Characterization of reduced graphene oxide-TiO2
composites The surface morphology and structure of the rGO-TiO2 nanocomposite were characterized using FESEM and HRTEM. From Figure 2a, b, it is observed that the surface
of rGO sheets was packed densely with TiO2 nanoparticles, which displayed a good combination of rGO and TiO2. Despite that, the profile of a single TiO2 nanoparticle could be clearly distinguished, indicating that the aggregation of TiO2 was well prevented during the preparation process. The TiO2 particles were also found to exhibit a narrow size distribution with an average crystallite size of 12 nm. The corresponding HRTEM images (Figure 2c, d) clearly showed the lattice fringes of rGO, which were parallel to the edges of the TiO2 nanoparticles. The lattice spacing of TiO2 was measured to be ca. 0.35 nm, which corresponds to the (101) plane of anatase TiO2 (JCPDS no. 2101272). The rGO sheets were composed of a mixture of two to five layers based on HRTEM observations.
Characterization of reduced graphene oxide-TiO2composites The surface morphology and structure of the rGO-TiO2 nanocomposite were characterized using FESEM and HRTEM. From Figure 2a, b, it is observed that the surfaceof rGO sheets was packed densely with TiO2 nanoparticles, which displayed a good combination of rGO and TiO2. Despite that, the profile of a single TiO2 nanoparticle could be clearly distinguished, indicating that the aggregation of TiO2 was well prevented during the preparation process. The TiO2 particles were also found to exhibit a narrow size distribution with an average crystallite size of 12 nm. The corresponding HRTEM images (Figure 2c, d) clearly showed the lattice fringes of rGO, which were parallel to the edges of the TiO2 nanoparticles. The lattice spacing of TiO2 was measured to be ca. 0.35 nm, which corresponds to the (101) plane of anatase TiO2 (JCPDS no. 2101272). The rGO sheets were composed of a mixture of two to five layers based on HRTEM observations.
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