocatalytic behavior of the Ag2MoO4 modified GCE towards H2O2 was studied with the change of scan rate. Figure 9A reveals the CVs responses of 200 μM of H2O2 detection at Ag2MoO4/GCE with different scan rate ranges from 20 to 200 mV/s and its denoted (a–j). When increasing the scan rate from 20 to 200 mV/s, the reduction peak current of H2O2 was increased and the peak potential was shifted towards the more negative side. The peak current of H2O2 reduction is directly proportional to the scan rate (Fig. 9B) (Correlation co-efficient R2 = 0.998), indicating that the electrode process is surface controlled process61.

View Article: PubMed Central - PubMed

ABSTRACT

In the present work, potato-like silver molybdate (Ag2MoO4) microstructures were synthesized through a simple hydrothermal method. The microstructures of Ag2MoO4 were characterized by various analytical and spectroscopic techniques such as XRD, FTIR, Raman, SEM, EDX and XPS. Interestingly, the as-prepared Ag2MoO4 showed excellent photocatalytic and electrocatalytic activity for the degradation of ciprofloxacin (CIP) and electrochemical detection of hydrogen peroxide (H2O2), respectively. The ultraviolet-visible (UV-Vis) spectroscopy results revealed that the potato-like Ag2MoO4 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 Ag2MoO4 modified electrode toward H2O2 detection. Our H2O2 sensor shows a wide linear range and lower detection limit of 0.04–240 μM and 0.03 μM, respectively. The Ag2MoO4 modified electrode exhibits a high selectivity towards the detection of H2O2 in the presence of different biological interferences. These results suggested that the development of potato-like Ag2MoO4 microstructure could be an efficient photocatalyst as well as electrocatalyst in the potential application of environmental, biomedical and pharmaceutical samples.

No MeSH data available.