Preparation Of One-dimensional Nanostructures Based On G-C₃N₄ And Their Photocatalytic Performance

Graphitic carbon nitride（g-C₃N₄）are usually used as an important photocatalysis owing to its appealing electronic band structure,high physicochemical stability,and “earth-abundant” nature.It has become one of the hotspot of research due to its wide applications in the fields of water splitting,CO2 reduction,pollutant degradation,etc.However,traditional g-C₃N₄ materials have difficulties in recovery and separation.Thus,it is a novel method to assemble g-C₃N₄ and magnetic materials in one composite materials to solve the problem by taking advantage of magnetic separation quality of magnetic materials.Electrospinning has been proved to be an important method to fabricate one-dimensional nanomaterials due to its convenient operation and high reproducibility.Hence,it is an important subject to fabricate graphitic carbon nitride one-dimensional compostie nanomaterials via electrospinning technology.In this dissertation,g-C₃N₄/Fe₃O₄/PAN composite nanofibers,g-C₃N₄/PMMA composite nanobelts and g-C₃N₄/Fe₃O₄/PMMA composite nanoblets has been fabricated via electrospinning technology.All of the samples were systematically characterized by a series of measurement techniques.The results reveal that the composite nanomaterials simultaneously possess excellent photocatalysis and magnetism performance.The photocatalytic activities of samples were studied by using rhodamine B（Rh B）as degradation agent.When g-C₃N₄/PMMA composite nanobelts are used as the photocatalyst,the degradation rate of Rh B solution under the visible light irradiation for 200 min can reach 98 %.While the degradation rates of Rh B solution using g-C₃N₄/Fe₃O₄/PAN composite nanofibers and g-C₃N₄/Fe₃O₄/PMMA composite nanobelts after 220 min irradiation can respectively reach 96.7 % and 95.8 %.Furthermore,the photocatalytic and magnetic performances of the composite nanomaterials can be respectively tunable by adding different amounts of g-C₃N₄ and Fe₃O₄ nanoparticles.At the same time,the prepared composite nanomaterials can achieve the purpose of magnetic separation for recycling.