Facile Synthesis and Application of Ag-Chemically Converted Graphene Nanocomposite

An in situ chemical synthesis approach has been employed to prepare an Ag-chemically converted graphene (CCG) nanocomposite. The reduction of graphene oxide sheets was accompanied by generation of Ag nanoparticles. The structure and composition of the nanocomposites were confirmed by means of transmission electron microscopy (TEM), atomic force microscopy (AFM) and X-ray diffraction. TEM and AFM results suggest a homogeneous distribution of Ag nanoparticles (5-10 nm in size) on CCG sheets. The intensities of the Raman signals of CCG in such nanocomposites are greatly increased by the attached silver nanoparticles, i.e., there is surface-enhanced Raman scattering activity. In addition, it was found that the antibacterial activity of free Ag nanoparticles is retained in the nanocomposites, which suggests they can be used as graphene-based biomaterials.

Ionic Liquid-Assisted One-Step Hydrothermal Synthesis of TiO2-Reduced Graphene Oxide Composites

我们为可溶的减少的 graphene 氧化物表(RGO ) 和钛氧化物(TiO2 ) 的准备的制造表明了灵巧、有效的策略用一出修改一步舞的 nanoparticle-RGO composites 热水的方法。graphene 氧化物能容易作为 reductant 与维生素酸在 solvothermal 条件下面被减少，这被发现，与 RGO 表面上的 TiO2 粒子的伴随物生长。TiO2-RGO 合成被 Fourier 变换彻底地描绘了红外线的光谱学，拉曼光谱学， X 光检查衍射， X 光检查光电子光谱学，和 thermogravimetric 分析。显微镜学技术(扫描电子显微镜学，原子力量显微镜学，和传播电子显微镜学) 被采用了探查词法特征以及调查 RGO 表的脱落。TiO2-RGO 氢的合成展出优秀光催化进化。