The organic pigment Chlorophyll (Chl), while hybridized with the semiconductor (CdS) acts as a photosensitizer; Chl-CdS acts as a nanohybrid photocatalyst for hydrogen generation and the carbonaceous biomass of SO acts as a substrate for photoreforming . Many attempts have been made to handle vegetable waste, such as composting and conversion to liquid or gaseous forms of biofuels, but photoreforming of Spinacia oleracea waste for enhanced solar hydrogen production has considerable environmental (waste to energy) as well as economic potential . The SO fine powder was integrated with semiconductor CdS using a one-step hydrothermal approach to form Spinacia oleracea-CdS (SO-CdS) nanohybrid. Chlorophyll (Chl) is isolated from SO powder, hybridized with CdS, and used as a photocatalyst [Chlorophyll-CdS (Chl-CdS)] for water splitting (without biomass) to reveal its distinct role.