2, Empa–Swiss Federal Laboratories for Materials Science and Technology, Zurich, Zurich, Switzerland
Despite the excellent properties observed in individual nanoparticle or (sub-nano) cluster, the current possibilities to assemble them into a complex system for practical applications are not sufficient. An important objective of this project is to develop a fabrication technology allowing for simultaneous control of nanoparticle surface chemistry, atomic component distribution, microscale geometry, and large scale assembly. With the cellulose matrix derived from wood as a scaffold, we are going to fabricate hierarchical porous cellulose and cerium doped TiO2 hybrid materials. The hybrid materials will serve as high surface area support of sub-nano Pt clusters generated by photochemical synthesizing. The as-synthesized materials will be used to promote the low temperature decomposition of trace ethylene which is the main ripening agent that causes a faster deterioration of fresh food. Advances in this field will have an impact on the optimization conflict between large active interfaces required and the difficulties in nanopowder handling in environmental catalysis, including food preservation and indoor air cleaning. Our research can open new avenues for the manufacturing of multifunctional materials with complex architectures by combining the controllable chemical synthesis with the nature-determined scaffold.
Key words: wood science, food preservation, heterogeneous catalysis, porous matrix