In recent times, impregnation of inorganic particle as filler to membrane has become a versatile approach. Improvement in the antifouling characteristics of pure PVDF by adding different doses of TiO₂ nanoparticle synthesized from leaf extract (biomass) of pigeon pea was studied. The membrane of PVDF and its composite were prepared via phase inversion technique. Fouling phenomenon of composite membrane was assessed by corelating the impact of biogenic synthesis of NP addition on the surface charge, that is, contact angle to interfacial interactions that prevail between foulants and TiO₂ immobilized membranes surface and were evaluated mathematically based on the extended Derjaguin–Landau–Verwey–Overbeek (XDLVO) approach. This theory predicts an increase in strength of repulsive interactive energy barrier with an increase in TiO₂ loading. Also, the optimal dosing of TiO₂ loading was also investigated from volume porosity, hydrophilicity, AFM analysis, and permeability parameter. The paper presented at optimized TiO₂ loading had the lowest fouling phenomenon compared to other fabricated membranes with high flux recovery ratio (FRR) and lowest irreversible fouling rate (IFR) which favors easy cleaning of the membrane by physical treatment.