Synthesis And Papplications Of VA Metal Sulfides Nanomaterials In Electrochemistryand Photocatalysis

Lithium-ion batteries(LIBs)have been broadly used in portable electronic devices and new energy automobiles,because they are their high energy density,specific capacity,long cycle life and environment friendly.Review the development of LIBs in recent years,Lithium-ion battery cycle life,specific capacity and safety performance are constantly improving.As the key material of lithium-ion battery,the choice of anode materials not only decides the electrochemistry performance of the battery,but also affects the cost of the battery,which plays a crucial role in whether it can be commercial production and application.Graphite,the most commonly used negative electrode material,is currently unable to meet the needs of the current social market due to its low theoretical capacity(372 m A h/g)and poor rate capability for current lithium-ion batteries.Recently,because of the rapid development of industrial economy,water pollution has seriously threatened the daily health and survival of people.photocatalytic technology because of its lower cost,significant effect,non-toxic effects and sustainable use,it has become a hot spot for solving environmental problems,especially sewage treatment problems.The main work of this paper are as follows:(1)The Bi₂S₃nanorods was prepared by hydrothermal method,then coated with polydopamine(PDA)to synthesize Bi₂S₃/C composites.Because of its high specific capacity,unique nanostructure and carbon coating,the material shows excellent electrochemical performance.The prepared Bi₂S₃/C nanocomposite was employed as anode material for lithium-ion batteries and showed high energy storage property with discharge capacity of 339 m A h/g at 1.2 A/g after 700 cycles.(2)We have successfully designed and fabricated a novel 1D/2D heterostructure of Sb₂S₃@MoS₂nanorods by a simple and facile method of two step hydrothermal.Sb₂S₃@MoS₂nanorods perform an enhanced photoactivity in degrading Rhodamine B(Rh B)with a decomposition efficiency of?99%.The excellent photocatalytic property is attributed to the properly constructed heterojunction between Sb₂S₃and MoS₂,which can broaden the photoadsorption range.