Preparation And Property Research Of MoS₂ Titania Nanoheterojunctions

Two kinds of MoS2 titania nanoheterojunctions with different morphologies was synthesized via two different approaches. They are facile and additives free hydrothermal processes which would result high material productivity and controllable morphologies. One of them is three dimensional TiO2 based composite with waves-like MoS2 which is defined as TiO2@MoS2, and the other is MoS2 nanoflowers based composite with TiO2 nanoparticles which is defined as MoS-2@TiO2. The synthesis directions and their growth mechanisms were both discussed. Based on our hypothesis and the morphologies of two nanoheterojunctions, we have conducted field emission and photocatalyst experiment of MoS2 nanoflowers, TiO2 nanospheres, and two nanoheterojunctions. By comparison we have discovered, the application performance of nanoheterojunctions had been significantly improved, on the other hand, the morphology advantages and the formation of p-n junction was proven to be the key factor that affect the material performance. Therefore we can foresee that MoS2 titania nanoheterojunctions have great potential to become a efficient water pollution degradation and field emission display material. The innovations of this article have been listed as below.1. By studying the synthesis and morphology of the MoS2 nanoflowers and TiO2 nanospheres, we discovered that reagent which had been reduced in proportion can be used to add on the other material, resulting wave like MoS2 petals as well as massive TiO2 points present.2. By conducting XRD characterization of MoS2 titania nanoheterojunctions in detail, and comparing two different nanoheterojunctions with same material component, we discovered the morphology and the proportion of single material in the composite result in the peak difference in XRD patterns.3. Some research had showed that the nanoparticles can be served ad effective emission points for field emission. In this work, we successful disperse nanoparticles uniformly on the MoS2 petals, resulting outstanding performance. The corresponding theory for this enchantment had also been offered.4. In the synthesis of TiO2@MoS2 nanoheterojunction, we fully utilize the active {001} plane and sphere structure of TiO2 nanosphere, and improved surface area of the heterojunction by covering wave like MoS2 petals. The advantages of this combination had been proven to be effective in the photocatalytic experiment.