Journal
JOURNAL OF MATERIALS CHEMISTRY
Volume 18, Issue 30, Pages 3601-3607Publisher
ROYAL SOC CHEMISTRY
DOI: 10.1039/b805843a
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Two novel mesoporous nickel phosphates (NiPO-1 and NiPO-2) with nanotubular structures were developed in the presence of cationic surfactant and different bases by a sol-gel method. The mesostructures of NiPO-1 and NiPO-2 are composed of nanotubes of different lengths, which are arranged by a less-ordered lamellar symmetry as synthesized. ICP elemental analysis revealed that they are different compounds. The Ni/ P molar ratios of NiPO-1 and NiPO-2 are 1.57 and 1.20, respectively. Both materials possess a relatively high BET surface area (205 -292 m(2) g(-1)) and good thermal stability up to 673 K. It is found that these novel materials exhibited high activity (> 50%) and high selectivity to epoxide (95.6% and 99.0%) in the epoxidation of cyclododecene with H(2)O(2) as oxidant.
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