Hyperpolarized (HP) 129Xe NMR was used to probe the porosity and interconnectivity of pores in self-assembled hybrid TiO 2-graphene nanostructures. We have demonstrated that HP 129Xe NMR is a powerful technique in probing any changes in porosity and interconnectivity of the pores caused by the addition of a small amount of functionalized graphene sheets (FGSs) (1% weight percent) into the network of mesoporous TiO 2. To obtain the information on the changes in porosity and interconnectivity of the pores caused by the addition of a small amount of FGSs, a comparative study has been carried out by acquiring HP 129Xe NMR spectra under identical experimental conditions for both pure mesoporous TiO 2 and hybrid TiO 2-FGSs. The HP 129Xe NMR results from our comparative study suggest that TiO 2 and graphene are mixed uniformly on the nanoscale and the resulting hybrid nanostructure has better channel connectivity between different domains, enhancing the transport property for Li-insertion/extraction.
All Science Journal Classification (ASJC) codes
- Electronic, Optical and Magnetic Materials
- Physical and Theoretical Chemistry
- Surfaces, Coatings and Films