Journal
CRYSTENGCOMM
Volume 13, Issue 6, Pages 1831-1837Publisher
ROYAL SOC CHEMISTRY
DOI: 10.1039/c0ce00462f
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Funding
- Foundation of National Laboratory of Solid State Microstructures, Nanjing University [2010ZZ18]
- National Key Project for Basic Research, People's Republic of China [2005CB623605, 2011CB922102]
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Flower-like hierarchical Ni-3(NO3)(2)(OH)(4) and Zn-5(OH)(8)(NO3)(2)(H2O)(2) compounds were synthesized by a simple solvothermal method. Absolute ethanol was adopted as solvent, and the precursor is the corresponding nitrate. The as-prepared products were studied by XRD, SEM, TEM, and SAED. It is noted that compared to the conventional oil-water surfactant system, this biosafe alcohol system is simpler and environmentally more benign. Through calcination of the as-synthesized nickel and zinc compounds, nanoporous NiO and ZnO were generated. The optical properties of the nanoporous NiO and ZnO microcrystals have been discussed in terms of photoluminescence (PL) at room temperature. An emission band centered at ca. 2.3 eV that could only be found by cathodoluminescence was observed for the NiO microcrystals. We tentatively assign the peak to the magnetic exciton state 3d(8)2p and relate it to the unique nanostructure of the nanoporous NiO microcrystals.
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