摘要
Inorganic-organic hybrid WOx-ethylenediamine （WO/-EDA） nanowires have been produced by a simple, low-cost and high-yield solvothermal method. These WO/-EDA hybrid nanowires have unique lamellar mesostructures with an alternate stacking of an interconnected [WO6] octahedral layer and a monolayer of ethylenediamine molecules. This hybrid structure integrated the functionality of ethylenediamine with the stability of the WOx frameworks. In situ synchrotron- radiation X-ray diffraction is used to elucidate a possible formation mechanism of the hybrid WOx-EDA. The nanowire morphology, lamellar structure and abundant functional amino groups endow them with versatile abilities. For example, in heavy metal ion adsorption the WOx-EDA nanowires display exceptional adsorption capabilities of 925 mg·g^-1 for Pb^2＋ and 610 mg·g^-1 for UO2^2＋. The nanowires also show outstanding stability and activity as a heterogeneous base catalyst in the Knoevenagel condensation reaction at room temperature. The catalyst can be recycled and reused for 20 cycles with nearly 100% yields. This study provides a new strategy to design inorganic-organic hybrid materials, and offers a multifunctional material that is a highly efficient adsorbent and sustainable catalyst.
基金
Acknowledgements We are grateful for financial support from the National Basic Research Program of China （2009CB930400）, the National Natural Science Foundation of China （NSFC 21121063） and the Joint Research Project funding （GJHZ1224） from the Chinese Academy of Sciences and the Commonwealth Scientific and Industrial Research Organisation （CSIRO）. We thank the Institute of Modem Physics, Chinese Academy of Sciences for providing the UO2（NO3）2＂6H20 salts and uranium content measurements. We acknowledge the Australian Synchrotron for access to the Powder Diffraction beamline. We thank Ian Madsen （CSIRO Process Science and Engineering） for providing access to the in situ XRD instrument and for a critical reading of the manuscript. The CSIRO Office of the Chief Executive （OCE） Postdoctoral and Science Leader Schemes are acknowledged for supporting this work. R. A. C. acknowledges the Australian Research Council for a Future Fellowship （FT0990583）.
