The transient photocurrent response was recorded for both SO-CdS and Pristine CdS nanorods. When subjected to an on/off sequence of visible light irradiation, Spinacia oleracea-CdS exhibited a greater transient photocurrent response than pure CdS (Figure ). To examine the charge carrier transport behaviour, SO-CdS electrochemical impedance spectroscopy was performed (Figure -IV). Additionally, the Nyquist plot of SO-CdS, which was generated from EIS data, had a smaller curvature radius than the Pristine CdS, indicating that the photocatalyst with electrically conductive carbon had a lower impedance (Figure -IV). Charge transfer resistance is shown by the small frequency intercept on the real axis. A smaller arc radius in SO-CdS -CdS suggests a reduced charge transfer resistance. At solid-solid contacts, reduced charge resistance indicates enhanced electron transmission (SO-CdS). Improved photocatalytic activity is the result of both enhanced charge transfers and decreased photogenerated electron-hole pair recombination, which quickens the rate of reaction at the solid-liquid interface .