Preparation And Function Of Graphene-based Membrane Materials

Graphene-based membrane material is a membrane material based on graphene film, which not only retains the excellent properties of graphene sheets, but also exhibit new and enhanced properties. In this paper, we have constructed two graphene-based membrane material, the results are summarized as follows:1. We describe a synchronous reduction and assembly procedure to directly produce large-area reduced graphene oxide(r GO) films sandwiched by a high density of metal nanoparticles(silver and copper). Further, by using the sandwiched metal NPs as sources, we form structurally and functionally integrated r GO/metal-TCNQ hybrid films with outstanding flexibility, bending endurance, and electrical stability. Interestingly, due to the p-type nature of the r GO film and the n-type nature of the metal-TCNQ NWs, the hybrid films are essentially thin-film p–n junctions which are useful in ubiquitous electronics and optoelectronics. Also, the films exhibit substantial photoconductivity and highly reproducible photoswitching behaviours. The present approach may open the door to the versatile and deterministic integration of functional nanostructures into flexible conducting substrates and provide an important step towards producing low-cost and high-performance soft electronic and optoelectronic devices.2. We have successfully achieved a continuous r GO-aniline film via a synchronous reduction and assembly strategy. With further nitrogen doped by DMF, r GO-polyaniline films were successfully prepared. The nitrogen-doped polyaniline and graphene sheets are assembled into a continuous layered structure on a copper foil, which is more conducive to electronic transmission. This study found that the film exhibits great potential in the water splitting applications with solar visible light, and the photocatalytic activity did not show significant decreases after repeated use.3. A new kind of self-standing Cu O@Ti O2 NWs film with hierarchical feature was prepared by a three-step protocol consisting of hydrothermal reaction, electroless plating, and branched growth processes. This heterostructured Cu O@Ti O2 NWs film demonstrates the favorable physical properties in the PEC water splitting, and under the illumination of the simulated solar light, the Cu O@Ti O2 NWs film yields a dramatically increased photocurrent density compared with pristine Ti O2 NWs film. Furthermore, amperometric I-t tests of the Cu O@Ti O2 NWs film reveal satisfactory stability. All the above characteristics of this heterostructured Cu O@Ti O2 NWs film indicate its great potential in the water splitting applications with solar visible light.