Fig. 2: Structural characterizations of Au/TiO2@pSiO2 with varying silica pore sizes. | Nature Communications

Fig. 2: Structural characterizations of Au/TiO2@pSiO2 with varying silica pore sizes.

From: Simultaneous promotion of photocatalytic CH4 conversion and H2O2 production via nanopore water confinement

Fig. 2: Structural characterizations of Au/TiO2@pSiO2 with varying silica pore sizes.

a Schematic illustration of the preparation of Au/TiO2@pSiO2-X catalysts. The black dashed box highlights the template agents used in material synthesis: C12TAB, dodecyltrimethylammonium bromide; C16TAB, cetyltrimethylammonium bromide. b HR-TEM image of Au/TiO2@pSiO2-1.7 catalysts. The white dashed line outlines the porous SiO2 shell, and the white arrow points to the SiO2 shell. c A High-angle annular dark-field scanning transmission electron microscopy (HAADF-STEM) image of Au/TiO2@pSiO2-1.7 catalysts. White arrows point to the highly dispersed Au NP and TiO2 core, respectively. d EDS mapping images of Au/TiO2@pSiO2-1.7. Different colors correspond to different elements (red: Ti; green: Si; yellow: Au; cyan: O). e N2 adsorption-desorption isotherms of Au/TiO2 and Au/TiO2@pSiO2-X. f Pore size distribution of Au/TiO2 and Au/TiO2@pSiO2-X. g UV-Vis DRS of Au/TiO2 and Au/TiO2@pSiO2-X.

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