Ultrafiltration membrane's efficiency and antifouling properties can be enhanced by blending with benign tailor made inorganic nano-materials. Carbon adhered Fe3O4 hollow nanotube, nanosheet synthesized from iron alkoxide using iron (III) acetate source refluxed with methanol. The prepared Fe3O4 (nanotubes & nanosheets) were characterised by PXRD, FE-SEM, TEM, FT-IR and elemental analysis. Polymer nanocomposite membranes were prepared by blending PVDF (14 wt%)/Fe3O4 (2 wt%)/DMF and characterised in detail. PVDF/Fe3O4 (hollow nanotube) composite membrane showed enhanced flux property and antifouling efficiency confirmed by BSA rejection and molecular weight cut-off (MWCO). The biofilm formation studies of PVDF/Fe3O4 hollow nanotube composite membrane were evaluated using E. coli, fresh water Bacillus subtilis and marine Bacillus bacteria showed excellent control of biofilm growth by PVDF/Fe3O4 (hollow nanotube) membrane. The antifouling studies of PVDF blank and PVDF/Fe3O4 (holow nanotube) with B. subtilis and P. aeruginosa showed 0.943 ± 0.02, 0.932 ± 0.01 A.U for PVDF blank and 0.88 ± 0.02 and 0.802 ± 0.02 A.U, and this indicates the significant antifouling control arise from the Fe nanomaterial. Display omitted •Synthesis of carbon adhered iron oxide hollow nanomaterial (tube, sheet).•Characterization by PXRD, FE-SEM and HR-TEM.•Preparation of PVDF ultrafiltration composition membrane using iron oxide nanomaterial.•Effect of nanomaterial on membrane's flux and antibiofouling property.