Mesoporous materials are materials with high surface area and intrinsic porosity, and therefore have attracted great research interest due to these unique structures. Mesoporous titanium dioxide (TiO2) is one of the most widely studied mesoporous materials given its special characters and enormous applications. In this article, we highlight the significant work on mesoporous TiO2 including syntheses and applications, particularly in the field of photocatalysis, energy and biology. Different synthesis methods of mesoporous TiO2—including sol–gel, hydrothermal, solvothermal method, and other template methods—are covered and compared. The applications in photocatalysis, new energy batteries and in biological fields are demonstrated. New research directions and significant challenges of mesoporous TiO2 are also discussed.

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Graphene oxide (GO) and silicon dioxide (SiO 2 ) nanoparticles have been hybridized for improving the mechanical and dynamic mechanical properties of nitrile rubber (NBR). SiO 2 nanoparticles were homogeneously dispersed on the surface and between layers of GO, and the new hybrid nanoparticles formed (GO/SiO 2) had better thermal stability than GO. To evaluate the mechanical properties, GO/SiO 2 /NBR nanocomposites were prepared by solution blending and mechanical solution methods. It was observed that tensile strength increased in a larger grade in GO/SiO 2 /NBR nanocomposites than that in GO/NBR and SiO 2 /NBR nanocomposites, while the elongation at break only changes smoothly. Moreover, dynamics measurements also indicated that the elasticity increased after adding GO/SiO 2 hybrid nanoparticles in NBR. From morphology's analysis of GO/SiO 2 /NBR and GO/NBR nanocomposites, it is was conclude that the hybridization of the GO/SiO 2 was the determining factor for the reinforcement of the mechanical properties and elasticity of the NBR.

Graphene/Fe3O4 hybrid particles synthesized by co-precipitation can be finely dispersed in NBR as fewer-layered sheets, resulting in great improvement on mechanical property of NBR composite even at very low filler content.