Replication and Coating of Silica Templates by Hydrothermal Carbonization


  • This work was supported by funding from the framework project ENERCHEM. We thank Shu-Hong Yu for all his contributions in the joint HTC project and Dr. Torsten Brezesinsky for the XPS measurements. Supporting Information is available online from Wiley InterScience or from the author.


Hierarchical carbon materials with functional groups residing at the surface are prepared for the first time by using nanostructured silica materials as templates in combination with hydrothermal carbonization at mild temperatures (180 °C). Different carbon morphologies (e.g., macroporous casts, hollow spheres, carbon nanoparticles, and mesoporous microspheres) can be obtained by simply altering the polarity of the silica surface. The surface functionality and hydrophilicity of the resulting materials are assessed by Fourier transform IR spectroscopy, X-ray photoelectron analysis, and water porosimetry. Raman spectroscopy and X-ray diffraction measurements show that the materials are of the carbon-black type, similar to charcoal.