Continuous supercritical solvothermal synthesis of TiO2–pristine-graphene hybrid as the enhanced photocatalyst

摘要: Abstract A continuous supercritical solvothermal technique was developed for synthesizing TiO 2 –graphene hybrids, with the pristine graphene sheets used as crystallization sites and nanoparticles crystallized on graphene, forming hybrids simultaneously. The structure morphology of fabricated were characterized via X-ray diffraction, transmission electron microscopy high resolution microscopy. uniform obtained at different concentrations while temperature, pressure resident time fixed 350 °C, 23 MPa, 30 s, respectively. particles formed approximately 5–10 nm in size dispersed uniformly. Compared pure commercial P25, photocatalytic efficiency greatly enhanced. hybrid enabled methyl orange dye to degrade almost completely 180 min, only 78% 82% degraded separately by P25. This enhanced performance is attributed well distributed-TiO rapid transfer photo-generated electrons from surface catalyst thereby preventing a electron–hole recombination.