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论文类型：期刊论文

发表时间：2008-01-01

发表刊物：JOURNAL OF MATERIALS CHEMISTRY

收录刊物：SCIE、EI、Scopus

卷号：18

期号：30

页面范围：3601-3607

ISSN号：0959-9428

摘要：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.