This paper reports the mediator-free direct Z-Scheme photoelectrocatalytic water splitting using bismuth vanadate interleaved graphitic carbon nitride nanohybrid materials. The g-C3N4-BiVO4 nanohybrid materials with different wt. % of g-C3N4 were successfully synthesized by hydrothermal method. The g-C3N4-BiVO4 photoanode with 10 wt. % of g-C3N4 exhibited higher photoelectrocatalytic activity towards water splitting, which was 1.6 and 2.8-folds higher than that of the pure BiVO4 and g-C3N4, respectively. These nanohybrid materials can be potential candidates for light harvesting applications